Re: Bare TLD resolutions

[Doug Barton <dougb () dougbarton us>]

On 9/17/14 2:48 PM, Jay Ashworth wrote:
> ----- Original Message -----
> > From: "Andrew Sullivan" <asullivan () dyn com>
>
> > On Wed, Sep 17, 2014 at 04:57:52PM -0400, Jay Ashworth wrote:
> > > ----- Original Message -----
> > > 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".
> >
> > You want to return NXDOMAIN for a name only when the QTYPE is A, AAAA,
> > or MX, and not everything else? Presumably you don't want to do
> > negative caching?
>
> I want to return NXDOMAIN *because there is no record of that type at that
> node*.
>
> That was the underlying point here; I thought that was pretty clear.

But that's not what NXDOMAIN means. :)  You get an NXDOMAIN response 
when there is no label at that point in the tree, period. In the case 
you specify you get the combination of NOANSWER + NOERROR if there is no 
address record, but there are other records (like there are at a zone 
apex).

hth,

Doug