CentOS7中启用 iptables报 job for iptables.service failed because the cpntrol process exited with error

运行 systemctl restart iptables.service  #重启防火墙使配置生效。

产生如下错误信息：job for iptables.service failed because the cpntrol process exited with error code.

解决方式，将下面指令挨着执行一遍：

 

service iptables save
systemctl stop firewalld
systemctl disable  firewalld
systemctl start iptables
systemctl status iptables
systemctl enable iptables