[Info-vax] implementing IPv6 on the internet

[Dirk Munk]

David Froble wrote:
> Jan-Erik Soderholm wrote:
>> Den 2016-09-24 kl. 00:05, skrev Dirk Munk:
>>> Jan-Erik Soderholm wrote:
>>>>
>>>> The return package arrives at the WAN address (there is only one,
>>>> don't really know what you mean with "WAN4").
>>>
>>> The IPv4 address of the WAN port
>>>
>>
>> Ah, OK then... :-) I see what you ment now... :-)
>>
>> I thought it was meaningfull to have the NAT thing in the
>> description since David seemed to think that it was based on
>> having the internal address beeing sent to microsoft (in this
>> example) and back again and then used for the routing of the
>> reply package. It is not, it is managed by the NAT function
>> and the internal address is never seen on the outside.
>
> See, I learn something new every day.
>
> First, I'm not arguing against IPv6.  I think it would be great.  But as
> stated by others, there is inertia for IPv4.  Expect that to affect some
> decisions.
>
> That said, what else I am is a problem solver.  Show me a problem, and
> I'll look at it from all angles, come up with one or more potential
> solutions, then evaluate them to try to pick the best solution.
>
> So now I'm being told there is a problem, and no solution.  Sorry, I
> have to (it just happens) think of potential solutions.
>
> Jan-Erik mentions tables in the NAT router.  Memory is cheap.  A NAT
> router could keep a table of data from DNS look-ups, and be able to
> translate, using the table, an IPv4 address to the corresponding IPv6
> address in the table. Could old entries fall off the list?  Sure.
> Nothing is guaranteed.  But unless there is a really large amount of
> activity, it's my guess that most of the time the translation could happen.
>
> That written, NAT can be a PITA ....

This whole thing of trying to keep IPv4 on your LAN is quite funny 
really. There is no reason for it, Windows has a perfect IPv6 stack, and 
it has it since Vista. Macs, Linux have IPv6 stacks too.

The whole discussion reminds me of a video clip of a small dog. The dog 
was standing outside in the door opening, and didn't walk in. Normally 
there would be a glass door there, but the door was open and the dog 
didn't realize it. He assumed the door was closed, and didn't know what 
to do when he was called. It was very funny to see.

And here you have a PC on your LAN that has an IPv6 stack, your router 
can handle IPv6, there is a IPv6 firewall in the router, and still you 
want to run IPv4-only on your LAN. Why ?????