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- #!/usr/bin/env bash
- # Enhanced network scanner with proper port number handling
- # Get network info
- interface=$(ip route | awk '/default/ {print $5}')
- ip_range=$(ip -o -f inet addr show | awk '/scope global/ {print $4}' | head -n1)
- echo "Scanning network on interface $interface (range: $ip_range)"
- echo "----------------------------------------"
- # Scan hosts
- nmap -sn $ip_range | awk '/Nmap scan/ {print $5, $6}' | while read -r ip host; do
- echo "├── $ip ($host)"
- # Scan common ports with service detection (-sV)
- # Using -F for fast scan (100 most common ports) and -T3 for normal timing
- nmap -T3 -F -sV --min-rate=100 $ip | awk -v ip="$ip" '
- /^[0-9]+\/tcp/ {
- port = $1;
- sub("/tcp", "", port);
- service = $3;
- for (i=4; i<=NF; i++) service = service " " $i;
- # Only show ports below 10000 or known services
- if (port < 10000 || service != "unknown") {
- printf("│ ├── %s/tcp (%s)\n", port, service);
- }
- }
- ' | sort -n
- done
- echo "----------------------------------------"
- echo "Scan completed"
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