[Pdns-users] PowerDNS Recursion / Forward-Zone (Strange issue)

Devin Acosta linuxguru.co at gmail.com
Thu Feb 14 17:34:44 UTC 2019

Dear Users,
I am running the latest version of PowerDNS Recursion software, and I had an outage this morning in Production and experienced some strangeness that I couldn’t explain, was hoping someone might have an explanation of what happened.
So the recursion configuration had a single domain that was listed in the forward-zones section like this: forward-zones=*.domain.com=
A user added some records to the Authoritative domain and the Authoritative domain when queried would return the result, however the Recursion was returning (no records) for the newly added records. As far as I know the record never was requested before it was added to DNS, so it should’t have been cached in the negative response which seems to be for a day cached by default. It was resolving older records just not the new ones.
I then restarted the powerdns recursion daemon, and all of a sudden it stopped answering for all forward requests for the zone “domain.com” in my example here. After some time it started resolving all domains and the new records, but I had to in a hurry change back to our old Bind system because it caused an outage.
I’m a bit worried why it completely stopped responding for a period of time for all records, then now appears to be happy. I am not sure if it has something to do with the Caching between the Authoritative server and the Recursion, but something happened.
Any help would be greatly appreciated.
Devin Acosta
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