https://bk1314.com/12.html zh-CN 1.查看已开放的端口firewall-cmd --list-ports2.开放端口（开放后需要要重启防火墙才生效）firewall-cmd --zone=public --add-port=33... Thu, 01 Jan 1970 08:00:00 +0800 Thu, 01 Jan 1970 08:00:00 +0800