Hi Lurent,

e.g. :

you join two companies ( lets name them "A" and "B" ) using overlapping
private adress-space.

Lets assume "A" has a Fileserver.A at 192.168.2.1.

Users on Company B like to acces Fileserver.A using - but at "B" they
have their Mailserver.B at 192.168.2.1.
So the network form Company A needs to be hidden behind NAT so that
192.168.2.1 at A is accessed by something else from B using e.g.
192.168.202.1.  ( or any other feasible address ).

And beause "A" has several 1000 Systems which should be accessed by "B"
it would be a big deal when querying the DNS from A - would lead to a
response with a NATted IP-Address "B" could use instead the "real" A
IP-Address which are paritally in use at "B" too.

....

-----Original Message-----
From: Laurent CARON [mailto:[EMAIL PROTECTED]
Sent: Thursday, September 11, 2008 3:30 PM
To: Stefan Sczekalla
Cc: misc@openbsd.org
Subject: Re: nat - DNS-ALG ... Translating DNS for "Twice-NAT"

Stefan Sczekalla wrote:
> Hi Laurent,
>
> The Problem I like to solve is:
>
> Hiding a Network by nat while keeping it accessible via DNS without
> translating every natted IP manually on a local DNS-Server.

Maybe i'm completely stupid but i *really* don't see the goal of this.

- You've got a private network.
- You want to hide it from the internet
- You use NAT
- You use the same domain on the external internet and on your internal
LAN
- Why not using a split DNS config ?

Maybe there is too many assumptions ;)

Please tell me if i'm wrong ;)

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