slave: WARNING: recursion requested but not available

Phil Mayers p.mayers at imperial.ac.uk
Fri Jun 6 11:40:12 UTC 2014


On 06/06/14 12:35, Reindl Harald wrote:
>
> Am 06.06.2014 13:28, schrieb Matus UHLAR - fantomas:
>> On 06.06.14 13:13, Reindl Harald wrote:
>>> why does in case of asking the slave always come a
>>> "WARNING: recursion requested but not available"
>>> even if you dig a A-record he is authoritative?
>>
>> because you request recursion and the server does not provide it.
>>
>> use "dig +norecurse" not to request recursion
>
> i am asking a auth name server for it's own domain
> where and why do i request recursion in that case?

Clients talk to recursive resolvers. They request recursion.

Recursive resolvers talk to authoritative servers. They don't request 
recursion (unless you'd doing forwarding).

If you want to emulate a recursive resolver i.e. another DNS server, 
specify +norecurse to dig.

If your master is offering recursion, then it's *also* acting as a 
recursive. This is usually not what you want.


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