Establishment of a secure communication link based on a domain name service (DNS) request

CAFC
  • US 7,490,151 B2
  • Filed: 09/30/2002
  • Issued: 02/10/2009
  • Est. Priority Date: 10/30/1998
  • Status: Active Grant
First Claim
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1. A data processing device, comprising memory storing a domain name server (DNS) proxy module that intercepts DNS requests sent by a client and, for each intercepted DNS request, performs the steps of:

  • (i) determining whether the intercepted DNS request corresponds to a secure server;

    (ii) when the intercepted DNS request does not correspond to a secure server, forwarding the DNS request to a DNS function that returns an IP address of a nonsecure computer, and(iii) when the intercepted DNS request corresponds to a secure server, automatically initiating an encrypted channel between the client and the secure server.

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