From owner-freebsd-net@FreeBSD.ORG Mon Sep 19 03:33:22 2005 Return-Path: <owner-freebsd-net@FreeBSD.ORG> 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 9FFFC16A41F for <net@freebsd.org>; Mon, 19 Sep 2005 03:33:22 +0000 (GMT) (envelope-from brett@lariat.org) Received: from lariat.org (lariat.net [65.122.236.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0993543D45 for <net@freebsd.org>; Mon, 19 Sep 2005 03:33:21 +0000 (GMT) (envelope-from brett@lariat.org) Received: from anne-o1dpaayth1.lariat.org (IDENT:ppp1000.lariat.net@lariat.net [65.122.236.2]) by lariat.org (8.9.3/8.9.3) with ESMTP id VAA28158; Sun, 18 Sep 2005 21:33:12 -0600 (MDT) X-message-flag: Warning! Use of Microsoft Outlook renders your system susceptible to Internet worms. Message-Id: <6.2.3.4.2.20050918212944.08cf8d80@localhost> X-Mailer: QUALCOMM Windows Eudora Version 6.2.3.4 Date: Sun, 18 Sep 2005 21:33:09 -0600 To: Dave+Seddon <dave-dated-1127532248.1d1f09@seddon.ca> From: Brett Glass <brett@lariat.org> In-Reply-To: <1127100248.18218.TMDA@seddon.ca> References: <6.2.3.4.2.20050918205708.08cff430@localhost> <1127100248.18218.TMDA@seddon.ca> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed Cc: net@freebsd.org Subject: Re: Efficient use of Dummynet pipes in IPFW X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD <freebsd-net.freebsd.org> List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>, <mailto:freebsd-net-request@freebsd.org?subject=unsubscribe> List-Archive: <http://lists.freebsd.org/pipermail/freebsd-net> List-Post: <mailto:freebsd-net@freebsd.org> List-Help: <mailto:freebsd-net-request@freebsd.org?subject=help> List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-net>, <mailto:freebsd-net-request@freebsd.org?subject=subscribe> X-List-Received-Date: Mon, 19 Sep 2005 03:33:22 -0000 At 09:24 PM 9/18/2005, Dave+Seddon wrote: >skipto >man ipfw -> e.g. ipfw add 10 skipto 4000 all from any to any layer2 out It's not that simple. Each rule that can send packets into a pipe has at least two conditions (e.g. IP address, interface name, and in or out via that interface). Do you propose that I apply DeMorgan's theorem to every rule that sends packets into a pipe? If I did, I'd produce a whole long list of "skipto" rules for each individual rule I had before. Could get very messy -- and create overhead. --Brett Glass