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Packet filtering in linux

This is a discussion on Packet filtering in linux within the Linux Support forums, part of the Tech Support Forum category. Hi guys! I am attempting to build an open source firewall in linux and I need to know how to


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Old 07-06-2011, 08:00 AM   #1
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Hi guys! I am attempting to build an open source firewall in linux and I need to know how to filter packets WITHOUT using iptables. Once a packet is inspected a decision is made whether it should be dropped or not. Now to drop the packet I need to stop it from entering the kernel in the first place otherwise it would be forwarded automatically.

How do i do that? Is it possible using netfilter?

Reply will be highly appreciated.

Thanx in advance :)

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Old 07-06-2011, 12:42 PM   #2
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Hi,

Please tell us what software you are using, that will help us with what commands you should use.

Cheers!
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