摘要
本文首先重点剖析了内核 2 .4版本后的Netfilter框架的组成和主要功能 ,钩子函数接入点 ,实现方式及主要函数源代码分析 ,然后指出了包过滤防火墙的缺陷 ,最后给出了实现命令级内容过滤的模型和方法 .
The article firstly introduces the mainly functions compositions of netfilter later than 2.4 version of Linux kernel, hook functions, implementation, and analysis about source, and then it point out the fault of packet filtering firewall. At last, the model and method of implementation of content filter based on command of application protocols are given.
出处
《哈尔滨师范大学自然科学学报》
CAS
2003年第6期39-42,共4页
Natural Science Journal of Harbin Normal University
