From owner-freebsd-questions@FreeBSD.ORG  Fri Aug 27 12:23:43 2010
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 24D701065673
	for <freebsd-questions@freebsd.org>;
	Fri, 27 Aug 2010 12:23:43 +0000 (UTC)
	(envelope-from patfbsd@davenulle.org)
Received: from smtp.lamaiziere.net (net.lamaiziere.net [91.121.44.19])
	by mx1.freebsd.org (Postfix) with ESMTP id DF16D8FC1C
	for <freebsd-questions@freebsd.org>;
	Fri, 27 Aug 2010 12:23:42 +0000 (UTC)
Received: from baby-jane.lamaiziere.net (unknown [192.168.1.10])
	by smtp.lamaiziere.net (Postfix) with ESMTP id E4A7963316B
	for <freebsd-questions@freebsd.org>;
	Fri, 27 Aug 2010 14:05:35 +0200 (CEST)
Received: from localhost (localhost [127.0.0.1])
	by baby-jane.lamaiziere.net (Postfix) with ESMTP id 4E3842CEC21
	for <freebsd-questions@freebsd.org>;
	Fri, 27 Aug 2010 14:07:17 +0200 (CEST)
Date: Fri, 27 Aug 2010 14:07:13 +0200
From: Patrick Lamaiziere <patfbsd@davenulle.org>
To: freebsd-questions@freebsd.org
Message-ID: <20100827140713.41391a3e@davenulle.org>
In-Reply-To: <96E6F9A3-49F5-4C55-8248-6D62717636DF@lafn.org>
References: <96E6F9A3-49F5-4C55-8248-6D62717636DF@lafn.org>
X-Mailer: Claws Mail 3.7.6 (GTK+ 2.20.1; i386-portbld-freebsd8.0)
Mime-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 8bit
Subject: Re: Routing Question
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 27 Aug 2010 12:23:43 -0000

Le Thu, 26 Aug 2010 18:17:19 -0700,
Doug Hardie <bc979@lafn.org> a écrit :

>  PF's route_to will return the packets to the proper router, but I have not
> been able to figure out which ones those would be.  The source IP
> address can be any on either network and its highly likely that we
> will see packets from the same source network on both at the same
> time.  The only distinction I see in the input packets between the
> two paths is the MAC address of the router.  I don't see any way in
> pf or the system to use that to affect the return path
> though.

the filter option "reply-to" looks to be what you need. It works by
keeping the state of a connection (see pf.conf(5)).