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Date:      Tue, 11 May 1999 02:11:54 -0500 (EST)
From:      Alfred Perlstein <bright@rush.net>
To:        Michael Maxwell <drwho@xnet.com>
Cc:        freebsd-questions@FreeBSD.ORG
Subject:   Re: Natd and ipfw dilemma...
Message-ID:  <Pine.BSF.3.96.990511020952.24802V-100000@cygnus.rush.net>
In-Reply-To: <19990511013235.C2583@drwho.xnet.com>

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On Tue, 11 May 1999, Michael Maxwell wrote:

> Ok, I've been working on this for quite a while now and don't quite know
> how to proceed...
> 
> First, the specifics:
> I'd like to be able to connect an internal network on the 192.168.16.x
> address range, but still be able to connect to the outside world via an
> assigned IP address from my ISP (via modem with pppd).
> 
> I know this is possible with natd and ipfw, but I'm not sure how.  What
> address should I assign to the "gateway" machine?  Should I give it the
> internal net address?  Or the external?  In other words, which interface
> should I alias, ppp0 or xl0 (ethernet)?

you want to run it on the outside interface, ppp0.

but better yet, I find that userland ppp is a good alternative
and has the natd ability if run with the -alias option (ppp -alias ...)

-Alfred




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