CentOS 切换为 iptables 防火墙
切换到 iptables 首先应该关掉默认的 firewalld, 然后安装 iptables 服务.
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 #安装
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 #开放端口, 复制一条改对应的端口就可以了
- -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
- service iptables start #开启
- systemctl enable iptables.service #设置防火墙开机启动
来源: http://www.bubuko.com/infodetail-2608287.html