Netflix may have created its own IPv6-specific domain which is responsible for almost a third of all IPv6 traffic. If this is the case it might not be in full compliance with the spirit of World IPv6 Day, as the aim should have been for Netflix to operate one single domain with both AAAA records for IPv6 and A records for IPv4.
What about that? j On Fri, Jun 8, 2012 at 12:31 AM, David Temkin <dave@temk.in> wrote:
On 6/7/12 10:23 PM, Daniel Roesen wrote:
On Fri, Jun 08, 2012 at 12:11:20PM +1000, Mark Andrews wrote:
$ dig @pdns3.ultradns.org www.netflix.com. A +norec +short wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. $ dig @pdns3.ultradns.org www.netflix.com. AAAA +norec +short dualstack.wwwservice--frontend-313423742.us-east-1.elb.amazonaws.com. $ dig @pdns3.ultradns.org www.netflix.com. ANY +short +norec $
Resolving www.netflix.com using ANY RRtype fails with an empty answer section in the DNS response.
Which is just plain BROKEN.
Yup.
This DNS trickery seems to be from the "taking a shower, trying not to get wet" department. And has adverse effects in corner cases. While playing around, I had periods of time where I couldn't resolve the FQDN at all, possibly due some caching of the empty response.
It's not DNS trickery.
The "trickery" is returning different CNAMEs for QTYPE=A and QTYPE=AAAA. I'm not sure what's the goal of that is, but it's 4am here so I have an excuse of not seeing the light. :)
Best regards, Daniel
We've confirmed that UltraDNS had "additional" issues caused by the push that they fixed for the previously reported problem. We are actively engaged with them to come to a resolution.
-Dave
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