Internet protocol filter

Details Internet protocol filter Internet protocol filter

1997-04-24

2000-10-03

Patel, Ajit

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

370390, 370401, 713201, H04L 1256

Patent

active

061282987

ABSTRACT:
The IP filter, embodying the present invention, is a communications device designed to provide public network or Internet access to nodes of private networks, advantageously without requiring the private nodes on such networks to register public Internet addresses. The IP filter presents a single IP address to the Internet and uses a plurality of IP ports to solve the problem of IP address conservation. It initiates sessions by assigning private side IP sessions to a unique port of the IP filter's public address. The IP filter effects a translation between a source port number for the private network and a destination port number for the public network for communication therebetween. Benefits of the IP filter include private node security and conservation of Internet-registered addresses.

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