查看防火墙状态

systemctl status firewalld

暂时关闭防火墙

systemctl disable firewalld

禁止开机自启动防火墙

systemctl enable firewalld

开机自启动防火墙

systemctl stop firewalld

开启防火墙80端口

firewall-cmd --zone=public --add-port=80/tcp --permanent 

重新加载防火墙规则

firewall-cmd --reload

查看防火墙打开的端口

firewall-cmd --zone=public --list-ports

关闭防火墙80端口

firewall-cmd --zone= public --remove-port=80/tcp --permanent