Security system for preventing unauthorized communications betwe

Details Security system for preventing unauthorized communications betwe Security system for preventing unauthorized communications betwe

1994-12-07

1996-08-27

Lee, Thomas C.

Multiplex communications

Wide area network

Packet switching

39518701, 370 941, 380 49, 3642222, 3642225, 3642843, 364DIG1, G06F 1300

Patent

active

055509843

ABSTRACT:
A security system for connecting a first computer network to a second computer network is provided. The security device has a pair of computer motherboards, each of which has a network interface adapter for receiving and transferring communications from a computer network to a transfer adapter to be transmitted to the other computer network through a transfer adapter and network interface adapter provided on the other computer motherboard. Each motherboard provides protocol translation from a first protocol to a second protocol and removes source and destination address information from communications transferred to the other computer motherboard. Application program interface shim software or dynamic link library software provides control of communications between the two motherboards for passing code necessary to request and receive services from the other computer network.

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"Network Firewalls", by Bellovin et al., IEEE Communications Magazine, Sep. 1994, pp. 50-57.

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