From owner-freebsd-security Mon Dec 11 3:59: 2 2000 From owner-freebsd-security@FreeBSD.ORG Mon Dec 11 03:58:56 2000 Return-Path: Delivered-To: freebsd-security@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 06AEA37B6E9 for ; Mon, 11 Dec 2000 03:58:14 -0800 (PST) Received: from jamus.xpert.com (jamus.xpert.com [199.203.132.17]) by mx1.FreeBSD.org (Postfix) with ESMTP id B15FB6E2D44 for ; Sun, 10 Dec 2000 23:22:14 -0800 (PST) Received: from roman (helo=localhost) by jamus.xpert.com with local-esmtp (Exim 3.12 #5) id 145NCe-0003Lk-00; Mon, 11 Dec 2000 09:16:52 +0200 Date: Mon, 11 Dec 2000 09:16:52 +0200 (IST) From: Roman Shterenzon To: David Erickson Cc: Subject: Re: MAC Address In-Reply-To: <005801c06335$4b35afc0$cc02a8c0@columbia.mentis.org> 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, David Erickson wrote: > > Sounds to me all this is just_slightly_unethical_if > > _not_bordering_on_illegal. This is a topic for a security mailing list? > > I thought we were here to boost network security, not circumvent it. > > Just a network technician's opinion. > > How is it unethical to change ones MAC address? First of all a MAC address > is only used on your local LAN segment. MAC Addresses do not traverse over > IP. Once your traffic hits a router the traffic is then relayed. ARP is The most interesting question is if I know some mac address on a switched network and then I set my mac address to this address, if some switches _will_ deliver packets to me as well? It might be interesting sniffing strategy on a switched network if some switches work this way. Thoughts? --Roman Shterenzon, UNIX System Administrator and Consultant [ Xpert UNIX Systems Ltd., Herzlia, Israel. Tel: +972-9-9522361 ] To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message