Re: Numbers of NAT-s in IPv4/IPv6 Network? One or more?

[Fred Templin <ftemplin@iprg.nokia.com>]

This is an interesting question, and I'm certainly no expert on
the subject. But, in theory, couldn't there be more than one NAT
if, e.g., the (multiple) NAT boxes communicated out-of-band
to keep a consistent view of the aggregate state information?
(Then, you get into questions as to whether the multiple NATs
are there for something simple like load balancing/fault tolerance,
or for something more complex like site multi-homing.)

I guess I don't have anything conclusive for you on this, but just
to note that the "must" in your statement: "there must be only
one NAT" may be a bit too strong.

Fred
ftemplin@iprg.nokia.com

Bilajbegovic Damir wrote:

> Case: local network connected to the public IP network
>
> If I understood right, in normally network translation (local IPv4 to public
> IPv4), there must be only one NAT (simplest solution) at the border of
> network. (NAT-PT and all necessarily ALG)
>
> If there is translation between IPv4 intranet and IPv6 public network can
> then be more than NAT-PT? (all intranet is IPv4, and all public is IPv6)
>
> If you know the answer or you can direct me to some document I would be
> grateful.
>         Damir Bilajbegovic
>
> P.S: In translation IPv4/IPv6 there is always translation, and nor IPv4
> user, nor IPv6 server do not see directly each other, they see IPv4 address
> which NAT gives to server, and IPv6 server sees IPv6 address of user by
> which NAT represents user. Every packet will go directly to specific NAT
> (the one who knows translation parameters of connection). So, I do not see
> any problem in translation. I'm I wrong.
>
>
>
>