Cent OS 7啓用iptables

１　停用firewalld
uname -r
3.10.0-514.26.2.el7.x86_64
systemctl stop firewalld.service
systemctl disable firewalld.service

２　安裝iptables
yum install iptables iptables-services

３　啓用iptables
systemctl start iptables.service
systemctl enable iptables.service

４　保存配置：
service iptables save