玩转Linux之- CentOS 7.0,启用iptables防火墙(转)

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:

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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

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yum install iptables-services #安装
vi /etc/sysconfig/iptables #编辑防火墙配置文件

配置文件修改后如下:

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# 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

保存配置文件

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:wq! #保存退出

重启防火墙,并设置开机启动

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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

转载自:http://www.jb51.net/os/188488.html

本文永久链接: https://www.mulianju.com/centos-iptables/