On Jun 28, 2012, at 2:35 PM, Paul Vixie wrote:

> On 6/28/2012 7:10 PM, Michael Graff wrote:
>> 
>> "BCP 38"  Enough said.
> 
> what does that mean?

It means that time and time again, either sufficient mass must implement a 
feature like this, or it is effectively pointless.  It also means that the pain 
of installing such a security feature is on the side that does not feel the 
pain.

But, unlike BCP38 which would make a difference if enough ISPs implemented it, 
this is another form of an arms race against a well armed opponent.  That said, 
the "slip" factor is clever, but I still worry about translating what would be 
a UDP timeout into a TCP query in addition to a filter that takes only 5 
sequential packets to activate.

--Michael

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