From owner-freebsd-net@FreeBSD.ORG Thu Aug 24 11:44:12 2006 Return-Path: X-Original-To: net@freebsd.org 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 D0B0016A4EE for ; Thu, 24 Aug 2006 11:44:12 +0000 (UTC) (envelope-from nvass@teledomenet.gr) Received: from matrix.teledomenet.gr (dns1.teledomenet.gr [213.142.128.1]) by mx1.FreeBSD.org (Postfix) with ESMTP id 37D2B43D46 for ; Thu, 24 Aug 2006 11:44:10 +0000 (GMT) (envelope-from nvass@teledomenet.gr) Received: from iris ([192.168.1.71]) by matrix.teledomenet.gr (8.12.10/8.12.10) with ESMTP id k7OBi8EY029146 for ; Thu, 24 Aug 2006 14:44:08 +0300 From: Nikos Vassiliadis To: net@freebsd.org Date: Thu, 24 Aug 2006 14:43:27 +0300 User-Agent: KMail/1.9.1 MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200608241443.28431.nvass@teledomenet.gr> Cc: Subject: "high speed" tcp connections over pptp terminate unexpectedly 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: Thu, 24 Aug 2006 11:44:12 -0000 Hi all, I have a weird problem. It seems that tcp over pptp can not handle high speeds and connections terminate with no obvious reasons(at least to me). The tcpdump is from 6-STABLE, but I also have a 7-CURRENT machine I can test/try things. I have tried with fetch, konqueror and opera. The results are the same every time, the connection will reset eventually. When I switch my default gateway to a router everything works as expected. mpd doesn't print anything. Any thoughts, suggestions tcpdump readers? example ftp session nik:0:~$ fetch ftp://ftp.belnet.be/mirror/rsync.gentoo.org/gentoo/releases/x86/2006.0/livecd/livecd-i686-installer-2006.0.iso livecd-i686-installer-2006.0.iso 13% of 696 MB 492 kBps 20m52s fetch: transfer timed out fetch: livecd-i686-installer-2006.0.iso appears to be truncated: 100136960/730388480 bytes tcpdump where the reset happens 14:04:24.266162 IP 213.142.144.100.54456 > 193.190.198.20.38723: . ack 53514792 win 32832 14:04:24.270371 IP 193.190.198.20.38723 > 213.142.144.100.54456: P 53514792:53516160(1368) ack 1 win 49248 14:04:24.270546 IP 193.190.198.20.38723 > 213.142.144.100.54456: . 53516160:53517528(1368) ack 1 win 49248 14:04:24.270556 IP 213.142.144.100.54456 > 193.190.198.20.38723: . ack 53517528 win 32148 14:04:24.270775 IP 193.190.198.20.38723 > 213.142.144.100.54456: P 53517528:53518896(1368) ack 1 win 49248 14:04:24.270807 IP 213.142.144.100.54456 > 193.190.198.20.38723: . ack 53518896 win 32832 14:04:24.273327 IP 193.190.198.20.38723 > 213.142.144.100.54456: P 53518896:53520264(1368) ack 1 win 49248 14:04:24.273454 IP 193.190.198.20.38723 > 213.142.144.100.54456: . 53520264:53521632(1368) ack 1 win 49248 14:04:24.273465 IP 213.142.144.100.54456 > 193.190.198.20.38723: . ack 53521632 win 32148 14:04:24.273740 IP 193.190.198.20.38723 > 213.142.144.100.54456: P 53521632:53523000(1368) ack 1 win 49248 14:04:24.273775 IP 213.142.144.100.54456 > 193.190.198.20.38723: . ack 53523000 win 32832 14:04:24.274088 IP 213.142.144.100.54456 > 193.190.198.20.38723: R 1:1(0) ack 53523000 win 32832 14:04:24.275729 IP 193.190.198.20.38723 > 213.142.144.100.54456: P 53523000:53524368(1368) ack 1 win 49248 Thanks in advance, Nikos