06131163 is referenced by 217 patents and cites 11 patents.

A system for a network gateway that provides computer data security using a protocol stack proxy is disclosed. The system evaluates data that arrives at a computer system that is executing a network operating system. The system comprises a protocol stack proxy, coupled between a device driver on the computer system that is configured to receive the data from a network and deliver the data according to a first protocol associated with a first network layer, and one or more components of the network operating system that receive packets according to the first protocol. The protocol stack proxy has one or more protocol proxy layers configured to (A) receive the data from the device driver; (B) pass the data to a second network layer that is higher than the first network layer; (C) evaluate the data to determine whether the data satisfies a predetermined criteria; and (D) if the data satisfies the predetermined criteria, to (D1) pass the data to the first network layer, and (D2) transmit the data to the one or more components to the network operating system.

Title
Network gateway mechanism having a protocol stack proxy
Application Number
9/24941
Publication Number
6131163
Application Date
February 17, 1998
Publication Date
October 10, 2000
Inventor
Scott L Wiegel
San Jose
CA, US
Agent
Hickman Palermo Truong & Becker
Agent
Christopher J Palermo
Assignee
Cisco Technology
CA, US
IPC
G06F 12/14
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