3-Centos-7-防火墙修改-Firewalld-Iptables

With RHEL 7 / CentOS 7, firewalld was introduced to manage iptables. 

将firewalld-替换为iptables

1. 关闭防火墙

    1.1 systemctl stop firewalld

    1.2 systemctl mask firewalld

2. 安装iptables-services package:

    2.1 yum install iptables-services

    2.2 Enable the service at boot-time:

        systemctl enable iptables

    2.3 Managing the service

        systemctl [stop|start|restart] iptables

    2.4 Saving your firewall rules can be done as follows:
        service iptables save
        or
        /usr/libexec/iptables/iptables.init save