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Packet filtering - firewall

Posted on 2003-03-28
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Last Modified: 2010-04-04
Hi,
I'm working on a smtp port limited firewall (or packet filter) aimed at blocking black listed (spammers) incoming IPs.

I use Delphi 6 with Indy 9.0 and would like to know where I can find some examples of Packet filtering or related routines (listening and filtering packets).

The program just need to filter the packets not make the smtp connection since on the same port I'll have a SMTP server listening. In short it will make the same job as a very limited firewall.

Anybody can give me some help ??

Thanks

Lorenzo (from Brazil).
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Question by:lorpar
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lorpar:
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