On Jul 26, 2012, at 5:13 AM, Drew Weaver wrote:

> Another nice "emerging" tool [I say emerging because it's been around forever 
> but nobody implements it] to deal with this is Flowspec, using flowspec you 
> can instruct your Upstream to block traffic with much more granular 
> characteristics.

flowspec is essentially S/RTBH with layer-4 granularity (it can do some other 
things, as well).  I certainly hope that vendors who've not yet implemented it 
will do so, it's a great tool, as you say.

Even customer-triggered S/RTBH is very useful, and some ISPs have implemented 
it for their customers.

-----------------------------------------------------------------------
Roland Dobbins <rdobb...@arbor.net> // <http://www.arbornetworks.com>

          Luck is the residue of opportunity and design.

                       -- John Milton


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