[Info-vax] implementing IPv6 on the internet

[Dirk Munk]

Paul Sture wrote:
> On 2016-09-24, Richard Levitte <richard at levitte.org> wrote:
>> Den lördag 24 september 2016 kl. 00:43:16 UTC+2 skrev Dirk Munk:
>>> Richard Levitte wrote:
>>>> Den fredag 23 september 2016 kl. 22:10:50 UTC+2 skrev Richard Levitte:
>>>>> Den fredag 23 september 2016 kl. 20:59:55 UTC+2 skrev Dirk Munk:
>>>>>> With "keep on dreaming" I was referring to your translation on the CE
>>>>>> router idea, IPv6 over the Internet, IPv4 at your home LAN.
>>>>>
>>>>> Oh, I'm sure someone will love NAT enough to do just that.
>>>>>
>>>>> Cheers,
>>>>> Richard ( #ishouldshutupnow )
>>>>
>>>> I wrote this for chuckles, and was hoping that the hashtag would
>>>> give you all an indication.  I'm amazed someone's taking this
>>>> seriously.
>>>>
>>>
>>> In the IP world anything is possible. Some guys did make IPv6 NAT.
>>
>> Mm...  and apparently, what I made into a joke apparently already
>> exists.  NAT64 and NAT46, look it up!  (and yeah, I can see the use if
>> you really have IPv4 only devices)
>>
>
> Teredo is actually in the Windows 8.1 EULA (and IIRC the 8.0 version
> said you weren't supposed to disable it).
>
> "g.	IPv6 Network Address Translation (NAT) Traversal service
> (Teredo). Each time you start your licensed computer, Teredo will
> attempt to locate a public Internet Protocol version 6 (IPv6) service on
> the Internet. This occurs automatically when your licensed computer is
> connected to a public or private network, but does not occur on managed
> networks such as enterprise domains. If you use a program that requires
> Teredo to use IPv6 connectivity, or if you configure your firewall to
> always enable IPv6 connectivity, then Teredo will periodically contact
> the Microsoft Teredo service over the Internet. The only information
> sent to Microsoft is standard computer information and the name of the
> service requested (for example teredo.ipv6.microsoft.com). The
> information sent from your computer by Teredo is used to determine if
> your computer is connected to the Internet and if it can locate a public
> IPv6 service. Once the service is located, information is sent to
> maintain a connection with the IPv6 service."
>
> Further links:
>
> <https://en.wikipedia.org/wiki/Teredo_tunneling>
>
> Note the bit "As of IETF89, Microsoft plans to deactivate their Teredo
> servers for Windows clients in the first half of 2014 (exact date TBD),
> and encourage the deactivation of publicly operated Teredo relays."
>
> I have no idea if MS got around to that or not.
>
> From 2005, "Using IPv6 and Teredo"
>
> <https://technet.microsoft.com/en-us/library/bb457042.aspx>
>

Teredo is quite horrible, forget it. In fact there are three tunnel 
protocols present in Windows, teredo, 6to4 and isatap.