Great Circle Associates Firewalls
(January 1997)
 

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Subject: Re: Denial of service (was Re: Air Force Web Site Hacked)
From: Michael Idengren <midengre @ stetson . edu>
Date: Wed, 1 Jan 1997 13:37:00 -0500 (EST)
To: Paul Ferguson <pferguso @ cisco . com>
Cc: Mark Johnson <mark @ hercules . reno . nv . us>, firewalls @ GreatCircle . COM
In-reply-to: <3 . 0 . 32 . 19961231222828 . 006b99dc @ lint . cisco . com>

> the world, but a simple-minded denial-of-service attack makes it
> almost an effort in futility if connectivity is your lifeblood.

Speaking of denial-of-service attacks, how would one go about tracing
packets with a false IP header?

The delimma here is that we have got our router configured properly so
that it doesn't let any packets leave our network with false headers.  But
there's a whole slew of people out there with routers who either don't
care or don't know how to filter bad outgoing packets.  This presents a
big problem for us if someone decides to execute a denial of service on
us, or even do a simple IP spoof in a hacking attempt so we can't trace
them.

Any Suggestions? 

Mike Idengren			 | MEISTER
---------------------------------+----------------------------------
Center for Information Technology| Alachua Free-Net IRC Administrator
Stetson University		 | WorldWide Free-Net IRC Network Coordinator
			



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