CentOS 7.0默认使用的是firewall作为防火墙

查看防火墙状态

firewall-cmd --state

停止firewall

systemctl stop firewalld.service

禁止firewall开机启动

systemctl disable firewalld.service

启动firewall

systemctl start firewalld.service

开启firewall开机启动

systemctl enable firewalld.service