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Firewall for filtering tunneled data packets

  • US 20030115328A1
  • Filed: 11/22/2002
  • Published: 06/19/2003
  • Est. Priority Date: 11/29/2001
  • Status: Active Grant
First Claim
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1. A method of filtering a data packet, comprising receiving a tunneled data packet comprising an outer header and an outer payload, the outer payload comprising an inner data packet comprising an inner header and an inner payload, matching the value of at least one outer header field of the tunneled data packet to a first rule, and taking the action defined in the first rule comprising detecting the inner data packet within the tunneled data packet, matching the value of at least one field of the inner data packet to a second rule, and taking the action defined in the second rule.

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