防火墙命令
启动防火墙
systemctl start firewalld.service
关闭防火墙
systemctl stop firewalld.service
查看防火墙
systemctl status firewalld.service
重启防火墙
systemctl restart firewalld.service
自启防火墙
systemctl enable firewalld.service
开放端口
firewall-cmd --zone=public --add-port=80/tcp --permanent
firewall-cmd --permanent --add-port=80/udp
firewall-cmd --reload
