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Date:      Mon, 25 Jun 2001 14:52:46 -0500 (CDT)
From:      Nick Rogness <nick@rogness.net>
To:        Tim Erlin <tperlin@yahoo.com>
Cc:        questions@FreeBSD.ORG
Subject:   Re: ipfw  -- fwd, divert, natd -redirect_port?
Message-ID:  <Pine.BSF.4.21.0106251446260.42332-100000@cody.jharris.com>
In-Reply-To: <20010625165405.93596.qmail@web11703.mail.yahoo.com>

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On Mon, 25 Jun 2001, Tim Erlin wrote:

> I currently have 4.3-STABLE running NAT on my DSL(static ip). I'd like
> to put a webserver (or any other service) behind it and map the
> incoming port appropriately. I see three choices with ipfw and I'm not
> sure what the differences are.
> 

	Well, there's only 2  natd and divert are the same.  Besides, you
	need to use nat for this.

> How does fwd differ from divert differ from running natd with
> -redirect_port?

	natd must be run in conjunction with divert (That is how the natd
	daemon receives packets from the kernel).  Like so:

		ipfw divert natd ip from any to any via xl0

	fwd is an ipfw firewall rule extention, like so:

		ipfw fwd 10.0.0.1 ip from any to any out via xl0

Nick Rogness <nick@rogness.net>
 - Keep on Routing in a Free World...
  "FreeBSD: The Power to Serve!"


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