https://www.linux.com/learn/introduction-uncomplicated-firewall-ufw

1root@xxx:/var/log# ufw status 2Status: active 34To Action From 5-- ------ ---- 622 LIMIT Anywhere 780 ALLOW Anywhere 8443 ALLOW Anywhere 9??41908/tcp ALLOW Anywhere 10Anywhere ALLOW 115.85.11.98 1125/tcp ALLOW Anywhere 124444/tcp ALLOW Anywhere 134444/udp ALLOW Anywhere 1422 (v6) LIMIT Anywhere (v6) 1580 (v6) ALLOW …