Centos 7 service iptables save报出错解决办法

首先停止防火墙
systemctl stop firewalld
systemctl mask firewalld

Yum安装
yum install iptables-services
开机启动
systemctl enable iptables
iptbales命令：
systemctl [stop|start|restart] iptables

iptables开启 80、3306、22端口请参考
https://www.cxybj.com/?p=274