From owner-freebsd-isp@FreeBSD.ORG Wed May 10 18:21:00 2006 Return-Path: X-Original-To: freebsd-isp@freebsd.org Delivered-To: freebsd-isp@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id F41A116A91B for ; Wed, 10 May 2006 18:20:59 +0000 (UTC) (envelope-from ck-lists@cksoft.de) Received: from mx11.cksoft.de (mx11.cksoft.de [62.111.66.11]) by mx1.FreeBSD.org (Postfix) with ESMTP id ADA8543DE8 for ; Wed, 10 May 2006 18:18:43 +0000 (GMT) (envelope-from ck-lists@cksoft.de) Received: from vesihiisi.cksoft.de (unknown [192.168.64.10]) (using TLSv1 with cipher EDH-RSA-DES-CBC3-SHA (168/168 bits)) (No client certificate requested) by mx12.cksoft.de (Postfix) with ESMTP id CDC88B992; Wed, 10 May 2006 20:18:41 +0200 (CEST) Received: from vesihiisi.cksoft.de (localhost [127.0.0.1]) by vesihiisi.cksoft.de (Postfix) with ESMTP id F136A1EA1; Wed, 10 May 2006 20:18:38 +0200 (CEST) Received: by vesihiisi.cksoft.de (Postfix, from userid 1000) id 29E091F73; Wed, 10 May 2006 20:18:33 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by vesihiisi.cksoft.de (Postfix) with ESMTP id 280651EA3; Wed, 10 May 2006 20:18:33 +0200 (CEST) Date: Wed, 10 May 2006 20:18:33 +0200 (CEST) From: Christian Kratzer X-X-Sender: ck@vesihiisi.cksoft.de To: Marcin Jessa In-Reply-To: <20060510164027.c552315b.lists@yazzy.org> Message-ID: <20060510201432.L13351@vesihiisi.cksoft.de> References: <200605100317.k4A3Hawi019632@puremail.eis.net.au> <015201c67408$30388a50$42764eca@ilo.skyinet.net> <20060510164027.c552315b.lists@yazzy.org> X-Spammer-Kill-Ratio: 75% MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Virus-Scanned: by AMaViS cksoft-s20020300-20031204bz on vesihiisi.cksoft.de Cc: freebsd-isp@freebsd.org, fooler , ernie@puremail.eis.net.au Subject: Re: Can sendmail listen for SMTP on two prots at once? X-BeenThere: freebsd-isp@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Christian Kratzer List-Id: Internet Services Providers List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 10 May 2006 18:21:02 -0000 Hi, On Wed, 10 May 2006, Marcin Jessa wrote: > No need to run yet another instance of SMTP. > Just use a little netcat trick for that. > Install /usr/ports/net/netcat or use the one from base, > put something like following line to /etc/inetd.conf and start inetd: > > x11 stream tcp nowait root /usr/local/bin/nc nc -n -w 3 127.0.0.1 25 > > This will accept connections to x11's port - 6000 and > forward them to port 25 on localhost. which will most likely create an open relay because the sendmail will see the connection as coming from localhost. This will also break logging as netcat will hide the real client ip from the sendmail logs. All in all very bad advice. Greetings Christian -- Christian Kratzer ck@cksoft.de CK Software GmbH http://www.cksoft.de/ Phone: +49 7452 889 135 Fax: +49 7452 889 136