[dns-operations] I missed the announcement: .ARPA has beendeleted

George Barwood george.barwood at blueyonder.co.uk
Tue Feb 16 17:30:00 UTC 2010

----- Original Message ----- 
From: "Paul Vixie" <vixie at isc.org>

> note that i would love to be able to express, in root server responses, that
> "not only does your qname not exist, but the tld that your qname is in does
> not exist either, and so if you just asked me for foo.local, please do not
> ask me for bar.local".  and, i would like to be able to do this even without
> dnssec.  ideally we could just send "local" (in this example) as the response
> qname, but the way things have evolved the whole q-tuple has to match the
> original query, so that's out.

Is it possible for the resolver to send a more suitable query in the first place for TLDs?

My resolver ( when the Bailiwick is root ) sends a NS query for just the TLD,
unless the original question was just for the TLD ( and not a sub-domain ).

This means that non-existent TLDs get cached, and on startup, there is query-sharing
- the resolver only sends a single query for each TLD. There is a slight privacy gain
as well ( which I think was the original motivation ).

I don't know whether it is strictly in accordance with the standard, but I have not noticed
any problems.


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