centos7开启关闭端口

一、查看端口开启状态

[zhujiang@localhost n2]$ sudo firewall-cmd --query-port=9998/udp

[sudo] password for zhujiang:

no

二、开启端口

[zhujiang@localhost n2]$ sudo firewall-cmd --add-port=9998/udp --permanent

success

--permanent表示永久生效，重启不会丢失配置。

三、关闭端口

[zhujiang@localhost n2]$ sudo firewall-cmd --remove-port=9998/udp --permanent

Warning: NOT_ENABLED: 9998:udp

success

重新加载配置

[zhujiang@localhost n2]$ sudo firewall-cmd --reload

success

[zhujiang@localhost n2]$