On Fri, Apr 17, 2020 at 2:00 AM Mark Andrews <ma...@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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