[unisog] another round of bogus DMCA notices

Michael Holstein michael.holstein at csuohio.edu
Tue Oct 31 17:24:35 GMT 2006

> What do you mean by "bogus" or "non-existent?"  If the IP addresses
> are valid within your netblocks, but are just not active at the time
> you look (or you are just doing "ping IP-ADDRESS" to verify, I
> would assume some clever miscreant has simply decided to start
> doing short-lived IP aliasing, firewalling, or something else
> designed to make verification of piracy harder.  You may have
> to start logging traffic across your border to verify the claim.

I do log all the traffic (pix doing debug logging + argus behind that). 
I also log all the DHCP traffic, and Ciscoworks polls the switches 
several times a day, all of which gets put into a database.

On the day in question (as well as several before and after) I have no 
argus records of any successful connections in/out (just a few inbound 
TIM missses on ports that are open into that net but didn't find the 
host). I also don't have any traffic on the PIX, except for a bunch of 
UDP denies (which interestingly, do reflect eDonkey traffic -- the 
protocol specified in the complaint).

Since I already know that Mediasentry (et.al) do not ever actually 
connect to the host to verify it's really presenting a copy of the 
purported pirate work -- they just scrape the directory -- I assume some 
clever person (maybe the same folks that seed bad files) is poisoning 
the directory with bad information.


Michael Holstein CISSP GCIA
Information Security Administrator
Cleveland State University

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