From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Sat, 22 Feb 2003 18:32:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Sat, 22 Feb 2003 18:32:34 -0500 Received: from pizda.ninka.net ([216.101.162.242]:58842 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Sat, 22 Feb 2003 18:32:33 -0500 Date: Sat, 22 Feb 2003 15:26:26 -0800 (PST) Message-Id: <20030222.152626.100079402.davem@redhat.com> To: wa@almesberger.net Cc: Valdis.Kletnieks@vt.edu, linux-kernel@vger.kernel.org Subject: Re: RFC3168, section 6.1.1.1 - ECN and retransmit of SYN From: "David S. Miller" In-Reply-To: <20030222154539.H2791@almesberger.net> References: <1045874822.25411.3.camel@rth.ninka.net> <200302220048.h1M0mjCu020837@turing-police.cc.vt.edu> <20030222154539.H2791@almesberger.net> X-FalunGong: Information control. X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) 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 From: Werner Almesberger Date: Sat, 22 Feb 2003 15:45:39 -0300 4) Back off quickly (i.e. disable ECN on first retry), but keep track of whom you had to do this for. Then use some clever user-mode strategy module to act on this information. (E.g. send a list of ECN offenders to root, or raise the threshold value for turning off ECN for destinations that seem to accept ECN in general, but suffer high losses.) Time to write an ipt_ECNLOG.c netfilter module :-)