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System and method for establishing a virtual private network

  • US 7,757,074 B2
  • Filed: 01/24/2005
  • Issued: 07/13/2010
  • Est. Priority Date: 06/30/2004
  • Status: Active Grant
First Claim
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1. A method for establishing an encrypted virtual private network between a client and a private data communication network, wherein the client is connected to the private data communication network via a public data communication network, comprising:

  • establishing an encrypted data communication session with a client over the public data communication network; and

    sending a programming component to the client for automatic installation and execution thereon in response to establishment of the encrypted data communication session;

    wherein upon execution the programming component installs a device driver in a network stack of the client, the device driver configured to intercept communications from client applications destined for resources on the private data communication network and to send the intercepted communications to the programming component, the programming component encapsulating payload from the intercepted communications and sending the encapsulated payload to a gateway via the encrypted data communication session instead of to the resources on the private data communication network.

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