From owner-freebsd-net@FreeBSD.ORG Tue Jan 30 13:16:37 2007 Return-Path: X-Original-To: net@freebsd.org Delivered-To: freebsd-net@FreeBSD.ORG Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 08B5216A4A7 for ; Tue, 30 Jan 2007 13:16:37 +0000 (UTC) (envelope-from mav@alkar.net) Received: from cmail.optima.ua (cmail.optima.ua [195.248.191.121]) by mx1.freebsd.org (Postfix) with ESMTP id 8340213C46B for ; Tue, 30 Jan 2007 13:16:36 +0000 (UTC) (envelope-from mav@alkar.net) Received: from [212.86.226.11] (account mav@alkar.net [212.86.226.11] verified) by cmail.optima.ua (CommuniGate Pro SMTP 5.0.11) with ESMTPA id 20298249; Tue, 30 Jan 2007 15:16:35 +0200 Message-ID: <45BF4532.7060203@alkar.net> Date: Tue, 30 Jan 2007 15:16:34 +0200 From: Alexander Motin User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.8b) Gecko/20051108 MIME-Version: 1.0 To: Nikos Vassiliadis References: <1169850194.00677461.1169839202@10.7.7.3> <1170080583.00678976.1170067803@10.7.7.3> <45BE3C17.3070606@alkar.net> <200701301226.35612.nvass@teledomenet.gr> In-Reply-To: <200701301226.35612.nvass@teledomenet.gr> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: net@freebsd.org Subject: Re: ng_pptpgre problems: tcp connections reset unexpectedly. TCP guru needed! 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: Tue, 30 Jan 2007 13:16:37 -0000 Nikos Vassiliadis wrote: >>>It seems to work with disabled windowing. If you are interested in >>>tracking down this, I would be glad to help. >> >>I will try to look into it. If you will have some more interesting >>results send them to me. > > I can provide you a pptp peer to connect to. I can reproduce it > easily from home, I am opening a pptp tunnel over the pppoe > connection and it happens frequently. Last night I was thinking of it and I was able to reproduce this sometimes, but it was not predictable. For this moment I have no idea about reason of this problem. There is one problem with windowing in ng_pptpgre and I am now working on it, but it can only results in packet losses, but not in connection reset. I think we need some TCP guru to understand this. -- Alexander Motin mav@alkar.net Optima Telecom