Re: Let's Focus on Moving Forward Re: V6 still not supported

[Owen DeLong via NANOG]

> On Mar 29, 2022, at 17:51 , Masataka Ohta <mo...@necom830.hpcl.titech.ac.jp> 
> wrote:
> 
> Owen DeLong wrote:
> 
>>> As I repeatedly pointed out, end to end NAT is clean preserving
>>> the universal peer to peer nature of the Internet.
>> Nope… It really isn’t.
> 
> Wrong.
> 
>> The problem of audit trail opacity is still a major issue with any form
>> of stateful NAT.
> 
> How poorly you understand NAT.
> 
> As I wrote in my draft:
> 
>   Depending on how port numbers are shared, there are static and
>   dynamic E2ENAT or combinations of them. With static E2ENAT, an end
>   host is assigned port numbers statically, which is necessary for a
>   server with a stable IP address and a port number.
> 
> static E2ENAT is not, with your questionable terminology, stateful.
> 
> It is even possible to construct legacy NAT which dynamically,
> thus statefully, assign ports only from some static range,
> which does not need state maintenance, for each private IP
> address.
> 
>                                               Masataka Ohta

It still suffers from a certain amount of opacity across administrative domains.

Owen