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本文论述了防火墙的功能与体系结构,讲述了如何通过对终端访问、文件传输、电子函件、USENET新闻、WWW以及DNS进行配置来构筑INTERNET防火墙。
This article discusses the features and architecture of firewalls and describes how to build an Internet firewall by configuring terminal access, file transfer, e-mail, USENET news, WWW, and DNS.