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Methods and systems for firewalling virtual private networks

  • US 7,533,409 B2
  • Filed: 01/16/2003
  • Issued: 05/12/2009
  • Est. Priority Date: 03/22/2001
  • Status: Expired due to Term
First Claim
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1. A method, comprising the steps of:

  • receiving a first packet from a first network;

    identifying in the first packet information for routing the first packet;

    detecting a second packet encapsulated within the first packet based on a first set of rules for processing the first packet and the information for routing the first packet;

    identifying in the first packet information for routing the second packet;

    determining an index based on the information for routing the second packet;

    determining a second set of rules for processing the second packet based on the index and the information for routing the second packet; and

    filtering the second packet based on the index, the second set of rules, and the information for routing the second packet.

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