#!/bin/bash
echo '=== vps ips ==='
ip -4 addr | sed -n '1,80p'
echo '=== ping router ==='
ping -c 2 -W 2 172.30.0.1 || true
echo '=== ping 100.80 ==='
ping -c 2 -W 2 100.80.255.113 || true
echo '=== ports router ==='
for p in 22 80 443 8291 8728 8729 21; do
  timeout 2 bash -c "echo >/dev/tcp/172.30.0.1/$p" 2>/dev/null && echo "open $p" || echo "closed $p"
done
echo SCAN_DONE