On 22/06/2021 16:16, Thomas via Pdns-users wrote:
Thanks for the clarification, but this scares me. How can I have configured the server in a way it thinks it is authoritative for the entire Internet? It should be authoritative for zur-sonne.it and the other 2500 domains we have, sihosting.cloud is not part of the domains we host....

Check your configs and database, see if you have a zone "" or "."

As misconfigurations go, this isn't a very scary one.  You should never be receiving queries at this nameserver for domains that you're not authoritative for - that is, unless someone has wrongly pointed NS records at this server.

However it might trip you up if you point one of your *own* domains at this server, but haven't yet added the zone, and some proportion of queries which hit this server get an authoritative NXDOMAIN response, which the user will see as "this site cannot be reached" or similar.

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