Connectivity to an IPv6-only site

Jared Mauch jared at
Fri Apr 23 07:42:41 CDT 2010

On Apr 23, 2010, at 5:49 AM, Dave Hart wrote:

> On Fri, Apr 23, 2010 at 08:26 UTC, Steve Bertrand <steve at> wrote:
>> - in WHOIS, I have ns1 and listed as the authoritative
>> name servers
>> - both of these servers *only* have IPv6 addresses
> Which seems a bit far afield from reality to me.  Yes, there are lots
> of folks with IPv6 connectivity and v4-only recursive DNS servers.  I
> don't think ISPs will have problems setting aside a handful of IPv4
> addresses for authoritative DNS infrastructure to work around this
> until v6 transport in recursive DNS servers is common enough.

Not really, having your nameservers be IPv6 enabled is a reasonable thing to do.

FYI: on comcast I see SERVFAIL, meaning their recursives do not have IPv6 transport.

(I know we have that at my employer on our customer-facing recursives).

; <<>> DiG 9.6.0-APPLE-P2 <<>> any
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 54773
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0

;			IN	ANY

;; Query time: 1605 msec
;; WHEN: Fri Apr 23 08:41:08 2010
;; MSG SIZE  rcvd: 32

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