centos7防火墙常用命令

查看状态    systemctl status firewalld

安装防火墙    yum install firewalld  

开启服务    systemctl start firewalld.service

开机自动启动    systemctl enable firewalld.service

关闭防火墙    systemctl stop firewalld.service

关闭开机制动启动    systemctl disable firewalld.service

修改yum加速插件：   vi /etc/yum/pluginconf.d/fastestmirror.conf  enable=0