Eszett and IDNAv2 vs IDNA2008

Jaap Akkerhuis jaap at
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.
    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:

    ;      IN  A

    ;; ANSWER SECTION:   300 IN  A

    ;; AUTHORITY SECTION:   300 IN  NS   300 IN  NS   300 IN  NS

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).


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