packet filtering engine in kernel 2.2 (skip history, adequately documented elsewhere)
packet filtering engine as part of netfilter in kernel 2.4, backwards compatible support for ipchains
differences between the packet traversal in ipchains and iptables. link to Stef Coene's KPTD (kernel 2.4). Anybody know of a link to a KPTD for kernel 2.2?
本文介绍了Netfilter架构的发展历程,从内核2.2的包过滤引擎到内核2.4中作为Netfilter一部分的包过滤引擎,并详细讨论了iptables在不同链(INPUT、OUTPUT、FORWARD)中的应用及如何通过选择接口实现包过滤。
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