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Thwarting denial of service attacks originating in a DOCSIS-compliant cable network

  • US 7,372,809 B2
  • Filed: 05/18/2004
  • Issued: 05/13/2008
  • Est. Priority Date: 05/18/2004
  • Status: Active Grant
First Claim
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1. A method for thwarting a denial of service attack originating from a DOCSIS-compliant cable network (DCN) comprising:

  • detecting transmission of a packet used to perpetrate a denial of service attack against a target originating from a customer premises equipment (CPE) connected to the DNS;

    capturing a source IP address of the CPE and a domain name of the target from the attack packet; and

    directing a DNS cache server to ignore a domain name request from the CPE comprising the source IP address and the target domain name, wherein the DNS cache server is used to thwart the denial of service attack directed to the target domain name from the CPE.

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