NAT64 and matching identities

Fri Nov 22 19:57:22 UTC 2013

I question how one can have a top 100 website without an A record.

I am inclined to believe there is a bug in there somewhere.

Owen

On Nov 22, 2013, at 10:18 AM, Tony Hain <alh-ietf at tndh.net> wrote:

> Lee Howard wrote:
> ...
>>>>> There is obviously a long tail of ip4 destinations, but nearly all
>>>>> of 500 of the Alexa global 500 have ip6 listeners,
>>>> 
>>>> Do you have a data source for that?  I see no indication of IPv6
>>>> listeners on 85% of the top sites.
>>> 
>>> A slightly different metric, 44% of USA content available on IPv6:
>>> 
>>> http://6lab.cisco.com/stats/
>> 
>> Right, weighted by DNS queries.
>> Compare to http://www.vyncke.org/ipv6status/detailed.php?country=us
>> and http://www.employees.org/~dwing/aaaa-stats/
>> 
>> Not equivalent to "nearly all of Alexa 500."
> 
> Using a derivative of Dan Wings code from a couple of years back I get:
> 
> The top 5 websites: AAAA records and IPv6 connectivity
>           count with A:        5   (100.000%)
>        count with AAAA:        4   ( 80.000%)
> Of the 4 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:        4   (100.000%)
> 
> The top 10 websites: AAAA records and IPv6 connectivity
>           count with A:       10   (100.000%)
>        count with AAAA:        6   ( 60.000%)
> Of the 6 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:        6   (100.000%)
> 
> The top 25 websites: AAAA records and IPv6 connectivity
>           count with A:       25   (100.000%)
>        count with AAAA:       10   ( 40.000%)
> Of the 10 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:       10   (100.000%)
> 
> The top 50 websites: AAAA records and IPv6 connectivity
>           count with A:       50   (100.000%)
>        count with AAAA:       21   ( 42.000%)
> Of the 21 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:       21   (100.000%)
> 
> The top 100 websites: AAAA records and IPv6 connectivity
>           count with A:       98   ( 98.000%)
>        count with AAAA:       30   ( 30.000%)
> Of the 30 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:       30   (100.000%)
> 
> The top 250 websites: AAAA records and IPv6 connectivity
>           count with A:      248   ( 99.200%)
>        count with AAAA:       56   ( 22.400%)
> Of the 56 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:       56   (100.000%)
> 
> The top 500 websites: AAAA records and IPv6 connectivity
>           count with A:      494   ( 98.800%)
>        count with AAAA:       91   ( 18.200%)
> Of the 91 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:       91   (100.000%)
> 
> The top 1000 websites: AAAA records and IPv6 connectivity
>           count with A:      990   ( 99.000%)
>        count with AAAA:      132   ( 13.200%)
> Of the 132 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:      132   (100.000%)
> 
> The top 2500 websites: AAAA records and IPv6 connectivity
>           count with A:     2479   ( 99.160%)
>        count with AAAA:      216   (  8.640%)
> Of the 216 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:      214   ( 99.074%)
> 
> The top 5000 websites: AAAA records and IPv6 connectivity
>           count with A:     4959   ( 99.220%)
>        count with AAAA:      354   (  7.083%)
> Of the 354 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:      347   ( 98.023%)
> 
> The top 10000 websites: AAAA records and IPv6 connectivity
>           count with A:     9918   ( 99.230%)
>        count with AAAA:      600   (  6.003%)
> Of the 600 hosts with AAAA records, testing connectivity to TCP/80:
>     count with IPv6 ok:      575   ( 95.833%)
> 
> Original code developed by dwing at employees.org.
> manual run by tony on arabian.tndh.net using ./IPv6-check .
> on Fri Nov 22 09:48:17 PST 2013  (elapsed: 00:08:33, t: 15).
> Top 10000 websites based on Alexa top-1m.csv.
> 
> 