Packet filtering in linux

[kaidranzer]

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 :)

[wmorri]

Hi,

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

Cheers!