Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1762515AbWLJUV5 (ORCPT ); Sun, 10 Dec 2006 15:21:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1762549AbWLJUV5 (ORCPT ); Sun, 10 Dec 2006 15:21:57 -0500 Received: from livid.absolutedigital.net ([66.92.46.173]:1686 "EHLO mx2.absolutedigital.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1762515AbWLJUV4 (ORCPT ); Sun, 10 Dec 2006 15:21:56 -0500 Date: Sun, 10 Dec 2006 15:21:51 -0500 (EST) From: Cal Peake To: Jan Engelhardt cc: Linux Kernel Mailing List Subject: Re: Window scaling problem? In-Reply-To: Message-ID: References: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1392 Lines: 34 On Sun, 10 Dec 2006, Jan Engelhardt wrote: > for some reason unknown to me, some TCP connections just hang or get > reset after some kilobytes have been transferred. I suppose it is a > router with broken window scaling, but I can not say for sure from > the tcpdump logs. I observed the exact same behavior on a client's network not too long ago which used a Cyberguard firewall as a NAT gateway. I didn't have time to fully look into it but disabling TCP window scaling in Linux allowed me to work without problems. > If anyone could take a look, I'd be grateful. Kernel currently > running is 2.6.18.5, but I have seen this with 2.6.17 I was running > two months ago too, so I do not suspect a kernel bug. I saw this with kernels v2.6.16, v2.6.17, and v2.6.18. Windows XP however didn't seem to have any problems. So unless Windows doesn't have window scaling on by default (or uses a workaround) it could be a broken kernel. Wish I could be more help... - C. -- "There is nothing wrong with your television set. Do not attempt to adjust the picture. We are controlling transmission." -- The Outer Limits - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/