Snort mailing list archives
RE: Odd traffic from Windows 2K servers
From: Rich Adamson <radamson () routers com>
Date: Thu, 11 Oct 2001 11:32:01 -0600
Ed, My company (Network Partners Inc) has been doing network health checks and vulnerability analysis for about seven years in over forty states. We are very heavy into protocol analysis, network performance, security, etc. I've only seen one case similar to what you've described, and that was a company in Omaha that hired a not-so-informed programmer to write a special application for them. The programmer wrote the app to communicate with another Windows app (on the same box). It was generating a fair amount of LAN traffic destined for itself as observed with a NAI Sniffer. Once the detail was analyzed, the company recognized the issue and we left. I did not get to see the source code or even begin to understand what he did that created the issue. Ordinarily the stack would not ship that type of data on the wire. If you have full access to the box, one brute-force mechanism to use to identify the source is to simply kill processes one at a time through task manager to identify the errant app (assuming all other avenues have been attempted). I'd suspect there is more to the story then what we understand thus far. Rich
My question is still: Has anyone seen behaviour before where a Windows box will send UDP traffic to _itself_? If so, what was the cause (since Technet, Google, etc. turn up nothing) and the cure? If not, does anyone have any suggestions? (Other than ripping them out and replacing with UNIX - already been there with the PHB's.)
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Current thread:
- Odd traffic from Windows 2K servers Vazquez, Ed (Oct 10)
- RE: Odd traffic from Windows 2K servers Michael Steele (Oct 12)
- <Possible follow-ups>
- RE: Odd traffic from Windows 2K servers Vazquez, Ed (Oct 11)
- RE: Odd traffic from Windows 2K servers Rich Adamson (Oct 11)