hi guys,    I have written an article[1] for newbies who are willing to learn networking stuff in linux kernel. I hope this introduction-level article can help you understand the mechanism of netfilter and NIC driver. For this article, any critical comments are welcomed! [1] http://hfg-resources.googlecode.com/files/hacking_the_wholism_of_linux_net.t... -- GNU powered it... GPL protect it... God blessing it... regards Shawn