Receiving port security in a network concentrator

Patent 5537099 Issued on July 16, 1996. Estimated Expiration Date:

May 18, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Message communication system with message storage
Patent #: 4383257
Issued on: 05/10/1983
Inventor: Giallanza , et al.

Interconnection of communications networks
Patent #: 4627052
Issued on: 12/02/1986
Inventor: Hoare , et al.

Protector system for computer access and use
Patent #: 4672572
Issued on: 06/09/1987
Inventor: Alsberg

Reliable local data network arrangement
Patent #: 4692918
Issued on: 09/08/1987
Inventor: Elliott , et al.

Mechanism for joining a carrier tape cover to a base stip
Patent #: 4897074
Issued on: 01/30/1990
Inventor: Knight

Data transmission security arrangement for a plurality of data stations sharing access to a communication network
Patent #: 4901348
Issued on: 02/13/1990
Inventor: Nichols, et al.

Netbios name authentication
Patent #: 4930159
Issued on: 05/29/1990
Inventor: Kravitz, et al.

Computer with improved keyboard password functions
Patent #: 4942606
Issued on: 07/17/1990
Inventor: Kaiser, et al.

Pass-through and isolation switch
Patent #: 4974190
Issued on: 11/27/1990
Inventor: Curtis

Method and apparatus for providing access control in a secure operating system
Patent #: 5113442
Issued on: 05/12/1992
Inventor: Moir

More ...

Inventor

Liang, Chao-Yu

Assignee

Bay Networks, Inc.

Application

No. 245812 filed on 05/18/1994

US Classes:

340/5.74, Access to electrical information370/241, DIAGNOSTIC TESTING (OTHER THAN SYNCHRONIZATION)370/407Interconnected star couplers

Examiners

Primary: Zimmerman, Brian

Foreign Patent References

10431751 EP. 06/13/1991
59-63839 JP. 04/13/1984

International Class

H04Q 001/00

Abstract

A method and apparatus for preventing intrusive access to a network. The method and apparatus are implemented in a network having a star topology. Utilizing a network management module of a network concentrator as a centralized functional base, unauthorized Data Terminal Elements (DTEs) may be prevented from transmitting messages on a network. By providing a centrally located means by which a set of unique DTE addresses can be associated with a particular port on the network concentrator, valid DTE addresses can be associated with a message packet that contains the address of the transmitting DTE. If the DTE address matches those associated with the port from which it was received, the message packet is authorized. If the DTE address does not match those addresses associated with from which it was received, the message packet is unauthorized. When an unauthorized message packet is received, the port from which the frame was received, is partitioned. The centralized approach utilizing a network manager as a functional base has certain advantages in comparison to distributed security implementations. Such advantages include lower cost and the ease of using existing network management functionality.

Other References

Brain P. Schanning, "Secure Relays: An Alternative Approach to LANSEC™, Lecture Notes in Computer Science, Local Area Network Security, Workshop LANSEC'89", European Institute for System Securtiy (E.I.S.S.), Karlsruhe, FRG, Apr. 3-6, 1989 Proceedings, pp. 32-45
Kwok, C. K. and Mukherjee, B., On Transparent Bridging of CSMA/CD Networks, IEEE, Nov., 1989, pp. 185-190 and, especially paragraph 2 and paragraph 4.3
Weinstein, J., Bridging to a better LAN, Mini Micro Systems, vol. XXII, No. 2, Feb., 1989, pp. 86-88 and, especially, p. 87, line 12, and p. 88, left-hand column, line 6
Tanenbaum A. S., Computer Networks, second edition, Prentice-Hall, Inc., 1988, including the table of contents and pp. 128-168
Meijer, A. and Peters, P., Computer Network Architectures, Computer Science Press, 1983, including the table of contents and pp. 280-283
Michael S. Katzman, "Smart from the Start: An Introduction to the New AT&T StarLAN 10 SmartHUB and SmartHUB Manager" pp. 22-28, LAN Dispatch/Spring 199