From owner-freebsd-net@FreeBSD.ORG Tue Feb 10 14:08:16 2004 Return-Path: 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 070D516A4CE for ; Tue, 10 Feb 2004 14:08:16 -0800 (PST) Received: from mail08b.verio.de (mail08b.verio.de [213.198.55.74]) by mx1.FreeBSD.org (Postfix) with SMTP id 4139543D1D for ; Tue, 10 Feb 2004 14:08:15 -0800 (PST) (envelope-from testuser1@mdolze.de) Received: from www802.verio.de (213.198.55.132) by mail08b.verio.de (RS ver 1.0.90vs) with SMTP id 3-042818888; Tue, 10 Feb 2004 23:08:08 +0100 (CET) Received: (from root@localhost) by www802.verio.de (SGI-8.12.5/8.12.5/Submit) id i1AM8Cvg11314750; Tue, 10 Feb 2004 23:08:12 +0100 (CET) Message-Id: <200402102208.i1AM8Cvg11314750@www802.verio.de> Content-Disposition: inline Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset="ISO-8859-1" MIME-Version: 1.0 From: "=?ISO-8859-1?Q?Markus Dolze?=" To: freebsd-net@freebsd.org Date: Tue, 10 Feb 2004 23:08:12 +0100 X-Mailer: AutoBahn Webmail X-Originating-Ip: 82.82.235.123 X-Loop-Detect: 1 Subject: FreeBSD's pppd and l2tpd: connection stalls X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: =?ISO-8859-1?Q?Markus Dolze?= List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 10 Feb 2004 22:08:16 -0000 Hello, I have problems with net/l2tpd. The people at their mailing list can't help me and it seems to be a problem with pppd, so I write to the list. Situation: I'm using L2TP over IPsec to secure a wireless lan. The lan connection itself works fine. The IPsec connection works fine (transport mode). System: FreeBSD 5.2-RELEASE-p2 Problem: When I'm transfering a large file (it is *reproducable* with mozilla-source-1.6.tar.gz) transfer via ftp over the L2TP connection, the connections always stalls at the same point (number of transfered bytes). This also happens without IPSec. I had a look with ethereal at the L2TP traffic, L2TP packets are fine, but the ppp packets insist mostly of 0x00 and ethereal reports 'bad ppp content type'. The file contains a lot of 0x00 at the position the transfer stalls. L2tpd uses pppd for the ppp connection. I tried setting MRU and MTU, but that doesn't help much (the number of transfered byte grew about 100). Disabling VJ header compression seems to have positive effect, too. Questions: Are there any issues known with pppd 2.3.5? Any ideas? Can anybody verify this? Regards Markus Dolze