NAT64 and matching identities

Fri Nov 22 21:28:47 UTC 2013

The only thing it explicitly strips out are dotted-quads, which don't occur
until # 4255. The code makes five passes at getaddrinfo() for IPv4 before
giving up, and then it checks for a leading www and if that exists it strips
it off and does the 5 tries loop again, then later the same process for
IPv6. For the top 100 run:
akamaihd.net                    no IPv4   no IPv6
bp.blogspot.com                 no IPv4   no IPv6

FWIW :::
Dotted-quad's in the top 10,000
4255,92.242.195.24
4665,1.1.1.1
5079,92.242.195.231
6130,1.254.254.254
9518,208.98.30.70

> whois 92.242.195.24
...
netname:        Respina
descr:          BroadBand IP Pool
country:        IR
...
route:          92.242.195.0/24

Respina BroadBand IP Pool in the top 100,000
4255,92.242.195.24
5079,92.242.195.231
10059,92.242.195.233
23912,92.242.195.30
31520,92.242.195.111
35867,92.242.195.235
95233,92.242.195.129

> -----Original Message-----
> From: Owen DeLong [mailto:owen at delong.com]
> Sent: Friday, November 22, 2013 12:16 PM
> To: joel jaeggli
> Cc: Valdis.Kletnieks at vt.edu; Tony Hain; NANOG List
> Subject: Re: NAT64 and matching identities
> 
> It would be way more than 2 if it were CNAME, methinks.
> 
> Owen
> 
> On Nov 22, 2013, at 12:12 PM, joel jaeggli <joelja at bogus.com> wrote:
> 
> > On 11/22/13, 12:01 PM, Valdis.Kletnieks at vt.edu wrote:
> >> On Fri, 22 Nov 2013 10:18:27 -0800, "Tony Hain" said:
> >>
> >>> 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%)
> >>
> >> Statistics whoopsie, or are there actually 2 sites in the top100 that
> >> are IPv6-only?
> >
> > IN CNAME ? or is that being accounted for.
> >
> >
> >