Connectivity to an IPv6-only site

Jim Burwell jimb at jsbc.cc
Fri Apr 23 08:19:34 CDT 2010


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On 4/23/2010 05:42, Jared Mauch wrote:
>
> On Apr 23, 2010, at 5:49 AM, Dave Hart wrote:
>
>> On Fri, Apr 23, 2010 at 08:26 UTC, Steve Bertrand
>> <steve at ibctech.ca> wrote:
>>> - in WHOIS, I have ns1 and ns2.onlyv6.com 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 www.onlyv6.com. ;; global
> options: +cmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status:
> SERVFAIL, id: 54773 ;; flags: qr rd ra; QUERY: 1, ANSWER: 0,
> AUTHORITY: 0, ADDITIONAL: 0
>
> ;; QUESTION SECTION: ;www.onlyv6.com.            IN    ANY
>
> ;; Query time: 1605 msec ;; SERVER: 68.87.72.130#53(68.87.72.130)
> ;; WHEN: Fri Apr 23 08:41:08 2010 ;; MSG SIZE  rcvd: 32
>
>
You'll see a lot of this.  I've done my own little tests on a few
friends' systems, and on public wifi, etc, establishing some sort of
IPv6 connectivity, and trying to resolve a subdomaiin of mine with a
IPv6 only DNS server.  Many ISP recursive NS don't have IPv6 transport
yet, so they choke getting to my NS.

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