Centos 7 永久关闭防火墙

查看防火墙状态

systemctl status firewalld

出现：Active: inactive (dead)，代表防火墙已关闭

临时关闭防火墙

　　重启后，防火墙会重新开启

systemctl stop firewalld.service 

永久关闭防火墙

systemctl disable firewalld.service