[Pdns-users] SERVFAIL responses on malformed subdomain query
remi.gacogne at powerdns.com
Thu Oct 14 14:01:10 UTC 2021
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
> I am not sure what is the correct answer here, but I'm only seeing this
> on pdns-auth installations. From the other authoritative nameservers
> I've tested, every single one of them is answering NXDOMAIN ( isc.org
> <http://isc.org> / knot-dns.cz <http://knot-dns.cz> / facebook.com
> <http://facebook.com> / google.com <http://google.com> / nlnetlabs... )
> in this case.
That behaviour can be configured via the 8bit-dns parameter , 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.
PowerDNS.COM BV - https://www.powerdns.com/
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