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Date:      Tue, 3 Oct 2000 18:25:52 -0500 (CDT)
From:      Mike Meyer <mwm@mired.org>
To:        Doug Lee <dgl@visi.com>
Cc:        questions@freebsd.org
Subject:   Re: Help going from DSL to dialup
Message-ID:  <14810.27392.553139.867653@guru.mired.org>
In-Reply-To: <575604@toto.iv>

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Doug Lee writes:
> I run FreeBSD 4-STABLE connected to the Internet via DSL with a static
> IP.  I use ipfw and natd to grant Internet access for my LAN.  I am now
> moving and will not have DSL but will have dialup access with a dynamic
> IP.  I hope to regain DSL or similar service soon but can't do it right
> away.

Having made that transition myself, you have my sympathy. Not that
it's hard, but moving from always-there internet to dialup is a PITA.

> What is the easiest way I can convert this system to provide the same kind
> of nat/firewall service based on a dynamic dialup connection?  I assume it
> will involve userland ppp, which has NAT capability built in; but I'd
> prefer to minimize the impact on my system configuration, since I expect
> this dialup access to be a temporary arrangement.  I'm also not yet a pro
> with the features of userland ppp, having never had to use it before.

Userland ppp is a good choice, as the man pages are excellent. Also
look at /etc/ppp/ppp.conf. Userland ppp also has some firewall
capabilities, which may be sufficient for your uses. Once you get ppp
working to your FreeBSD box, turn on NAT and gateway_enable (in
rc.conf), and you're pretty much done. If you weren't using the
internal IP address of the FreeBSD box as a gateway, you'll have to
tweak the rest of the LAN for that. But that should do it.

	<mike



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