From owner-freebsd-questions@FreeBSD.ORG Sat Jul 29 17:23:34 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id E8D0316A57A for ; Sat, 29 Jul 2006 17:23:33 +0000 (UTC) (envelope-from nikolas.britton@gmail.com) Received: from ug-out-1314.google.com (ug-out-1314.google.com [66.249.92.168]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9B4E143D45 for ; Sat, 29 Jul 2006 17:23:32 +0000 (GMT) (envelope-from nikolas.britton@gmail.com) Received: by ug-out-1314.google.com with SMTP id m2so184036uge for ; Sat, 29 Jul 2006 10:23:31 -0700 (PDT) DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=A/netDbQ8S7JuCDTl6gr1GV7jeTqfvFd7QvoC9M4B8fRKzd6q68OGImKP7pghGSOabAIyNpJDOIgT0IqFw+x7kZe6djWFaBUsr2RFr3OaIcY0crbhizILHhGnULcC3NBkTELNB0bpy9D+ofY2wuCBc1xDJ0K2iJ0g6LE+BvC8tk= Received: by 10.78.145.5 with SMTP id s5mr146499hud; Sat, 29 Jul 2006 10:23:31 -0700 (PDT) Received: by 10.78.143.11 with HTTP; Sat, 29 Jul 2006 10:23:30 -0700 (PDT) Message-ID: Date: Sat, 29 Jul 2006 12:23:31 -0500 From: "Nikolas Britton" To: "User Freebsd" In-Reply-To: <20060729021705.F27679@ganymede.hub.org> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <20060728164526.E27679@ganymede.hub.org> <003f01c6b2cb$c42d5bd0$3c01a8c0@coolf89ea26645> <20060729021705.F27679@ganymede.hub.org> Cc: core@freebsd.org, freebsd-questions@freebsd.org, Ted Mittelstaedt Subject: Re: Gotta start somewhere ... how many of us are really out there? X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 29 Jul 2006 17:23:35 -0000 On 7/29/06, User Freebsd wrote: > On Fri, 28 Jul 2006, Ted Mittelstaedt wrote: > > > You might think this sounds harmless but folks have done this kind of > > thing in the past with other products and wreaked havoc on the Internet. > > You can start by referencing "dlink ntp fiasco" in google to get an idea > > of what can happen to these kinds of well meaning attempts. Let > > sleeping dogs lie. > > 'k, you lost me on how this relates to the fiasco ... I did a quick search > on Google for it, and, unless I didn't find the right reference, the > 'fiasco' had to do with DLink setting up their software to ping PHKs NTP > Server, without getting permissions first, and, thereby, flooding him with > NTP requests ... > > > People just don't realize just how very big the Internet is. > > That is the problem, yes ... nobody knows how big the FreeBSD community is > ... :) > I have to agree with Marc on this one. The extra load required to send all of this data is not much: Lets say each client sends 20 bytes and their are 10^7 clients for a total of 190.7MB per month or 6.25MB per day . Now... Lets say 50% (10^6.7) of those clients are set to UTC and 50% of those clients (10^6.4) trigger the monthly periodic over a 5 day period (10^5.7 each day) and all of them phone home within 5 minutes of each other (10^5 per minute) for a total of 1666.67 clients per second. We would need 32.6KB/s or 260.4Kbit/s to handle this load spike... I did the calculations for 10 million clients, but I highly doubt FreeBSD has 5 million so this is a non issue. -- BSD Podcasts @: http://bsdtalk.blogspot.com/ http://freebsdforall.blogspot.com/