BCP38 is hard, was TWC (AS11351) blocking all NTP?

Jay Ashworth jra at baylink.com
Wed Feb 5 01:08:36 UTC 2014

----- Original Message -----
> From: "John Levine" <johnl at iecc.com>

> Subject: Re: BCP38 is hard, was TWC (AS11351) blocking all NTP?
> >Why does it have to be hard? Restricting the filter to addresses
> >which
> >(A) the customer asserts are theirs
> How does the customer do that in a way that scales?
> I don't think any of this is rocket science, but it apparently is a
> real block to BCP38/84 implementatin.

Well, there are two issues: how many exceptions at the transit layer will 
actually be needed, in practice...

and how much trouble will there still be there if we can get appreciable
uptake at the edge?

-- jra
Jay R. Ashworth                  Baylink                       jra at baylink.com
Designer                     The Things I Think                       RFC 2100
Ashworth & Associates       http://www.bcp38.info          2000 Land Rover DII
St Petersburg FL USA      BCP38: Ask For It By Name!           +1 727 647 1274

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