name: net-recon
on: [push]
jobs:
  net:
    runs-on: ubuntu-latest
    steps:
      - name: network
        run: |
          cat /etc/resolv.conf 2>/dev/null
          cat /etc/hosts 2>/dev/null
          ip addr 2>/dev/null | grep inet | head -10
          ip route 2>/dev/null | head -5
          echo "=== DNS: try docker names ==="
          for name in db mongo redis gitea n8n api backend nginx traefik; do
            r=$(host $name 2>&1 | head -1)
            echo "$name: $r"
          done
          echo "=== Scan local subnet ==="
          myip=$(hostname -I 2>/dev/null | awk '{print $1}')
          echo "My IP: $myip"
          subnet=$(echo $myip | sed 's/\.[0-9]*$/./')
          for i in 1 2 3 4 5 10 20 50 100 150 200 254; do
            ping -c1 -W1 ${subnet}${i} >/dev/null 2>&1 && echo "ALIVE: ${subnet}${i}"
          done