const { Client } = require('ssh2');

const conn = new Client();

conn.on('ready', () => {
  conn.exec('firewall-cmd --list-all 2>/dev/null || iptables -L 2>/dev/null || ufw status 2>/dev/null || echo "No firewall tool found"', (err, stream) => {
    if (err) { console.log('ERR:', err); conn.end(); return; }
    stream.on('data', (d) => console.log('FIREWALL:', d.toString()));
    stream.on('close', () => {
      conn.exec('ss -tlnp | grep :4001', (err2, stream2) => {
        if (err2) { console.log('ERR2:', err2); conn.end(); return; }
        stream2.on('data', (d) => console.log('4001:', d.toString()));
        stream2.on('close', () => conn.end());
      });
    });
  });
});

conn.connect({ host: 'hs.yifenbao.cn', port: 22, username: 'root', password: 'Torch1112' });