Maintained by: NLnet Labs

[Unbound-users] Semantics of 'forward'

Tim Kindberg
Sat Jul 24 11:25:56 CEST 2010


Thanks Florian.

Is there a way of making U use DNS rather than EDNS to get around this 
situation?  If it uses EDNS for forward zones, that would explain why 
they didn't solve my problem.

Tim

On 24/07/2010 09:31, Florian Weimer wrote:
> * Tim Kindberg:
>
>> DNS clients on U receive correct results from D as expected.
>> But when C requests a resolution result via U, D does not reply.
>>
>> In other words, D has a setting that drops recursive requests not
>> originating with the requestor.
>
> The DNS protocol currently does not support that because it does not
> distinguish forwarded from original requests (but there is a draft
> which would change this).
>
> So D probably just refuses to respond to EDNS requests which U happens
> to send.  This would also happen to C if they sent EDNS requests, too.

-- 

Tim Kindberg
Matter 2 Media Ltd
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