• netfilter

    Creating a Netfilter kernel module which filters UDP packets

    by  • November 2, 2009 • kernel module, linux, netfilter, networking • 18 Comments

    Last time we created a Netfilter kernel module which simply dropped all packets which gave the structure and functions that need to be implemented for a Netfilter module to work. This time, we’ll extend the functionality to poke into the IP header, specifically the protocol field, in order to perform functionality specific to a packet […]

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