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Switching network employing a user challenge mechanism to counter denial of service attacks

  • US 8,259,727 B2
  • Filed: 06/28/2010
  • Issued: 09/04/2012
  • Est. Priority Date: 05/05/2006
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • storage to contain a plurality of templates and data pertaining to prior traffic on a network, the plurality of templates including at least a primary template and a secondary template; and

    a processing circuitry coupled to the storage to compare packet traffic on the network with the primary template and the prior traffic data, to identify a possibility of a service attack based on an unusually high frequency of packet traffic on the network that match the primary template, compare the unusually high frequency of packet traffic that match the secondary template after matching the primary template, and to trigger a service function by causing a challenge to be sent to a respective client device coupled to the network when the unusually high frequency of packet traffic match both the primary template and the secondary template, wherein the processing circuitry and the storage to operate in an intermediate node to monitor traffic between a server and a plurality of client devices to identify the service attack.

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