From owner-freebsd-hackers Fri Nov 9 7:30:22 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from smtpproxy1.mitre.org (smtpproxy1.mitre.org [129.83.20.90]) by hub.freebsd.org (Postfix) with ESMTP id 637E737B417 for ; Fri, 9 Nov 2001 07:30:15 -0800 (PST) Received: from avsrv1.mitre.org (avsrv1.mitre.org [129.83.20.58]) by smtpproxy1.mitre.org (8.11.3/8.11.3) with ESMTP id fA9FU2814943; Fri, 9 Nov 2001 10:30:02 -0500 (EST) Received: from MAILHUB1 (mailhub1.mitre.org [129.83.20.31]) by smtpsrv1.mitre.org (8.11.3/8.11.3) with ESMTP id fA9FU1s15802; Fri, 9 Nov 2001 10:30:01 -0500 (EST) Received: from dhcp-105-164.mitre.org (128.29.105.164) by mailhub1.mitre.org with SMTP id 8233236; Fri, 09 Nov 2001 10:28:45 -0500 Message-ID: <3BEBF651.A0E2A12A@mitre.org> Date: Fri, 09 Nov 2001 10:29:21 -0500 From: Jason Andresen Organization: The MITRE Corporation X-Mailer: Mozilla 4.75 [en]C-20000818M (Windows NT 5.0; U) X-Accept-Language: en MIME-Version: 1.0 To: tlambert2@mindspring.com Cc: Leo Bicknell , freebsd-hackers@freebsd.org Subject: Re: SIS 900 Onboard NIC /w SIS 735 Chipset Motherboard. References: <2AACFCDB6086274CA42D44085EF1BAA229405F@msm-001.msg.stcorp.com> <15338.62167.240104.199613@guru.mired.org> <20011108164512.A54891@ussenterprise.ufp.org> <3BEB0CC9.451A4B0F@mindspring.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Terry Lambert wrote: > > Leo Bicknell wrote: > > * Users wish to replace a card but have it use the same MAC > > address due to filters, static arp entries, caches that take too > > long to expire, bootp entries that are based on MAC address, etc. > > For years cards had the MAC in a separate ROM to make this possible > > with a chip swap too. > > I forgot this one. > > Mostly, though, this is done for licensing software that uses > the MAC as the machine serial number. Lot of code does that > on Windows... and not a little code on UNIX. Hmm. I seem to remember a few years back when several software shops wanted NIC manufacturers to remove the ability to change the MAC in their cards because they were afraid their MAC based security schemes were being defeated by people throwing in old NICs in their machines, not plugging them in, and then setting them all to the same MAC address. Fortunatly I think this never took off. -- \ |_ _|__ __|_ \ __| Jason Andresen jandrese@mitre.org |\/ | | | / _| Network and Distributed Systems Engineer _| _|___| _| _|_\___| Office: 703-883-7755 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message