CentOS 7.2如何关闭系统防火墙

linux学习CentOS 7.2 关闭系统防火墙
#停止firewall服务
#systemctl stop firewalld.service
#禁止firewall开机启动
#systemctl disable firewalld.service
1.关闭防火墙：
systemctl stop firewalld.service

2.开启防火墙：
systemctl start firewalld.service

3.关闭开机启动：
systemctl disable firewalld.service

4.开启开机启动：
systemctl enable firewalld.service