Security Incidents mailing list archives
Re: UDP Port Sweep question
From: Kyle Maxwell <krmaxwell () gmail com>
Date: Wed, 29 Dec 2004 08:44:16 -0600
On Tue, 28 Dec 2004 22:31:14 -0000 (GMT), Billy Dodson <CraftedPacket () securitynerds org> wrote:
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 traffic 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.
My first thought would be that they may have some sort of internal application or appliance that talks to IBM in some way. What ports are involved (destination and source)? Is it possibly DNS traffic? Are the network numbers similar in any way to your clients (ie someone has a typo somewhere)? -- Kyle Maxwell [krmaxwell () gmail com]
Current thread:
- UDP Port Sweep question Billy Dodson (Dec 28)
- Re: UDP Port Sweep question Tim (Dec 29)
- Re: UDP Port Sweep question Kyle Maxwell (Dec 29)
- Re: UDP Port Sweep question Ron (Dec 29)
- <Possible follow-ups>
- Re: UDP Port Sweep question Don Parker (Dec 29)
- RE: UDP Port Sweep question Billy Dodson (Dec 29)
- RE: UDP Port Sweep question David Gillett (Dec 29)
- Re: UDP Port Sweep question Tim (Dec 29)
- RE: UDP Port Sweep question Jack McCarthy (Dec 29)
- RE: UDP Port Sweep question Benjamin Franz (Dec 29)
- RE: UDP Port Sweep question Colby DeRodeff (Dec 29)
- Re: UDP Port Sweep question Francesca Smith (Dec 30)