From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 10 Jan 2001 16:08:57 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 10 Jan 2001 16:08:39 -0500 Received: from [216.151.155.116] ([216.151.155.116]:8711 "EHLO belphigor.mcnaught.org") by vger.kernel.org with ESMTP id ; Wed, 10 Jan 2001 16:08:17 -0500 To: crosser@average.org (Eugene Crosser) Cc: linux-kernel@vger.kernel.org Subject: Re: 2.4.0 tcp over firewall - no connection In-Reply-To: <93igfm$ooc$1@pccross.average.org> From: Doug McNaught Date: 10 Jan 2001 16:07:52 -0500 In-Reply-To: crosser@average.org's message of "10 Jan 2001 23:25:26 +0300" Message-ID: User-Agent: Gnus/5.0806 (Gnus v5.8.6) XEmacs/21.1 (20 Minutes to Nikko) 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 crosser@average.org (Eugene Crosser) writes: > I noticed rather strange behavior: stock 2.4.0 with old ISA 3Com > on UP compiled as UP cannot open TCP connection to hosts behind a > firewall. E.g. it is impossible to go to http://www.etrade.com/ - > connect just never finishes. 2.2.17 on the same hardware works > right. 2.4.0 on SMP over PPP connection works right too. MTU > is 1500 in both cases. In both cases, kernel is compiled with > netfilter as modules, but those are not loaded. Known problem, exhaustively discussed on the list, and not related to your NIC. Disable ECN (explicit congestion notification), either in your kernel compile or in /proc/sys/. -Doug - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/