Unable to get AAAA for www.revk.uk from some of our servers
frnkblk at iname.com
Wed Dec 24 17:08:24 UTC 2014
Except queries from 18.104.22.168 and 22.214.171.124 reliably return the AAAA
while queries from 126.96.36.199 do not. And we're all the same ISP, and in
the one case, from the same /24. I don't think Google is that granular. And
we do have good IPv6 connectivity.
From: Stuart Henderson [mailto:stu at spacehopper.org]
Sent: Wednesday, December 24, 2014 11:05 AM
To: Frank Bulk
Cc: 'Mark Andrews'; bind-users at isc.org
Subject: Re: Unable to get AAAA for www.revk.uk from some of our servers
On 2014/12/23 21:33, Frank Bulk wrote:
> So the question seems to come down to: "why does Google's name server not
> return the AAAA when I query it from some IPs?"
Didn't google have some kind of ISP whitelisting for handing out AAAAs?
Ah yes... https://developers.google.com/speed/public-dns/faq mentions it:
"Note that you may not receive IPv6 results for Google properties. To
optimize the user experience, Google only serves AAAA records to clients
behind ISPs with good IPv6 connectivity."
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