From owner-freebsd-net@FreeBSD.ORG Thu Jun 26 15:57:51 2003 Return-Path: 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 2941737B401; Thu, 26 Jun 2003 15:57:51 -0700 (PDT) Received: from InterJet.elischer.org (12-233-125-100.client.attbi.com [12.233.125.100]) by mx1.FreeBSD.org (Postfix) with ESMTP id 858E243FE9; Thu, 26 Jun 2003 15:57:50 -0700 (PDT) (envelope-from julian@elischer.org) Received: from localhost (localhost.elischer.org [127.0.0.1]) by InterJet.elischer.org (8.9.1a/8.9.1) with ESMTP id PAA15113; Thu, 26 Jun 2003 15:57:44 -0700 (PDT) Date: Thu, 26 Jun 2003 15:57:43 -0700 (PDT) From: Julian Elischer To: Robert Watson In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII cc: Adam cc: net@freebsd.org Subject: Re: Bandwidth monitoring X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 26 Jun 2003 22:57:51 -0000 I'm not sure I understand why not just tell ipfw to count all packets that an ISP is likely to charge for and have the tables 'reaped every now and then by a daemon to give a time dimension to the data.. On Thu, 26 Jun 2003, Robert Watson wrote: > On 24 Jun 2003, Adam wrote: > > > My ISP is placing strict restrictions on how much I can transfer each > > month, with high penalties for exceeding their limits. However, they > > don't provide any way for their customer's to check to see how much > > they've transferred, so we end up transferring far less than what we are > > allowed, just to make sure we avoid paying the fines for going over the > > limit. > > > > So, what I need to do is find a way to monitor my total bandwidth > > through my external NIC. My gateway is running FreeBSD 4.8 with > > ipf+ipnat. > > > > I *don't* need anything fancy. All I need is to be able to check at any > > time how much I've transferred since the first of the month. What's the > > easiest way to set up something like this? I know there are fancy > > solutions with graphs with usage stats and such, but that's not what I'm > > after. > > > > Thanks for your advice, > > I use the following home-grown tool to measure bandwidth consumed by > the hosts on my ethernet segment: > > http://www.watson.org/~robert/freebsd/bpfmon.tgz > > It uses BPF to monitor traffic on the segment, and drops bandwidth samples > into a data directory every five minutes. there's a post-processing > script that generates a CSV of samples, by local host, for easy > consumption in a spreadsheet. It's not a great program, but it is cute > and works. Make sure to read the README if you use it; you have to set a > few things at compile-time, since I wrote it for local use and never > really attempted to generalize. I use it to monitor inbound and outbound > IP traffic for around 400 hosts here for precisely the same reason you are > interested :-). > > Robert N M Watson FreeBSD Core Team, TrustedBSD Projects > robert@fledge.watson.org Network Associates Laboratories > > > _______________________________________________ > freebsd-net@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "freebsd-net-unsubscribe@freebsd.org" >