firewall防火墙
启动: systemctl start firewalld
查看状态: systemctl status firewalld
重启: systemctl restart firewalld
停止: systemctl stop firewalld
添加端口:firewall-cmd --add-port=80/tcp --permanent
(–permanent永久生效,没有此参数重启后失效)
重新载入:firewall-cmd --reload
查看:firewall-cmd --query-port=80/tcp
删除:firewall-cmd --remove-port=80/tcp --permanent
查看所有打开的端口: firewall-cmd --zone=public --list-ports