On May 22, 2014, at 9:18 PM, Matthew Petach <mpet...@netflight.com> wrote:
> On Thu, May 22, 2014 at 8:49 AM, Lee Howard <l...@asgard.org> wrote: > >> >> >> On 5/22/14 8:04 AM, "Livingood, Jason" <jason_living...@cable.comcast.com> >> wrote: >> [snip] >> In his really useful listing of content providers' IPv6 support, >> https://www.vyncke.org/ipv6status/ Eric Vyncke has added "CDN" to sites >> using an identifiable CDN. >> > > I suspect there's a problem with > the data collection on that site; > looking at > https://www.vyncke.org/ipv6status/detailed.php?country=us > I really don't think the top 5 players > don't support IPv6 DNS queries at all. > I'd be curious to know more about how the > data there is collected; I don't see any links > to any description of the data collection > methodology on the site. > > Matt The data is correct — The top 5 players on that page do not have AAAA records published for their authoritative name servers (despot all being v6-capable for most or all of their content): ryan@lion:~$ echo google.com facebook.com youtube.com yahoo.com wikipedia.org | xargs -n1 dig +short -t NS | xargs -n1 dig +short -t AAAA ryan@lion:~$ (no results for the authoritative servers of all 5 domains) ryan@lion:~$ echo google.com facebook.com youtube.com yahoo.com wikipedia.org | xargs -n1 dig +short -t NS | xargs -n1 dig +short -t A 216.239.34.10 216.239.32.10 216.239.38.10 216.239.36.10 69.171.239.12 69.171.255.12 216.239.38.10 216.239.34.10 216.239.36.10 216.239.32.10 68.180.131.16 119.160.247.124 203.84.221.53 68.142.255.16 121.101.144.139 98.138.11.157 91.198.174.239 208.80.152.214 208.80.154.238 ryan@lion:~$ (19 A record total results for the 5 domains in question) The same query done together with host(1), excluding various MX responses, which would show v6 answers alongside the v4: ryan@lion:~$ echo google.com facebook.com youtube.com yahoo.com wikipedia.org | xargs -n1 dig +short -t NS | xargs -n1 host | grep -v mail ns1.google.com has address 216.239.32.10 ns2.google.com has address 216.239.34.10 ns4.google.com has address 216.239.38.10 ns3.google.com has address 216.239.36.10 b.ns.facebook.com has address 69.171.255.12 a.ns.facebook.com has address 69.171.239.12 ns4.google.com has address 216.239.38.10 ns2.google.com has address 216.239.34.10 ns1.google.com has address 216.239.32.10 ns3.google.com has address 216.239.36.10 ns5.yahoo.com has address 119.160.247.124 ns2.yahoo.com has address 68.142.255.16 ns3.yahoo.com has address 203.84.221.53 ns1.yahoo.com has address 68.180.131.16 ns4.yahoo.com has address 98.138.11.157 ns6.yahoo.com has address 121.101.144.139 ns0.wikimedia.org has address 208.80.154.238 ns1.wikimedia.org has address 208.80.152.214 ns2.wikimedia.org has address 91.198.174.239 ryan@lion:~$
