1、关闭防火墙
systemctl stop firewalld
2、开启防火墙
systemctl start firewalld
3、查看防火墙状态
systemctl status firewalld
4、开机禁用
systemctl disable firewalld
5、开机启用
systemctl enable firewalld
6、开放指定端口
firewall-cmd --zone=public --add-port=80/tcp --permanent
7、重启防火墙
firewall-cmd --reload
8、查看端口是否开放
firewall-cmd --zone=public --query-port=80/tcp
9、关闭指定端口
firewall-cmd --zone=public --remove-port=80/tcp --permanent