From owner-freebsd-net@FreeBSD.ORG  Thu Apr 21 14:53:46 2005
Return-Path: <owner-freebsd-net@FreeBSD.ORG>
Delivered-To: freebsd-net@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 59C9116A4CE
	for <freebsd-net@freebsd.org>; Thu, 21 Apr 2005 14:53:46 +0000 (GMT)
Received: from c00l3r.networx.ch (c00l3r.networx.ch [62.48.2.2])
	by mx1.FreeBSD.org (Postfix) with ESMTP id B95B943D1F
	for <freebsd-net@freebsd.org>; Thu, 21 Apr 2005 14:53:45 +0000 (GMT)
	(envelope-from andre@freebsd.org)
Received: (qmail 68717 invoked from network); 21 Apr 2005 14:55:36 -0000
Received: from unknown (HELO freebsd.org) ([62.48.0.53])
          (envelope-sender <andre@freebsd.org>)
          by c00l3r.networx.ch (qmail-ldap-1.03) with SMTP
          for <andre@netvision.com.br>; 21 Apr 2005 14:55:36 -0000
Message-ID: <4267BE79.972245F4@freebsd.org>
Date: Thu, 21 Apr 2005 16:53:45 +0200
From: Andre Oppermann <andre@freebsd.org>
X-Mailer: Mozilla 4.8 [en] (Windows NT 5.0; U)
X-Accept-Language: en
MIME-Version: 1.0
To: Andre <andre@netvision.com.br>
References: <20050421145256.GA50738@server.home>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
cc: freebsd-net@freebsd.org
Subject: Re: How to set the source IP of TCP connections?
X-BeenThere: freebsd-net@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net>
List-Post: <mailto:freebsd-net@freebsd.org>
List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>,
	<mailto:freebsd-net-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 21 Apr 2005 14:53:46 -0000

Andre wrote:
> 
> How can I open a TCP connection with a source IP
> address that's not configured on the machine?
> 
> I've created a proxy (like Squid but for another
> protocol), and I use ipfw fwd to get the client's
> TCP connections to this proxy.
> 
> The problem is that the connections that the proxy
> open have the source IP address of the machine where
> the proxy is running on.
> 
> What I'd like to do is to use the IP address of the
> client as the source IP address of connections opened
> by the proxy for that client.
> 
> Any way to do this in FreeBSD 4 or 5?

No.

-- 
Andre