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Re: SMURF amplifier block list
From: "Forrest W. Christian" <forrestc () iMach com>
Date: Sun, 12 Apr 1998 19:11:14 -0600 (MDT)

I just came to realize that there is one big problem with using BGP to
blackhole these SMURF-amplifier sites.

Put really simply, if you create a BGP blackhole all you do is prevent
your packets from getting to their network - not the converse.

While being listed on a blackhole list which affects connectivity might be
enough to encourage people to set no ip directed-broadcast or equivalent
on appropriate interfaces, I'd rather see a real filter set which I can
drop the packets at my internet-facing edges.  How to update the filter
set dynamically is another issue that I'd like to hear about.

Am I thinking correctly here or am I missing some convoluted BGP
configuration?

- Forrest W. Christian (forrestc () imach com) 
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iMach, Ltd., P.O. Box 5749, Helena, MT 59604      http://www.imach.com
Solutions for your high-tech problems.                  (406)-442-6648
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