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Method, a Device, and a System for Protecting a Server Against Denial of DNS Service Attacks

  • US 20080028073A1
  • Filed: 07/08/2005
  • Published: 01/31/2008
  • Est. Priority Date: 07/09/2004
  • Status: Abandoned Application
First Claim
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1. A method of protecting a server (10, 18) against denial of DNS service attacks, comprising:

  • detecting (100, 102, 104) denial of DNS service attacks targeting the server; and

    intercepting (110) data packets addressed to the server;

    the method being characterized by interrupting (116) the transmission of an intercepted data packet to the server if the intercepted packet has a transaction number that is not in a list of transaction numbers of requests sent by the server.

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