[Pdns-users] pdns_recursor and records in additional section of replies

Remi Gacogne remi.gacogne at powerdns.com
Wed Jan 23 09:04:34 UTC 2019

Hi Thomas,

On 1/23/19 8:01 AM, Thomas Mieslinger wrote:
> I would like to better understand how pdns_recursor 4.1.x deals with
> records in the additional section of replies it gets from authoritative
> Servers.

These records, if the recursor considers that the authoritative server
is allowed to send them, are added to the cache and might be later used
for "infrastructure" queries, ie to retrieve the nameservers for a given
zone and their IPv4 and/or IPv6 addresses.

> In short I would like that pdns_recursor does not use information from
> additional sections. Just like pdns authoritative 4.1.x does not
> generate additional sections anymore.

Completely ignoring additional records would break zones that need glue
records to resolve, at the very least. What are you trying to achieve?

Best regards,
Remi Gacogne
PowerDNS.COM BV - https://www.powerdns.com/

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