Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265886AbUF2SXG (ORCPT ); Tue, 29 Jun 2004 14:23:06 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265890AbUF2SXG (ORCPT ); Tue, 29 Jun 2004 14:23:06 -0400 Received: from fw.osdl.org ([65.172.181.6]:53145 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S265886AbUF2SXB (ORCPT ); Tue, 29 Jun 2004 14:23:01 -0400 Date: Tue, 29 Jun 2004 11:22:56 -0700 From: Stephen Hemminger To: Debi Janos Cc: linux-kernel@vger.kernel.org, linux-net@vger.kernel.org, "David S. Miller" Subject: Re: 2.6.7-mm1 - 2.6.7-mm4 weird http behavior Message-Id: <20040629112256.58828632@dell_ss3.pdx.osdl.net> In-Reply-To: References: Organization: Open Source Development Lab X-Mailer: Sylpheed version 0.9.10claws (GTK+ 1.2.10; i386-redhat-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1166 Lines: 37 On Tue, 29 Jun 2004 15:20:06 +0200 (CEST) Debi Janos wrote: > I am found an interesting (bug?) feature in kernels between > 2.6.7-mm1 and 2.6.7-mm4 > > Some web pages eg. > > http://www.hup.hu/ > http://portal.fsn.hu/ > http://wiki.hup.hu/ > > is unreachable with these kernels. If i try kernel versions > <= 2.6.7 everything is O.K. above-mentioned all web pages works. > > I try this web pages with some different operating systems > like Windows, OpenBSD, FreeBSD, WinCe... and seems working > fine for me. > > Any idea? Dave enabled the receive buffer auto-tuning which uses TCP window scaling. It looks like all these sites are running FreeBSD, perhaps there is a bug in FreeBSD? As suggested earlier please get a TCP dump of a failed connection. To turn of receive buffer auto-tuning: sysctl -w net.ipv4.tcp_moderate_rcvbuf=0 sysctl -w net.ipv4.tcp_default_win_scale=0 Thanks. - 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/