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Re: WANTED: ISPs with DDoS defense solutions
From: "Christopher L. Morrow" <chris () UU NET>
Date: Tue, 5 Aug 2003 04:09:02 +0000 (GMT)



On Mon, 4 Aug 2003 bdragon () gweep net wrote:


On Mon, Aug 04, 2003 at 05:28:07PM -0400, bdragon () gweep net wrote:

I'm all for raising the bar on attackers and having end networks implement
proper source filtering, but even with that 1000 nt machines pinging 2
packet per second is still enough to destroy a T1 customer, and likely
with 1500 byte packets a T3 customer as well. You can't stop this without
addressing the host security problem...

Do you believe backbone networks should do nothing?

    I'm not sure what you are saying here, backbones do do
something, the problem is that it's easy to fill up a T1.  *really* easy.

I was asking about Chris's use of "having end networks implement
proper source filtering" implying that backbones should not do so.

There are many cases in which the backbone can't determine the 'proper'
traffic an edge is sending in. Not to mention the problems of filtering on
an edge device with 100's or 1000's of interfaces. The proper and simple
place for this filtering  is as close to the end device as possible.
Backbones just aren't made to filter traffic, edge networks are.


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