[root@kslk-es-faq ~]# service iptables save
The service command supports only basic LSB actions (start, stop, restart, try-restart, reload, force-reload, status). For other actions, please try to use systemctl.
在centos7上,经常修改了iptables规则后,重启后规则就没了。有些地方使用使用 iptables-save,然而并无卵用;
正确的保存操作是 service iptables save