From owner-freebsd-hackers@FreeBSD.ORG Wed Feb 18 10:39:25 2009 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id DEED01065672 for ; Wed, 18 Feb 2009 10:39:25 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.cran.org.uk (brucec-1-pt.tunnel.tserv4.nyc4.ipv6.he.net [IPv6:2001:470:1f06:c09::2]) by mx1.freebsd.org (Postfix) with ESMTP id 9BCF68FC0C for ; Wed, 18 Feb 2009 10:39:25 +0000 (UTC) (envelope-from bruce@cran.org.uk) Received: from muon.cran.org.uk (localhost [127.0.0.1]) by muon.cran.org.uk (Postfix) with ESMTP id 57A3719014; Wed, 18 Feb 2009 10:39:24 +0000 (GMT) X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on muon X-Spam-Level: X-Spam-Status: No, score=-2.3 required=8.0 tests=BAYES_00,NO_RELAYS autolearn=ham version=3.2.5 Received: from tau.draftnet (unknown [IPv6:2a01:348:10f:0:21e:ecff:fef5:fd4f]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by muon.cran.org.uk (Postfix) with ESMTPSA; Wed, 18 Feb 2009 10:39:24 +0000 (GMT) Date: Wed, 18 Feb 2009 10:39:03 +0000 From: Bruce Cran To: xorquewasp@googlemail.com Message-ID: <20090218103903.5aee2d7d@tau.draftnet> In-Reply-To: <20090218085715.GA9821@logik.internal.network> References: <20090218083424.GA62198@logik.internal.network> <20090218114128.B73352@mp2.macomnet.net> <20090218085715.GA9821@logik.internal.network> X-Mailer: Claws Mail 3.7.0 (GTK+ 2.14.7; amd64-portbld-freebsd8.0) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: freebsd-hackers@freebsd.org Subject: Re: Simulating bad network conditions X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Feb 2009 10:39:26 -0000 On Wed, 18 Feb 2009 08:57:15 +0000 xorquewasp@googlemail.com wrote: > On 2009-02-18 11:42:00, Maxim Konovalov wrote: > > > > ipfw(8) prob + dummynet(8). > > > > Hi. Thanks for the quick response. > > Is there, by any chance, an equivalent for PF? I see there's 'ALTQ' > but it looks to be poorly supported (unless I misunderstand). I have > quite a complicated setup here with PF forwarding and jails and I'm > not sure how well ipfw will play along. ALTQ can drop 20% of packets using something like: block in proto icmp probability 20% It seems ALTQ can't delay packets though, so you'd need to use dummynet for that. -- Bruce Cran