Maintained by: NLnet Labs

[Unbound-users] Parallel queries to DNS resolvers

W.C.A. Wijngaards
Wed Jun 19 13:30:16 CEST 2013


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

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

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.18 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
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=DCjm
-----END PGP SIGNATURE-----