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Rat's Blog - iptables

使用ipset设置防火墙端口白名单,只让指定国家访问 - Rat's Blog Linux VPS一键屏蔽指定国家所有的IP访问 - Rat's Blog Linux VPS使用ipset快速屏蔽指定国家的IP访问 - Rat's Blog iptables封禁BT/PT/SPAM(垃圾邮件)和自定义端口/关键词一键脚本 - Rat's Blog CentOS 7使用iptables开放设置端口 - Rat's Blog 使用iptables进行端口转发 - Rat's Blog Linux使用iptables封IP或IP段教程 - Rat's Blog iptables之禁ping和ddos向外发包 - Rat's Blog
使用iptables封掉所有邮件端口 - Rat's Blog
博主: Rat's · 2016-06-15 · via Rat's Blog - iptables

说明:封掉邮件端口可以防止垃圾邮件

方法

1、直接封掉所有邮件协议端口

iptables -A INPUT -p tcp -m multiport --dport 25,110,465:587,993:995 -j DROP
iptables -A INPUT -p udp -m multiport --dport 25,110,465:587,993:995 -j DROP
iptables -A OUTPUT -p tcp -m multiport --dport 25,110,465:587,993:995 -j DROP
iptables -A OUTPUT -p udp -m multiport --dport 25,110,465:587,993:995 -j 

2、保存iptables设置

iptables-save
service iptables save

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