Martin Millnert martin at
Wed Feb 3 10:23:25 CET 2010

On Fri, 2010-01-29 at 11:10 +0100, Gert Doering wrote:
> The youtube web page is IPv4 only, but the images and videos are delivered
> over IPv6.  You can see this in the dns on, for example,

I'm not sure when it happened, but right now I'm getting the web page
dual-stacked as well,

anticimex at hsa:~$ host is an alias for has address has address has address has address has address has address has IPv6 address 2a00:1450:8007::66 has IPv6 address 2a00:1450:8007::71 has IPv6 address 2a00:1450:8007::8a has IPv6 address 2a00:1450:8007::8b has IPv6 address 2a00:1450:8007::64 has IPv6 address 2a00:1450:8007::65

I tried firewalling away my IPv4 connectivity and used a non-local,
dual-stacked, DNS resolver to browse the page and it sort-of works.
Front page looks kind-of stupid (some elements missing), but it is
possible to view videos, etc. :)

When using a local resolver the DNS fails however, as expected.
Isn't end-users having local resolvers something to expect in the
future, with DNSSEC and all? It's not a rhetorical question. I actually
want to know, since this affects the degree to which dual-stacked /
single-stack-v6 DNS support will be required to serve future mobile
v6-only users, or what not.

So you IPv6 ninjas over at Google, what's next? :)
Achieving support of single-stack IPv6 users should be the long-term
goal, I presume.
Dare you answer at all re: the DNS infrastructure? :)

Big thanks,
Martin Millnert <martin at>
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