安装防火墙:yum install firewalld systemd -y
防火墙ip查询:service iptables status ;
防火墙状态:systemctl status firewalld;
关闭防火墙命令:systemctl stop firewalld.service
开启防火墙:systemctl start firewalld.service
关闭 开机自启动:systemctl disable firewalld.service
开启 开机启动:systemctl enable firewalld.service
查看已经开放的端口:firewall-cmd --list-ports
开放端口:firewall-cmd --zone=public --add-port=80/tcp --permanent
重启防火墙::systemctl reload firewalld