阿里云服务器配置开发环境第五章:Centos7.3切换为iptables防火墙

centos7.3默认使用的防火墙应该是firewall,而不是iptables。所以,在配置防火墙之前,我们需要先关闭firewall,安装iptables。

1.关闭firewall

service firewalld stop
systemctl disable firewalld.service #禁止firewall开机启动

2.安装iptables防火墙

yum install iptables-services

3.编辑iptables防火墙配置

vi /etc/sysconfig/iptables #编辑防火墙配置文件

下边是一个完整的配置文件:

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
4.开启iptables

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

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