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Traversal of symmetric network address translator for multiple simultaneous connections

  • US 8,015,300 B2
  • Filed: 10/22/2010
  • Issued: 09/06/2011
  • Est. Priority Date: 03/05/2008
  • Status: Active Grant
First Claim
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1. A method for peer-to-peer connection over a network between a first node behind a first symmetric network address translator (NAT) and two or more other nodes, the method comprising:

  • a) sending a connection request message containing a list of predicted transport addresses from the first node to a second node;

    b) receiving a provisional response to the connection request message at the first node;

    c) performing a check of connectivity between the first node and the second node using the list of predicted transport addresses; and

    d) delaying port prediction for communication between the first node and a third node until after c) has begun.

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