Traversing firewalls and nats
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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app pub date -
Sep 30, 2004
filing date -
May 26, 2000
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Abandoned
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Abstract
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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