[Pdns-users] PowerDNS suddenly refuses to resolve

[Brian Candler]

On 24/06/2021 12:03, Laurie Brown via Pdns-users wrote:
> One of my pdns name servers has suddenly stopped resolving, giving a
> status to dig of status: REFUSED. I have no idea why as it was working
> perfectly well for several days (it's a new installation).

Quite possibly because it's not running powerdns at all, it's running 
bind 9 - or at least claims to be.

$ dig +short @ns6.convergent-ict.com version.bind txt chaos
"9.16.1-Ubuntu"
$ dig +short @ns7.convergent-ict.com version.bind txt chaos
"PowerDNS Authoritative Server 4.2.1"

Maybe what has happened is that someone has installed/started bind on 
that server, it bound to port 53, and this in turn is stopping powerdns 
from starting.

BTW, this makes it very clear why the "out in the open" support policy 
is so important! :-)

Also, do note that powerdns 4.2 is due to go end-of-life soon:

https://doc.powerdns.com/authoritative/appendices/EOL.html

Regards,

Brian.