问题:老是关闭防火墙太麻烦，所以选择彻底关闭防火墙，发现每次都记不住命令!
 
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