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Symmetric network address translation system using stun technique and method for implementing the same

  • US 20070189311A1
  • Filed: 12/27/2006
  • Published: 08/16/2007
  • Est. Priority Date: 02/13/2006
  • Status: Active Grant
First Claim
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1. A private network using a network address translation (NAT) technique, comprising:

  • a Simple Traversal of UDP over NAT (STUN) server for transmitting to a private network terminal a public Internet Protocol (IP) address and first port information of a router requested by the private network terminal for setting up a session with an external network terminal;

    wherein the private network terminal transmits a session setup request message, including the public IP address and the first port information of the router for setting up the session with the external network terminal, through its private IP address and a second port; and

    wherein the router extracts and stores the first port information of the router and the private IP address and the second port of the private network terminal from the session setup request message, and forwards a packet received through the first port to the private network terminal through the private IP address and the second port using the stored information.

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