Threat Level: green Handler on Duty: Jan Kopriva

SANS ISC: UDP/4081 Spike - SANS Internet Storm Center SANS ISC InfoSec Forums

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UDP/4081 Spike
A diary-reader, Ned, reports a spike in UDP/4081 activity.  The reported source is located in China.  He did not have any captured packets, just firewall logs.  I'm 95% certain that this is messenger/pop-up spam.  I'd like to task the informal network Echelon system we have (in the form of our readers) to see if anyone can confirm this guess with a captured packet.
Kevin Liston

292 Posts
ISC Handler
Nov 11th 2006

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