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Mechanism for implementing Voice Over IP telephony behind network firewalls

  • US 7,009,984 B2
  • Filed: 10/24/2003
  • Issued: 03/07/2006
  • Est. Priority Date: 06/06/2002
  • Status: Expired due to Fees
First Claim
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1. A network comprising:

  • one or more stations implementing a Voice Over Internet Protocol (VOIP);

    a network firewall coupled to a first station; and

    a public proxy/gatekeeper (PPG), coupled to the firewall, including;

    a masquerade module to translate private IP addresses received from each of the one or more stations to a public address associated with a private network to which the one or more stations are coupled by comparing a private IP address embedded within a data portion of each received packet to a source IP address in a header of each received packet and masquerading the private IP address if the embedded private IP.

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