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System and method for very fast IP packet filtering

  • US 6,301,669 B2
  • Filed: 11/29/2000
  • Issued: 10/09/2001
  • Est. Priority Date: 08/17/1998
  • Status: Expired due to Fees
First Claim
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1. A method of compiling filtering rules into sets of binary symbolic and image files comprising the steps of:

  • expanding a primary file and N secondary included files to produce an expanded in-memory rule table including one or more source filter rules;

    reading source filter rules from said in-memory rule table;

    recognizing a plurality of physical interfaces that are targets for said source filter rules;

    for said physical interfaces that are non-dynamic, generating binary image rule output files; and

    for said physical interfaces that are dynamic, generating binary symbolic rule output files.

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