测试网卡的时候，经常需要关闭防火墙，下面分享一下关闭防火墙的命令
下面是red hat/CentOs7关闭防火墙的命令!

1:查看防火状态

systemctl status firewalld

service iptables status

2:暂时关闭防火墙

systemctl stop firewalld

service iptables stop

3:永久关闭防火墙

systemctl disable firewalld

chkconfig iptables off

4:重启防火墙

systemctl enable firewalld

service iptables restart

5:永久关闭后重启

//暂时还没有试过

chkconfig iptables on