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针对目前日益突出的内部网络安全问题，本文对现有安全技术所普遍存在的若干隐患与不足进行了深入地探讨，并提出了一种用于构筑安全内部网的新型体系结构———嵌入式防火墙系统（ Ｅ Ｆ Ｓ） 。该模型以基于 Ｋｅｒｂｅｒｏｓ 协议的认证模块为核心，并集授权、安全数据传输和审计等机制于一体。
In view of the increasingly prominent problems of internal network security, this paper probes into several hidden dangers and deficiencies existing in existing security technologies and puts forward a new type of architecture for constructing secure intranet --- Embedded Firewall System (E F S). The model is based on the Kerberos protocol-based authentication module and integrates mechanisms of authorization, secure data transmission and auditing.