Traversing firewalls and nats

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United States of America Patent

SERIAL NO

10450751

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An incoming UDP packet is allowed to traverse a network address translation (NAT) device or a firewall, wherein first, a TCP connection is opened and a Raw-IP interface is utilized to build the UDP-like packet using the parameters of the TCP connection (e.g., session number, port, etc.) Furthermore, when one of two communicating machines is behind a firewall, a connection is established between each of the machines and a proxy server located in a public network. The proxy then communicates the port and address information while using the proxy server's port and address information as the source port and address, or provides both with an address of an appropriate (potentially based on network proximity) packet forwarder.

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Patent Owner(s)

Patent OwnerAddress
VOCALTEC COMMUNICATIONS LTD46733 HERZLIA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kimchi, Gur Bellevue, WA 228 8027

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