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Quake client killer

daemon@ATHENA.MIT.EDU (Tim Fletcher)
Thu Feb 18 18:19:58 1999

Date: 	Tue, 16 Feb 1999 21:25:47 +0000
Reply-To: Tim Fletcher <tim@NIGHT-SHADE.DEMON.CO.UK>
From: Tim Fletcher <tim@NIGHT-SHADE.DEMON.CO.UK>
To: BUGTRAQ@NETSPACE.ORG
In-Reply-To:  <Pine.LNX.4.05.9902151450270.667-100000@www.interactivealien.com>

Not sure if this is news but I have found a way to take down remote quake
clients (Win95) very simply with little evidence left behind. Basicly you
write a few hundred k of data to one of the udp listening ports and
quake dies and up pops a little dialog box saying:

A network error has occured

I found this over the weekend while admining a small LAN party were
everything worked too well so I got bored hence tried out of curiousity
this:

dd if=/dev/zero | nc -u client 27501

I haven't tried this on NT / Linux / Other clients or games, it appers
on Win98 and Win95 and has no effect on servers that I can tell, thou
nothing is logged.

I wonder if the effect only appers if done from the server because I
didn't have time to try much out and the normal connection for quake is

client:27001 -> server:27500

And I was working on the server.

      Tim Fletcher                  .~.
                                    /V\       L   I   N   U   X
   tjdf@st-andrews.ac.uk           // \\  >Don't fear the penguin<
tim@night-shade.demon.co.uk       /(   )\
                                   ^^-^^

Justice is incidental to law and order.
                -- J. Edgar Hoover

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