From owner-freebsd-questions@FreeBSD.ORG  Wed Jan  3 09:46:24 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id 071AC16A403
	for <freebsd-questions@freebsd.org>;
	Wed,  3 Jan 2007 09:46:24 +0000 (UTC) (envelope-from on@cs.ait.ac.th)
Received: from mail.cs.ait.ac.th (mail.cs.ait.ac.th [192.41.170.16])
	by mx1.freebsd.org (Postfix) with ESMTP id A028813C458
	for <freebsd-questions@freebsd.org>;
	Wed,  3 Jan 2007 09:46:19 +0000 (UTC) (envelope-from on@cs.ait.ac.th)
Received: from banyan.cs.ait.ac.th (banyan.cs.ait.ac.th [192.41.170.5])
	by mail.cs.ait.ac.th (8.13.1/8.12.11) with ESMTP id l039XvCq029100
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO);
	Wed, 3 Jan 2007 16:33:57 +0700 (ICT)
Received: (from on@localhost)
	by banyan.cs.ait.ac.th (8.13.3/8.12.11) id l039Yj5a092403;
	Wed, 3 Jan 2007 16:34:45 +0700 (ICT)
Date: Wed, 3 Jan 2007 16:34:45 +0700 (ICT)
Message-Id: <200701030934.l039Yj5a092403@banyan.cs.ait.ac.th>
From: Olivier Nicole <on@cs.ait.ac.th>
To: mo.babaei@gmail.com
In-reply-to: <5bf3a41f0701030128gd2ce04wb6fe8df882aa80e2@mail.gmail.com>
	(mo.babaei@gmail.com)
References: <5bf3a41f0701030128gd2ce04wb6fe8df882aa80e2@mail.gmail.com>
X-Virus-Scanned: on CSIM by amavisd-milter (http://www.amavis.org/)
Cc: freebsd-questions@freebsd.org
Subject: Re: Setting another machine as a firewall
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: Wed, 03 Jan 2007 09:46:24 -0000

> i want to set another machine as a firewall for my mail server to prevent
> receiving huge number of spams each day.
> so, how shuold i change my DNS to do this ?

Have your MX reccord to point to the firewall mail server.

But before you do that, you should make sure that the firewall is
set-up and configured and running.

Olivier