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EP0493892A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Intrusion detection apparatus for local area network

Assignee: AT&T Inc
•
Filing: 1991-12-05
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Granted: —
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Expires: 2011-12-05
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Abstract

Abstract Intrusion detection is afforded for local area networks by including one or more intelligent hub units connected to the stations in the network. The intelligent hub unit maintains a list of codes identifying those stations and units connected locally to ports of the intelligent hub unit. When a station initiates a message on the network, a source identifier code unique to the sending station is incorporated in the message as specified by the standard access protocol. At the intelligent hub unit, the source identifier code is recovered from the received message and the port at which the message was received is identified. The received source identifier code is compared with the particular entry in the stored list of codes corresponding to the identified port. If the comparisons fail to generate a matching condition between the source identifier and the particular entry in the list of codes, then the intelligent hub unit generates an alarm indicative of an intrusion on the network.

Inventors

  • 👤 William L. Aranguren
  • 👤 Richard G. Bantel
  • 👤 Jonathan L. Howard
  • 👤 Carlton J. Hunt

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 10:44
CPC Classifications
H; H04; H04L; H04L63/00; H04L63/14; H04L63/1408; H04L63/1416; H04L12/00; H04L12/02; H04L12/22

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 134 words
Hub arrangement for providing security on a local area network in which a plurality of stations are interconnected, the arrangement comprising, a plurality of ports for connecting the plurality of stations to the hub arrangement, means for storing a plurality of source identifiers, each source identifier referenced to a unique location of the individual port to which the individual station is connected, means for determining location of one active port of the plurality of ports in response to a message received by the port, means responsive to the message activity for extracting a transmitted source identifier from the message, means for comparing the transmitted source identifier to the stored source identifier corresponding to the active port location to generate an alarm indication when the transmitted source identifier fails to match the stored source identifier.
Claim 2
Dependent Claim 24 words
The hub arrangement as defined in claim 1 further comprising means responsive to the alarm indication for disabling message activity from the active port.
Claim 3
Dependent Claim 16 words
The hub arrangement as defined in claim 1 further comprising means for suppressing the alarm indication.
Claim 4
Dependent Claim 136 words
Hub arrangement for providing security on a local area network in which a plurality of stations are interconnected, the arrangement comprising, a plurality of ports for connecting the plurality of stations to the hub arrangement, means for storing a plurality of source identifiers, each source identifier referenced to a unique location of the individual port to which the individual station is connected, means for determining location of one active port of the plurality of ports in response to a message received by the port, means responsive to the message for extracting a transmitted source identifier from the message, means for comparing the transmitted source identifier to the stored source identifier corresponding to the active port location to alter message activity from the active port when the transmitted source identifier fails to match the stored source identifier.
Claim 5
Dependent Claim 24 words
The hub arrangement as defined in claim 4 further comprising means responsive to the alarm indication for disabling message activity from the active port.
Claim 6
Dependent Claim 16 words
The hub arrangement as defined in claim 4 further comprising means for suppressing the alarm indication.

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