I am planning to implement a firewall for Linux. However, I don't know where to start from. I have tried to lookup reference sites, but could not find any. Could you please recommend any relevant web sites or books?

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Here's a reference implementation. Have fun! – Praetorian Sep 14 '11 at 8:09
IMO belongs on serverfault. – Jan Hudec Sep 14 '11 at 8:24
I don't think it belongs to serverfault, as this is purely programming question, as I understand it. It is not about using a firewall, it is about firewall development, kernel API, etc. – Vlad Lazarenko Sep 14 '11 at 12:24
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migrated from stackoverflow.com Sep 14 '11 at 12:27

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