NETWORK FIREWALL AND NAT TRAVERSAL FOR TCP AND RELATED PROTOCOLS
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United States of America Patent
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Issued Date -
Sep 8, 2011
app pub date -
Mar 4, 2011
filing date -
Mar 5, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A message passing protocol allows two clients to establish a connection even when the clients are behind different NAT devices such as NAT firewalls. Beneficially, the protocol does not require that either client has knowledge of where the other client is located (e.g., behind the same NAT device or behind a different NAT device). When two clients want to establish a connection, the clients exchange identifying information with each other by passing the information through a rendezvous server. Based on the identifying information, each client determines and sends a plurality of synchronization packets to a number of different predicted addresses. When synchronization packets reach the actual addresses of both devices, a connection can be established between the clients.
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