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Detecting unauthorized network communication

  • US 5,798,706 A
  • Filed: 06/18/1996
  • Issued: 08/25/1998
  • Est. Priority Date: 06/18/1996
  • Status: Expired due to Term
First Claim
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1. A method for use with devices that are coupled by a communication medium to form an internal packet network, at least one of the devices not being an authorized conduit for communication with external devices that are not part of the internal packet network, the method comprisingobserving packets passing on the medium,based on the observation, detecting packets that pass between the internal packet network and one of the external devices via one of the devices that is part of the internal network, andfor detected packets associated with communication with the external device, determining if the one device via which the packets pass is an authorized conduit for communication with external devices.

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