[Unbound-users] Parallel queries to DNS resolvers

W.C.A. Wijngaards wouter at nlnetlabs.nl
Wed Jun 19 11:30:16 UTC 2013


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Hi Pavlos,

On 06/14/2013 04:43 PM, Pavlos Parissis wrote:
> Hi all,
> 
> I would like to know if it is possible with your libraries to
> query multi DNS resolvers at the same time and return to the caller
> the 1st response that comes from DNS server(s)

Libunbound does not implement this. Normally, libunbound probes the
nameservers and then selects the best nameserver.  One that is fast,
but also randomised to prevent spoofing (RTT banding).

Best regards,
   Wouter

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