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Date:      Wed, 14 Apr 1999 15:26:10 +0200
From:      Thomas Seidmann <tseidmann@SIMULTAN.CH>
To:        "thomas.uhrfelt@plymovent.se" <thomas.uhrfelt@plymovent.se>
Cc:        "'freebsd-net@freebsd.org'" <freebsd-net@FreeBSD.ORG>
Subject:   Re: steps in networking
Message-ID:  <37149772.AE041694@simultan.ch>
References:  <01BE8681.3FC5E6B0.thomas.uhrfelt@plymovent.se>

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Thomas Uhrfelt wrote:
> 
> Is there anyone out there that could write up a little "manual" of the
> different steps on what to do/edit to accomplish the below description
> using FreeBSD + ipfw + NAT or FreeBSD + IPF + IPNAT..
> 
> INTERNAL (192.168.1.xx) ------ (192.168.1.1)FreeBSD box(192.168.2.2)
> -------- (192.168.2.1)Congo Router(Dynamic IP)-------Internet
[stuff deleted]

I'm afraid you cannot handle this case with neither NAT variant
mentioned above, since you need a public IP address on the machine doing
the actual NAT. So you have basically two possibilities:
1. Perform NAT on the router itself, provided it can (I guess it
doesn't)
2. Connect the FreeBSD box directly to the Internet, i.e. replace the
router with it  - that's what I'm doing at our site (medium business).
Depending on the interface your router has to connect to your ISP you
may need to obtain a sychronous communication adapter - we are using
SDLComm's N2, i.e. the FreeBSD 'sr' device.

Let me know if I can help you in case you choose the 2nd variant, though
it's nicely documented in the FreeBSD Handbook and natd(8).

> Thomas Uhrfelt

Cheers,
Thomas

-- 
==========================================================
Thomas Seidmann
Simultan AG, CH-6246 Altishofen, Switzerland
mailto:tseidmann@simultan.ch           tel +41.62.7489000
http://www.simultan.ch/~thomas         fax +41.62.7489010
==========================================================


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