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managing a SYN flood
From: "Bruyere, Michel" <mbruyere () ezemcanada com>
Date: Thu, 4 Mar 2004 09:04:49 -0500

Hi, 
        I know someone that is running a public Game server. He's actually
facing a DDOS SYN flood by a player that has been banned from the server
because of rules violation.

I would like to know if you guys can point me to a good paper on how to
mitigate the effect of the attack in order to be able to keep the system up.
I don't have physical access to the server and I tried to help him out the
best as I could but it would be easier to send him a good paper on the
subject.

BTW the server is in co-location on a 100mbits link and is running 2k
server. I helped him to harden the server a little bit since it was WIDE
open to the net. I also gave him the following article to help Windows a bit

http://support.microsoft.com/default.aspx?scid=kb;en-us;142641&Product=win20
00

http://support.microsoft.com/default.aspx?scid=kb;en-us;315669&Product=win20
00

It helped somewhat but the server is still unable to deal with the flood.

If you want more info ill be glad to give it out.

Thx for your inputs 



M.Bruyere
Network/systems administrator
CompTIA A+, Network+



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