[c-nsp] IPV6 again

j.vaningenschenau at utwente.nl j.vaningenschenau at utwente.nl
Wed Feb 3 07:18:53 EST 2010

> Hmm. Nope - ns4.google.com returns A records only for me.
> A colleague suggests it's this:
> http://www.google.com/intl/en/ipv6/
> You are maybe on a provider who has this enabled?

That's probably the case.

> Does anyone know the details - do the google DNS servers choose to
> reply 
> with AAAA based on AS-path of the querying IP, or netblock? Inbound
> interface?

For our network, the IP addresses of our main resolvers have been
whitelisted by Google (after contacting them, assuring we have native
ipv6 connectivity and will offer support to our users if problems should


Jeroen van Ingen
ICT Service Centre
University of Twente, P.O.Box 217, 7500 AE Enschede, The Netherlands

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