Network manager SNMP trap suppression

Details Network manager SNMP trap suppression Network manager SNMP trap suppression

2007-08-28

2007-08-28

Coulter, Kenneth R. (Department: 2141)

Electrical computers and digital processing systems: multicomput

Computer network managing

Computer network monitoring

C726S022000, C709S223000

Reexamination Certificate

active

10411263

ABSTRACT:
Methods and apparatus for controllably suppressing, at a network management system, SNMP event trap messages received from network nodes in a communications network are presented. The rate at which the traps are received from the network nodes is monitored and if the rate exceeds a threshold all subsequent traps received over a set time interval are not processed. The rate is calculated by counting received event traps over a time interval which is either preset or programmed. After the set time interval has passed all newly received traps are monitored. Information regarding traps received during the set time interval may be logged. Additionally, nodes from which excessive traps are received and indicating an event such as a Denial of Service (DoS) attack, are identified so that remedial action can be taken.

REFERENCES:
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patent: 2003/0061514 (2003-03-01), Bardsley et al.
patent: 2003/0110396 (2003-06-01), Lewis et al.
patent: 2005/0210533 (2005-09-01), Copeland et al.
Guofei Jiang et al.; Multiple Vulnerabilities in SNMP; Computer; vol. 35, Issue 4; pp. 2-4; Apr. 2002.
Nortel-Networks Portfolio Summary in response to CERT SNMP Vulnerabilities (Advisory CA-2002-03); Version 1.0; Feb. 18, 2002.
Alex Woodie; Help/Systems Releases SNMP Trapper for OS/400; IT Jungle Newsletter; vol. 2, No. 9; Mar. 5, 2002.

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