full-disclosure - Port 6881 scans

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Message-ID: <3F73681D.9090300@thievco.com>
From: BlueBoar at thievco.com (Blue Boar)
Subject: Port 6881 scans - why?

Paul Johnson wrote:

> Am getting a Distributed (several diverse net blocks) and fair quantity
> (100 packets per min. per IP) of port 6881 hits...
> 
> Any idea what this is (other than possibly BT - Snark  - per google)...
> No I have not run / analysis with a sniffer...  Currently hitting the
> FW...

TCP, I assume?

It probably IS BitTorrent.  If any of the users behind your firewall are 
trying to use BitTorrent, then that would cause outside people to try to 
hit port 6881 on your outside interface.  Check for DST TCP 6881-6889 going 
from the inside to the outside, that would be your BT user, if that's what 
it is.

					BB