一、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