Public/testing 4to6 gateway?

Rick Ernst nanog at
Tue Jul 14 14:20:31 UTC 2009

Pedantry is not necessarily a bad thing, especially when the student doesn't
know the right questions to ask. :)

6in4 is what I was looking for.


On Mon, Jul 13, 2009 at 6:05 PM, Nathan Ward <nanog at> wrote:

> On 14/07/2009, at 4:23 AM, Rick Ernst wrote:
>  Either they don't exist, or my Google-fu is particularly bad this morning.
>> I'm trying to get my toes wet with IPv6.  I've established an internal
>> 6to4/4to6 tunnel.  I'd also like to have a testbed for access to public v6
>> sites.  I'm also trying to find some clue at my upstreams, but figured I'd
>> ask here as well.  Are there any 4to6 gateway available?  I have assigned
>> v6
>> space.
> Because I'm pedantic, 6to4 and 6in4 are two different things. It sounds
> like you want 6in4.
> They use the same encapsulation, but 6to4 has specific magic in how the
> outer IPv4 destination is built, taken from the inner IPv6 destination
> address.
> 6over4 is different again.
> I think someone wrote a draft explaining this a while back.. not sure where
> or what it was called.
> --
> Nathan Ward

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