CENTOS7防火墙关闭以及启用默认iptables防火墙

centos 7：
systemctl stop firewalld.service #停止
systemctl disable firewalld.service #禁用

之前的版本：
service iptables status #查看状态

service iptables stop #停止chkconfig iptables off #禁用

CentOS 7.0默认使用的是firewall作为防火墙，这里改为iptables防火墙。


1、关闭firewall：


systemctl stop firewalld.service #停止firewall


systemctl disable firewalld.service #禁止firewall开机启动


2、安装iptables防火墙


yum install iptables-services #安装


vi /etc/sysconfig/iptables #编辑防火墙配置文件


# Firewall configuration written by system-config-firewall


# Manual customization of this file is not recommended.


*filter


:INPUT ACCEPT [0:0]


:FORWARD ACCEPT [0:0]


:OUTPUT ACCEPT [0:0]


-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT


-A INPUT -p icmp -j ACCEPT


-A INPUT -i lo -j ACCEPT


-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT


-A INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT


-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT


-A INPUT -j REJECT --reject-with icmp-host-prohibited


-A FORWARD -j REJECT --reject-with icmp-host-prohibited


COMMIT


:wq! #保存退出


systemctl restart iptables.service #最后重启防火墙使配置生效


systemctl enable iptables.service #设置防火墙开机启动