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Re: UDP Port Sweep question

From: Don Parker (dparkerbridonsecurity.com)
Date: Tue Dec 28 2004 - 17:12:09 CST

Hello Billy,

Might I suggest you post some of the packets here? It is hard to make judgement
calls without something to look at. Just sanitize the ip's prior to posting the



Don Parker, GCIA GCIH
Intrusion Detection & Incident Handling Specialist
Bridon Security & Training Services
voice: 1-613-302-2910

On Tue, 28 Dec 2004 22:31 , 'Billy Dodson' <CraftedPacketsecuritynerds.org> sent:

>I monitor 3 different sensors which are continuously pounded with network
>reconnaissance of all types. These sensors all belong to financial
>institutions. One thing that jumped out at me are "UDP Port Sweeps"
>events from about 15 different IP addresses which all belong to either IBM
>or Sequent (which was bought by IBM). I see these same IP addresses doing
>the same thing on all three sensors. I have contacted the clients and
>they do not deal with IBM or Sequent in any way. Are there legitimate type
>that would cause these events to fire? It is odd to me that I see them on
>all 3 sensors for 3 different companies but all happen to be in the
>financial industry. Thanks in advance for your input.