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Assigning a source address to a data packet based on the destination of the data packet

  • US 7,120,701 B2
  • Filed: 02/22/2001
  • Issued: 10/10/2006
  • Est. Priority Date: 02/22/2001
  • Status: Expired due to Fees
First Claim
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1. In a network having public and private realms separated by an interface device, a method performed by a client on the private realm for use in sending a data packet through the network, the method comprising:

  • determining, before an application running on the client finishes building the data packet to be sent, if a destination address of the data packet corresponds to the private realm or to the public realm;

    retrieving, before the application running on the client finishes building the data packet to be sent, a public address of the interface device that is addressable from the public realm if the destination address corresponds to the public realm;

    retrieving, before the application running on the client finishes building the data packet to be sent, a private address of the client that is addressable from the private realm if the destination address corresponds to the private realm;

    assigning, before the application running on the client finishes building the data packet to be sent, a retrieved address to be the source address of the data packet; and

    the method further comprising;

    installing a software module on the client; and

    binding the software module to the public address of the interface device;

    wherein the public address of the interface device is retrieved via the software module.

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