centos7 启用iptables

centos从7开始默认用的是firewalld,这个是基于iptables的,虽然有iptables的核心,但是iptables的服务是没安装的。所以你只要停止firewalld服务即可: 
sudo systemctl stop firewalld.service && sudo systemctl disable firewalld.service

如果你要改用iptables的话,需要安装iptables服务: 
sudo yum install iptables-services 
sudo systemctl enable iptables && sudo systemctl enable ip6tables 
sudo systemctl start iptables && sudo systemctl start ip6tables

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转载自andyaqu.iteye.com/blog/2374094