查看防火墙状态

systemctl status firewalld

启动防火墙

systemctl start firewalld

关闭防火墙

systemctl stop firewalld.service

防火墙开机自启

systemctl enable firewalld.service

允许HTTP

firewall-cmd --permanent --zone=public --add-service=http

允许HTTPS

firewall-cmd --permanent --zone=public --add-service=https

开放端口

firewall-cmd --permanent --zone=public --add-port=[your port]/tcp

重启防火墙

firewall-cmd --reload

检测端口是否被占用

netstat -tunlp |grep [port]