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Re: DoS attack... what to do?

Subject: Re: DoS attack... what to do?
Date: Tue, 04 Jan 2005 18:04:03 -0500
On 4 Jan 2005 at 16:44, Mark C wrote:

1) Netsky's 5556 is TCP, so I'd fire up netcat or something and see if 
actual 3-way handshakes happen.  If yes, then it's much less likely that 
it's someone out in the world spoof SYNflooding you.  If no, then I'd 
treat this as a SYNflood and trace backwards through the ISP, you'll 
probably find it's coming from far fewer sources than you think.

How do you do this?  If the packets coming in have forged source-IP 
addresses, how do you trace them backwards?

  /Bernie\

-- 
Bernie Cosell                     Fantasy Farm Fibers
mailto:bernie@fantasyfarm.com     Pearisburg, VA
    -->  Too many people, too few sheep  <--       



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