【摘要】 介绍了防火墙的相关知识,重点分析了netfilter的架构及其构建防火墙的工作原理,讲解了netfilter的配置工具iptables及其与内核的交互,最后说明了netfilter扩展功能的开发方法,并给出了一个实例。更多还原

【Abstract】 This article introduces some knowle dge about firewall,mainly analyses the frame of netfilter and its principle,explains how to interact between kernel and iptables which is the tool for fire-wall ,narrates the development meth od of some expansive functions of netfilter and gives an instance final-ly.更多还原