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Multiple network connections from a single PPP link with network address translation

  • US 7,443,865 B1
  • Filed: 04/04/2002
  • Issued: 10/28/2008
  • Est. Priority Date: 04/04/2002
  • Status: Active Grant
First Claim
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1. A method for communications routing in a system in which a user is simultaneously connected to a first network and a second network, the method comprising:

  • receiving a packet sent from the user;

    examining the packet to determine if its destination is the first network or the second network, the examining further comprising;

    extracting a destination network address from the packet;

    looking up the destination network address in a routing table;

    determining that the destination is the first or second network based upon the listing for the destination network address in the routing table; and

    determining that the destination is the first or second network based on a default setting if the destination network address is not listed in the routing table;

    performing network address translation on the packet generating a translated packet; and

    forwarding the translated packet to the first network or the second network, depending upon the packet'"'"'s destination.

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