[Pdns-users] Howto use pdns as DNS proxy with multiple recursion servers as source

[abang at t-ipnet.net]

Stefan Schmidt schrieb:
> On Thu, Jan 14, 2010 at 03:34:37PM +0100, abang at t-ipnet.net wrote:
>> maybe you can use the PowerDNS recursing nameserver (3.1.7.2) with
>> this configuration:
>>
>> auth-zones=your_domain=your_zone_file
>> forward-zones=.=1.2.3.4;1.2.3.5;1.2.3.6
>>
>> So all except your_domain will forwarded to one of the three forwarders.
> 
> I fear this will not work as you would expect. The forward-zones feature in
> PowerDNS recursor does not set the recursion desired (RD) flag in the queries
> it forwards as it is intended for forwarding queries to authoritative
> Nameservers only.

you are right. The config setting is --forward-zones-recurse:

forward-zones-recurse=.=1.2.3.4;1.2.3.5;1.2.3.6

But this option is new (http://wiki.powerdns.com/trac/changeset/1451) 
and only available in the pdns trunk and not in 3.1.7.2

Winfried