centos7防火牆操作

1.查看防火牆操作

>systemctl status firewalld

 

2.暫時打開/關閉防火牆

#啓動
>systemctl start firewalld     
#關閉
>systemctl stop firewalld

 

 3.永久打開/關閉防火牆

#打開
>systemctl enable firewalld
#關閉
>systemctl disable firewalld
#重啓後生效
>reboot

 

 4.開放端口

firewall-cmd --zone=public --add-port=3306/tcp --permanent
firewall-cmd --reload