At 12:28 -0400 4/19/10, Jason Livingood wrote:
This thread seems to have died out. But I will note that it appears to be
on the agenda at the upcoming ISOC IPv6 workshop (from 16:30 - 18:00 - see
https://www.isoc.org/isoc/conferences/registration/index.php?id=7ce20e4c88b7
e328). It is also addressed in a short whitepaper some colleagues and I put
together in advance of that meeting (available at
http://www.comcast6.net/IPv6_DNS_Whitelisting_Concerns_20100416.pdf)
After reading the white paper I can think of a lot of things to say,
but not much related to DNS operations. What comes to mind is
something that could make use of this proposal:
http://tools.ietf.org/html/draft-vandergaast-edns-client-ip-00
That is not a savior here, I don't propose it to be. What I wanted
to point out is that while that proposal is talking about conveying
addressing information in support of tailoring answers, the white
paper is talking about the design of the tailoring.
In some cases, responses can be tailored according to a simple design
- "all addresses in North America get these servers, in Europe those
servers, in Asia those servers, and so on. But the problem with IPv6
connectivity testing is that the granularity (needed for tailoring)
is not very consistent.
It depends on whether the matter is that an entire /LIR's with of
addresses can't be reached from the provider or just those clients
using 6to4 or just a particular client behind a cable modem still
running from June 1942.
I used to think the problem was "how to get around discontinuous IPv6
routing when I have a local "global" address." Now it seems like
it's a problem of scattered and varied (to use the same ill-defined
word) "brokenness" sprinkled all over the place. What's this got to
do with DNS operations? I can't see...how the DNS can really be of
help in this matter.
--
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Edward Lewis
NeuStar You can leave a voice message at +1-571-434-5468
Wouldn't it be nice if all of the definitions of equivalence were the same?
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