IPS Signatures

Net Flood UDP

 
Signature ID: 6910/0
Original Release:S4
Release:S573 (download)
Original Release Date:2001 July 25
Latest Release Date:2011 June 13
Default Enabled:False
Default Retired:True
Alarm Severity:Informational
Fidelity:100 

Description

This signature fires when a configurable threshold for all UDP traffic is crossed. The level of all UDP traffic is monitored for any sudden increases to detect possible denial-of-service attack conditions.This signature is disabled by default. In order to properly utilize this signature, it must be put into "diagnostic" mode. This is done by enabling the signature, setting the "Rate" parameter to zero, and letting the sensor operate for a period of time. While in "diagnostic" mode, alarms will be generated with the current rate of all UDP traffic. Using these rates, a threshold should be chosen to indicate when the level of all UDP traffic is no longer within the acceptable range for the network being monitored. After the threshold is determined, it should be used as the value of "Rate" parameter for this signature.Note: This signature should not be left in "diagnostic" mode for permanent operation due to the performance overhead created by monitoring traffic rates.

Recommended Filter

No recommended filters.

Benign Triggers

No known triggers.

IntelliShield Alerts

IntelliShield ID Headline VersionCVSS ScoreLast Published
1349ICMP Traffic and Network Flooding Issue12007 May 01 03:06 GMT
28815Cisco IOS XE Software L2TP Traffic Denial of Service Vulnerability 17.8/6.42013 April 10 16:21 GMT

Download

To download this and other IPS update files, please go to Cisco Secure Software Download.

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