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    • 5. 发明申请
    • METHOD AND SYSTEM FOR FILTERING PACKETS WITHIN A TUNNEL
    • 用于在隧道内过滤分组的方法和系统
    • WO2007100542A2
    • 2007-09-07
    • PCT/US2007/004328
    • 2007-02-21
    • COMPUTER ASSOCIATES THINK, INC.GASSOWAY, Paul, A.
    • GASSOWAY, Paul, A.
    • H04L63/0245
    • A system for filtering packets includes a first router, a second router, and a packet filter. The first router encapsulates a packet and transmits the encapsulated packet to the packet filter through a first tunnel. The packet filter receives the encapsulated packet through the first tunnel and de-encapsulates the encapsulated packet. The packet filter then determines whether the de-encapsulated packet is undesirable and, in response to determining that the de-encapsulated packet is not undesirable, encapsulates the de- encapsulated packet and transmits the encapsulated-not-undesirable packet to a second router through a second tunnel. The second router receives the encapsulated-not- undesirable packet from the second tunnel and de-encapsulates the encapsulated-not- undesirable packet.
    • 用于过滤分组的系统包括第一路由器,第二路由器和分组过滤器。 第一路由器封装分组并且通过第一隧道将封装的分组发送到分组过滤器。 分组过滤器通过第一隧道接收封装的分组并解封装封装的分组。 分组过滤器然后确定解封装的分组是否是不合需要的,并且响应于确定解封装分组不是不合需要的,封装解封装的分组并且将封装的非不合需要的分组通过 第二隧道。 第二路由器从第二隧道接收封装的非有害分组并且解封装封装的非有害分组。