I wrote a plugin to do something similar for my own servers.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Nephyrin Zey
Sent: Saturday, September 05, 2009 2:44 PM
To: Half-Life dedicated Win32 server mailing list
Subject: Re: [hlds] TF2 DDOS AS2_INFO attack

On 09/05/2009 02:28 PM, Shizzle Nizzle wrote:
> can you explain how you went about fixing this nephyrin or provide more
> details?
>    

Daemon responds to queries using information retrieved from the server 
~once/second. iptables captures incoming server queries and redirects 
them to daemon, daemon responds using real server's IP/port to avoid 
confusing requester.

Right now I have one daemon per server, each looks like it's getting 
exactly 3000 queries/second, none of them have broke 1% CPU or 336kb ram

- Neph

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