I don't understand what the problem is.

_91867ab3c77f152ba4ab0cceeabb3666.expose.graf-borstar.de. 3600 IN CNAME
_c09668a36b3b6665549a795863f30b9b.olprtlswtu.acm-validations.aws.

_c09668a36b3b6665549a795863f30b9b.olprtlswtu.acm-validations.aws. TXT
"98b89819ca31466e81cf73925fe2c6ea"

It is a cname pointing to a TXT record. should be good enough for a
validation.

On 26.09.19 12:06, Kevin Olbrich wrote:
Hi!

I've now met a problem where I don't know how to proceed:

===========>% ===========
C:\Users\kolbrich>nslookup -q=CNAME
_91867ab3c77f152ba4ab0cceeabb3666.expose.graf-borstar.de
<http://91867ab3c77f152ba4ab0cceeabb3666.expose.graf-borstar.de>. 8.8.8.8
Server:  dns.google
Address:  8.8.8.8

Nicht autorisierende Antwort:
_91867ab3c77f152ba4ab0cceeabb3666.expose.graf-borstar.de
<http://91867ab3c77f152ba4ab0cceeabb3666.expose.graf-borstar.de>
  canonical name =
_c09668a36b3b6665549a795863f30b9b.olprtlswtu.acm-validations.aws
===========>% ===========

My NS has a catch-all zone using "." including SOA to be authoritative
for all new domains that do not yet have a zone (async processing).
This allows us to be responsive for zones we actually did not yet create
or have not been replicated.

It's seems, that AWS uses the same authoritative NS to resolv it's own
CNAME (which does not resolve at all in public):

   ===========>% ===========
C:\Users\kolbrich>nslookup
_c09668a36b3b6665549a795863f30b9b.olprtlswtu.acm-validations.aws.
10.100.0.210
(root)
         primary name server = ns01.srvfarm.net <http://ns01.srvfarm.net>
         responsible mail addr = dnsnoc.dolphin-it.de
<http://dnsnoc.dolphin-it.de>
         serial  = 2
         refresh = 10800 (3 hours)
         retry   = 3600 (1 hour)
         expire  = 604800 (7 days)
         default TTL = 3600 (1 hour)
Server:  UnKnown
Address:  10.100.0.210

Name:    _c09668a36b3b6665549a795863f30b9b.olprtlswtu.acm-validations.aws
Addresses:  2a06:9500:1002:0:185:118:197:123
           185.118.197.123
   ===========>% ===========

Do I need to adjust the "graf-borstar.de <http://graf-borstar.de>"-zone?
If yes, how?
I am running dnsdist in front, should I adjust something there?

Kind regards
Kevin


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