From owner-freebsd-net Wed May 24 9: 0:31 2000 Delivered-To: freebsd-net@freebsd.org Received: from silby.com (cb34181-a.mdsn1.wi.home.com [24.14.173.39]) by hub.freebsd.org (Postfix) with SMTP id AD05E37B639 for ; Wed, 24 May 2000 09:00:27 -0700 (PDT) (envelope-from silby@silby.com) Received: (qmail 21288 invoked by uid 1000); 24 May 2000 16:00:25 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 24 May 2000 16:00:25 -0000 Date: Wed, 24 May 2000 11:00:25 -0500 (CDT) From: Mike Silbersack To: Olaf Hoyer Cc: freebsd-net@FreeBSD.ORG Subject: Re: BPF vs. promiscuous mode In-Reply-To: <4.1.20000524105140.00a108d0@mail.rz.fh-wilhelmshaven.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Wed, 24 May 2000, Olaf Hoyer wrote: > >> BSD or Linux, some program/trick/whatsoever that pretends(return to arp > >> queries) a different MAC adress than stored on the ROM of the NIC. > > > >Changing the MAC address of a NIC is extremely simple, it's easily done > >even in windows - don't single out students who run unix as troublemakers. > Yes, thats what I meant. > Extremely simple? Then you know something I don't know yet- examples/names > of programs-drivers/URLs? Well, under windows, it's just a setting in the advanced properties in my tulip's drivers (but it's not there with my pnic.) Under linux, it's just an ifconfig option - I forget the exact command line, it's been a while. I'm sure the man page lists it, though. Under FreeBSD, changing your MAC address isn't directly supported yet, but there are patches in the mailing list archives for compiling a kernel module which will allow you to do it. All in all, it's easy. > Well, yes, thats the major issue, but as I also belong to that big group > (some administration is done in the dorm internally) and my personal box > also is hooked up to that LAN, so I have a vital personal interest. > Because I have to work under Winblows frequently due to various reasons > related to study topics and work I do (making some money on support etc.) I > have some reasons to care... > > Real problem is the implemenatation style of that network, that each room > where the puter is, is private, so only way to enforce some policy is to > pull the user. Hm, it could be worse than that. With a hub style setup, I'm not sure how you could trace back who the offender is if he's good. Mike "Silby" Silbersack To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message