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Traversal of symmetric network address translator for multiple simultaneous connections

  • US 8,930,545 B2
  • Filed: 09/01/2011
  • Issued: 01/06/2015
  • 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) receiving at the first node a provisional response to a connection request message sent to a second node, wherein the connection request message contains a list of predicted transport addresses;

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

    c) delaying port prediction for communication between the first node and a third node until after the check of connectivity between the first node and the second node has begun.

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