[Pdns-users] Retry NXDOMAIN with a secondary forwarder

Richard Connon conan at irconan.co.uk
Mon Jan 9 10:30:20 UTC 2012

On 08/01/2012 21:55, Erik Weber wrote:
> On Sat, Jan 7, 2012 at 6:30 PM, Richard Connon<conan at irconan.co.uk>  wrote:
>> On 07/01/2012 17:24, Peter van Dijk wrote:
>>> On Jan 7, 2012, at 4:45 , Richard Connon wrote:
>>>> Is it possible through lua scripting or otherwise to configure powerdns
>>>> to look NXDOMAIN responses up in a second forwarder before returning
>>>> To clarify I'd like it to go something like:
>>>> lookup name in NS1
>>>> if found in NS1:
>>>>     return NS1 result
>>>> else:
>>>>     lookup name in NS2
>>>>     return NS2 result
>>> Taking one step back: what actual problem are you trying to solve here?
>> I want to overlay a set of names onto an existing DNS zone for which I don't
>> control the nameserver.
>> I have a number of names which are "mine" inside a zone managed "higher up"
>> my organisation. The zone also contains lots of names which are not "mine".
>> DNS updates can take over 3 weeks (ridiculous, no?) to happen on the actual
>> organisational nameservers so I want to make a resolver which will reflect
>> our changes immediately.
> Could you possibly access "your" data by any other means than DNS
> (like database or something)? If so, couldn't you just write a plugin
> that checks your backend for the record and otherwise just return to
> normal lookup mode?

I could do that. How difficult would that be? At the moment I wouldn't 
know where to start.

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