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1. 发明申请

WO02091700A3 DYNAMIC PACKET FILTER UTILIZING SESSION TRACKING 审中-公开
标题翻译：动态包装过滤器利用会话追踪
公开(公告)号：WO02091700A3
公开(公告)日：2003-02-06
申请号：PCT/IB0201603
申请日：2002-05-10
申请人： PACKET TECHNOLOGIES LTS
发明人： GOLDBERG RONEN , DANIELY GADY , ZEZAK MOSHE , SHOHAT DRORY
IPC分类号： G06F21/20 , G06F13/00 , H04L12/66 , H04L29/06
CPC分类号： H04L63/0254
摘要： A novel and useful dynamic packet filter that can be incorporated in an hardware based firewall suitable for use in portable computing devices such as cellular telephones and wireless connected PDAs that are adapted to connect to the Internet. The invention performs dynamic packet filtering on packets received over an input packet stream. The dynamic filter cheeks dynamic protocol behaviour using information extracted from the received packet. Sessions are created and stored in a session database to track the state of communications between the source and destination. Recognition of a session is accelerated by use of a hash table to quickly determine the corresponding session record in the session database. Session related data is read from the session database and the received packet is checked against a set of rules for determination of whether to allow or deny the packet.
摘要翻译：一种新颖且有用的动态分组过滤器，其可以并入适用于适于连接到因特网的便携式计算设备（例如蜂窝电话和无线连接PDA）的基于硬件的防火墙。本发明对通过输入分组流接收的分组执行动态分组过滤。动态过滤器使用从接收到的数据包中提取的信息来表示动态协议行为。会话被创建并存储在会话数据库中以跟踪源和目的地之间的通信状态。通过使用哈希表来快速确定会话数据库中的对应会话记录来加速对会话的识别。从会话数据库中读取会话相关数据，并根据一组规则检查接收到的数据包，以确定是否允许或拒绝数据包。

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