Eszett and IDNAv2 vs IDNA2008

Jaap Akkerhuis jaap at NLnetLabs.nl
Thu Mar 12 21:40:26 CET 2009


    Yes, this is why I said "old clients would just use it as an ordinary
    authority". In other words, the registrant would have to set things up
    on the server side to make sure that e.g. xd--strae-oqa.shinkuro.com
    could be asked for authoritative info. Is this impossible? Or bad for
    other reasons?

It is impossible without making a fundamental change the DNS protocol.

Going back to you original example answer:

    ;; QUESTION SECTION:
    ;strasse.shinkuro.com.      IN  A

    ;; ANSWER SECTION:
    strasse.shinkuro.com.   300 IN  A 66.92.164.104

    ;; AUTHORITY SECTION:
    shinkuro.com.   300 IN  NS  UDNS2.ULTRADNS.net.
    shinkuro.com.   300 IN  NS  xd--strae-oqa.shinkuro.com.
    shinkuro.com.   300 IN  NS  UDNS1.ULTRADNS.net.

All of the three nameservers should the same answer and that (or
no answer as at all) as the one in the query. If not, something is
horribly broken.

It is bad because there it will break the dns protocol for all the
old clients if this behavior is changed. There is no way to signal
the name server a "new" client is asking the question. (If you
could, you could have done just that from a start).

	jaap


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