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
