当今互联网中许多重要资源是来源于Intranet,他们多用来提供对内的服务和保护.安全嵌层服务体系可以在分布式否定服务攻击下提供自客户端到保护目标之间的安全通信.尽管该体系面对一般的拥塞攻击表现良好,但是当攻击者利用相同攻击手段轮番攻击时,作为安全体系的承载者,Intranet无法对此重复动作做出响应,并浪费了收集攻击者信息的机会,文中对基于联合作业Intranet的效能进行分析,并提出有效措施,从而提高系统的整体效能. Many of the important resources in the Internet today come from the Intranet, and they are often used to provide in-house services and protection.The Secure Layered Services architecture provides secure communication from the client to the protected target under distributed negative service attacks, The system works well in the face of general congestion attack. However, when the attacker takes turns using the same attack, the intranet can not respond to the repeated action and bears the opportunity to collect the attacker’s information. Analyze the effectiveness of Intranet-based operations and propose effective measures to improve the overall system performance.