CentOS7
[root@localhost ~]#cat /etc/redhat-release
CentOS Linux release 7.2.1511 (Core)
1.关闭firewall
[root@localhost ~]#systemctl stop firewalld.service //停止firewall
[root@localhost ~]#systemctl disable firewalld.service //禁止firewall开机启动
2.安装iptables
[root@localhost ~]#yum install iptables-services //安装
[root@localhost ~]#systemctl restart iptables.service #重启防火墙使配置生效
[root@localhost ~]#systemctl enable iptables.service #设置防火墙开机启动
[root@localhost ~]#systemctl disable iptables.service #禁止防火墙开机启动
CentOS6
[root@localhost ~]# service iptable status —查看防火墙状态
[root@localhost ~]#servcie iptables stop –临时关闭防火墙
[root@localhost ~]#service iptables start –临时启动防火墙
[root@localhost ~]#service iptables restart –重启防火墙
[root@localhost ~]#chkconfig iptables off –永久关闭防火墙
[root@localhost ~]#chkconfig iptables on –永久开启防火墙
