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centos7 iptables

 
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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

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