PowerDNS does not as yet support GPD as an upstream forwarder
My last post explained how Dan Bernstein’s dnscache could be used alongwith Google Public DNS (GPD) as an upstream forwarder.
For those who spend time with DNS, they are likely to be aware of Bert Hubert’s PowerDNS which comes in two flavours, an authorative nameserver and a recursive nameserver
PowerDNS currently hard-codes the RD (recursion desired) bit to 0 when it sends DNS packets to nameservers configured in its forward-zones/forward-zones-file configuration parameter. This makes it impossible for one to configure an open recursive nameserver such as GPD as a forwarder. There is a ticket open in PowerDNS about it and Bert has mentioned on the mailing list that he is close to making the changes to provide the required functionality. Maybe this feature might come in a future PoweDNS recursor release
Yusuf Goolamabbas 