From owner-freebsd-net@FreeBSD.ORG Wed Sep 5 18:58:41 2007 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BB63E16A420 for ; Wed, 5 Sep 2007 18:58:41 +0000 (UTC) (envelope-from mav@FreeBSD.org) Received: from cmail.optima.ua (cmail.optima.ua [195.248.191.121]) by mx1.freebsd.org (Postfix) with ESMTP id 3E1D513C45D for ; Wed, 5 Sep 2007 18:58:40 +0000 (UTC) (envelope-from mav@FreeBSD.org) X-Spam-Flag: SKIP X-Spam-Yversion: Spamooborona 1.7.0 Received: from [212.86.226.226] (account mav@alkar.net HELO [192.168.3.2]) by cmail.optima.ua (CommuniGate Pro SMTP 5.1.10) with ESMTPA id 30158928; Wed, 05 Sep 2007 21:58:26 +0300 Message-ID: <46DEFC4F.7060802@FreeBSD.org> Date: Wed, 05 Sep 2007 21:58:23 +0300 From: Alexander Motin User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.13) Gecko/20060414 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Mihai Tanasescu References: <1189016608.00796469.1189004406@10.7.7.3> In-Reply-To: <1189016608.00796469.1189004406@10.7.7.3> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-net@freebsd.org Subject: Re: Freebsd MPD PPTP X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 05 Sep 2007 18:58:41 -0000 Hi. Mihai Tanasescu wrote: > I'm using MPD4 to establish a PPTP VPN from my FreeBSD 6.2 server to > some clients and I've started encountering some strange problems. > > The connection goes well, everything functions accordingly but after a > while (very random, can be 5 minutes, 1 hour, 8 hours) I loose > connectivity (the clients' Windows icon show packet are being sent, but > nothing is received). A tcpdump on the external interface shows no > packets going out and the same for tcpdump on ng0 (although I'm not sure > if it should display something here). Tcpdump on ng0 interface should display traffic inside tunnel. It also may be interesting to look on internal interface as tcpdump is able to decode PPTP packets. > For what I've seen the ip address on the ng0 interface disappears. This may be significant. Configure syslog for logging mpd messages, it should give you information about why IP disappeared. Probably it happened in result of some error. Also look to the messages logs, there may be something interesting. -- Alexander Motin