禁用端口25和PHP Mail 避免服务器IP被封-同样适用于directadmin

865 阅读技术资料DirectAdmin
1

今天下午,因为一个用户滥用邮件,导致directadmin空间的IP被机房封掉了。为了避免此类教训,非常有必要禁用端口25和PHP Mail 。

防火墙禁用25端口

方法:

先用iptables屏蔽全部IP连接25端口:
iptables -I FORWARD -p tcp --dport 25 -j DROP
iptables -I INPUT -p tcp --dport 25 -j DROP
iptables -I OUTPUT -p tcp --dport 25 -j DROP
 只允许特定ip连接25端口:
iptables -I FORWARD -s 108.171.12.51 -p tcp --dport 25 -j ACCEPT
 重新禁止此ip连接25端口,删除上述许可记录就可以了:
 iptables -D FORWARD -s 108.171.218.51 -p tcp --dport 25 -j ACCEPT
  如果默认已经允许了全部ip链接25端口(大部分机器默认就允许)
需要禁止特定ip连接25端口:
iptables -I FORWARD -s 108.171.12.51 -p tcp --dport 25 -j DROP

防火墙的其它操作:

# 查看防火墙状态
service iptables status
  # 停止防火墙
service iptables stop
  # 启动防火墙
service iptables start
  # 重启防火墙
service iptables restart
  # 永久关闭防火墙
chkconfig iptables off
  # 永久关闭后重启
chkconfig iptables on

在 php.ini 中添加禁用函数:mail。

参考:https://help.directadmin.com/item.php?id=301。如下:

Usually your php.ini will be located at (XX - PHP version, for example 73):
/usr/local/phpXX/lib/php.ini
   CustomBuild 2.0 installs will also uses the php.conf.d directory to load miscellaneous .ini files into php.  The files that CustomBuild will create are:
/usr/local/php74/lib/php.conf.d/10-directadmin.ini
/usr/local/php74/lib/php.conf.d/50-webapps.ini
  You can add your own files there if you need to add settings or load modules into php, for example:
/usr/local/php74/lib/php.conf.d/11-custom.ini

另外,比较彻底的方法还有:

1. close incoming connections to TCP: 25 110 143 465 587 993 995 with firewall both for ipv4 and ipv6
2. install the latest exim.pl/exim.conf and set global limit for sending emails to 1 (zero would mean no limit at all)
3. enable SMTP_LIMIT in CSF/LFD
4. disable PHP mail() globally.


分享到:
回答于
0

唔,难怪邮件发不出去了,可以单独开放PHP Mail吗?


分享到:
回答于
您正在查看 2 个答案中的1个,单击此处查看所有答案。

Login

Welcome! Login in to your account

Remember me Lost your password?

Don't have account. Register

Lost Password

Register