[dns-operations] Anyone from Google here?

[Robert Evans]

On Fri, Apr 17, 2020 at 2:00 AM Mark Andrews <marka at isc.org> wrote:

> Can you please explain why your servers are returning NOTIMP
> for unknown types outside of the range reserved for meta types (128-255)?
>
> The RFC compliant rcode is NOERROR for names that exist and NXDOMAIN for
> names that do not exist.  See RFC3597.
>

Hey Mark,

Not sure the motivation for why the server does that, but I agree it should
be NOERROR or NXDOMAIN for all RTYPEs that don't exist including unknown
ones. We're looking into this and will get back to you.

-Bob
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