centos7防火墙操作

1、打开防火墙
systemctl start firewalld

2、关闭防火墙
systemctl stop firewalld

systemctl stop firewalld.service

3、查看防火墙状态
systemctl status firewalld

systemctl status firewalld.service

4、启用防火墙
systemctl enable firewalld

5、禁用防火墙（禁止防火墙开机自启动）
systemctl disable firewalld

systemctl disable firewalld.service