nanog mailing list archives

Re: Bare TLD resolutions


From: Jay Ashworth <jra () baylink com>
Date: Wed, 17 Sep 2014 16:57:52 -0400 (EDT)

----- Original Message -----
From: "John Levine" <johnl () iecc com>

The latter would seem to be avoidable by making sure that *DNS resolution
of bare TLDs always returns NXDOMAIN*.

Is that a requirement for a TLD?

No. In fact, a TLD lookup that returned NXDOMAIN would be utterly
broken since that would mean the TLD had no SOA, no NS, and no
subdomains. Perhaps you're confusing it with NOERROR.

No, I was confusing you for someone who understood -- as everyone else
here seems to have -- that I meant "querying for an A, AAAA, or MX 
record".

If it isn't, does anyone know of any domains dumb enough to actual
return something for a lookup on the bare TLD?

Yes. If you'd read RFC 7085, you'd already know which ones do.

There have been A and MX records at TLDs nearly as long as there have
been TLDs.

And this is *why* I assumed you knew that, since the RFC is yours, and
makes precisely that distinction.

Cheers,
-- jra
-- 
Jay R. Ashworth                  Baylink                       jra () 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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