From owner-freebsd-security Sun Dec 10 22:15:39 2000 From owner-freebsd-security@FreeBSD.ORG Sun Dec 10 22:15:37 2000 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mercury.ccmr.cornell.edu (mercury.ccmr.cornell.edu [128.84.231.97]) by hub.freebsd.org (Postfix) with ESMTP id 33FCD37B400 for ; Sun, 10 Dec 2000 22:15:37 -0800 (PST) Received: from opal.ccmr.cornell.edu (IDENT:0@opal.ccmr.cornell.edu [128.84.231.116]) by mercury.ccmr.cornell.edu (8.9.3/8.9.3) with ESMTP id BAA27572 for ; Mon, 11 Dec 2000 01:15:36 -0500 Received: from localhost (mitch@localhost) by opal.ccmr.cornell.edu (8.9.3/8.9.3) with ESMTP id BAA16672 for ; Mon, 11 Dec 2000 01:15:35 -0500 X-Authentication-Warning: opal.ccmr.cornell.edu: mitch owned process doing -bs Date: Mon, 11 Dec 2000 01:15:35 -0500 (EST) From: Mitch Collinsworth To: freebsd-security@FreeBSD.ORG Subject: Re: DHCP beats MAC Address In-Reply-To: <20001211005915.D9158@pir.net> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Mon, 11 Dec 2000, Peter Radcliffe wrote: > Jeremiah Gowdy probably said: > > Indeed, the cable modem does remember your MAC address, HOWEVER, rather than > > resetting it, if you use DHCP, and you're using one of the services like > > @Home that has an account number for the address, like CX13245125-A, then > > the second computer to DHCP with the account number gets the address without > > Every cable modem I've seen in the US, although I have not seen the > @home ones, filters on MAC addresses and only allows N through (where > N is normally one or you pay for more). The cable modem lets through > the first N MAC addresses it sees. > > In this case you have no choice but to reset the modem or change the > MAC address. > > This has been hashed through on several FreeBSD lists before. Well like you said you haven't seen the @home setup. Jeremiah's description matches my experience with @home. You can use multiple systems (i.e. mac addresses) without resetting the cable modem, but you have to re-use the account #. -Mitch To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message