Patent ID: 7630364
Filing Date: 2009-12-08
Classification: H04L

Abstract:
1. A method, comprising: receiving, at a network address translation (NAT) device that is logically coupled between a source node and a destination node in a telecommunication network, a transport layer protocol initialization packet indicating initiation of a new association; creating and storing, for the new association, an internal source tag, an internal destination tag, an external source tag, and an external destination tag; setting the external destination tag to a first destination value carried in the initialization packet; forwarding the initialization packet toward the destination node; receiving an initialization acknowledgment message; setting the external source tag to a second destination value carried in the initialization acknowledgment message; forwarding the initialization acknowledgment message toward the source node; and only after receiving a completion acknowledgment message from the destination node, setting the internal source tag equal to the external source tag, and setting the internal destination tag equal to the external destination tag.