NAT64 and matching identities

Fri Nov 22 18:18:27 UTC 2013

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.