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本文论述了设计混合型防火墙的目的和希望解决的问题,给出了该型防火墙的结构组成,阐述了其功能原理,并为实现了相关功能编制了该型防火墙的配制文件。该型防火墙在内部网和外部网之间形成一个屏蔽子网,可以较好地抵御来自内外部的威胁,可自动根据具体情况完成内外主机的通信,可智能更新信息的过滤规则、自动配置过滤策略,具有防病毒功能,能自动生成事件日记,同时还提供了Web,Mail等服务。
This paper discusses the purpose of designing a hybrid firewall and the problems to be solved. The structure of the firewall is given, its function principle is described, and the configuration file of the firewall is compiled to achieve the related functions. This type of firewall forms a screened subnet between the internal network and the external network, which can better resist the threats from the inside and outside, can automatically communicate with the internal and external hosts according to the specific conditions, can automatically update the information filtering rules, and automatically configure the filtering Strategy, with anti-virus function, can automatically generate event diary, but also provides Web, Mail and other services.