linux命令：防火墙的操作

启动防火墙

[root@localhost ~]# systemctl start firewalld

查看防火墙状态

[root@localhost ~]# systemctl status firewalld

暂时关闭防火墙

[root@localhost ~]# systemctl stop firewalld

永久关闭防火墙

[root@localhost ~]# systemctl disable firewalld

查看防火墙开放的端口列表

[root@localhost ~]# firewall-cmd --list-ports

命令方式开放端口（8081端口为例）

[root@localhost ~]# firewall-cmd --zone=public --add-port=8081/tcp --permanent

[root@localhost ~]# firewall-cmd --reload

[root@localhost ~]# firewall-cmd --list-ports