Karl Auer wrote:
>> host <-> home UPnP NAT <-> Carrier UPnP NAT <-> Internet
>> <-> Carrier UPnP NAT <-> home UPnP NAT <-> host
>
> "Trivially"? I think this looks much nicer:
>
> host <-> Internet <-> host
Yes, if only the Internet were uniform.
However, compared to
V6 incapable V6 capable
host <-> Internet<-> home router <-> Internet <->
6/4 tunnel V6 capable 6/4 tunnel V6 capable
end point <-> Internet <-> end point <-> Internet <->
V6 incapable
home router <-> Internet <-> host
which can often be:
V6 incapable V6 capable
host <-> Internet<-> home router <-> Internet <->
6/4 tunnel V6 *INCAPABLE* 6/4 tunnel V6 capable
end point <-> Internet <-> end point <-> Internet <->
V6 incapable
home router <-> Internet <-> host
>> host <-> home UPnP NAT <-> Carrier UPnP NAT <-> Internet
>> <-> Carrier UPnP NAT <-> home UPnP NAT <-> host
is just trivial and uniform.
> The way it used to be before NAT, and the way, with IPv6, it can be
> again.
With IPv6, see above.
Masataka Ohta
