【摘要】 文章分析了目前流行的网络互连协议──ＴＣＰ／ＩＰ协议中存在的安全问题和Ｉｎｔｅｒｎｅｔ网的不安全性。在系统地介绍了防火墙系统的基本设计原则的基础上，针对当前防火墙技术中存在的问题，提出了一种新的防火墙方案──基于身份认证和加密技术的包过滤防火墙系统，并对该系统进行了软件的设计与实现。同时探讨了防火墙技术的发展方向。更多还原

【Abstract】 This paper analyzes the security problems of the TCP/IP suite and the insecurity of internet,accordingto the principles of establishing firewall system. It presents a new solution--a filter firewall system based onauthentication and cryptography, which is introduced to solve the existing problems of the current firewall system.It also designs and implements the software of the system,and this paper puts forward some suggests about howto develop netWork firewall.更多还原