[Pdns-users] SERVFAIL responses on malformed subdomain query

[Peter van Dijk]

On Thu, 2021-10-14 at 16:01 +0200, Remi Gacogne via Pdns-users wrote:
> On 10/14/21 15:52, Thib D via Pdns-users wrote:
> > It seems like pdns auth servers are answering SERVFAIL queries when the 
> > subdomain is malformed in the query. It is testable on powerdns.com 
> > <http://powerdns.com> domain - which I assume is hosted on a pdns-auth 
> > backend.
> > 
> That behaviour can be configured via the 8bit-dns parameter [1], which 
> default to false. It used to be an issue for some PowerDNS backends but 
> my understanding is that it should be safe to turn it on nowadays.
> 
> [1]: https://doc.powerdns.com/authoritative/settings.html#bit-dns

I am not sure it is safe to turn on with the SQL backends today. Our
test suite does not cover it, so we can't guarantee correct operation.

Kind regards,
-- 
Peter van Dijk
PowerDNS.COM BV - https://www.powerdns.com/