Hi,
I have a question about how Powerdns works internally after having read
the documentation at
https://doc.powerdns.com/md/authoritative/internals/
From the documentation:
"When a query for a qname/qtype tuple comes in, PowerDNS queries
backends to find the closest matching SOA, thus figuring out what
backend owns this zone. When the right backend has been found, PowerDNS
issues a qname/ANY query to the backend. If the response is empty,
NXDOMAIN is concluded. If the response is not empty, any contents
matching the original qtype are added to the list of records to return,
and NOERROR is set."
What happens when the response of the ANY query is not empty but is not
of the original qtype? Like in the problem I posted about yesterday:
when a client is asking for the MX record of abc.example.com the ANY
query that Powerdns executes will return one MySQL row with an A record
for abc.example.com. Since that A record is not the original qtype MX
shouldn't Powerdns also conclude NXDOMAIN then? Somehow it seems to me
this is not what is happening right now.
Martin
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