Nah... he's probably using the same API that NLB uses when run in Unicast mode. NLB "overwrites" the physical MAC address with a virtual one. If the tool is just a GUI, then yes, there are other ways to do the same. However, if it has a command line equivalent? That could be helpful. :) One of the other things that I've always missed on Windows is the ability to set the duplex and speed of a NIC from the command line. Cordially yours, Jerry G. Young II MCSE (4.0/W2K) Atlanta EES Implementation Team Lead ECNS Microsoft Engineering Unisys 11493 Sunset Hills Rd. Reston, VA 20190 Office: 703-579-2727 Cell: 703-625-1468 THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers. -----Original Message----- From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf Of John T (Lists) Sent: Wednesday, July 19, 2006 1:35 AM To: isapros@xxxxxxxxxxxxx Subject: [isapros] Re: FW: Technitium MAC Address Changer v3.1 (FREEWARE) What is he talking about changing a registry entry? How does changing a registry entry change the MAC hard coded onto the NIC? Does the software include some sort of ROM flasher? John T eServices For You "Seek, and ye shall find!" > -----Original Message----- > From: isapros-bounce@xxxxxxxxxxxxx [mailto:isapros-bounce@xxxxxxxxxxxxx] On Behalf > Of Thomas W Shinder > Sent: Tuesday, July 18, 2006 8:23 PM > To: isapros@xxxxxxxxxxxxx > Subject: [isapros] FW: Technitium MAC Address Changer v3.1 (FREEWARE) > > I hope they removed the MAC addresses control from the DCR list ;) > > > Thomas W Shinder, M.D. > Site: www.isaserver.org > Blog: http://blogs.isaserver.org/shinder/ > Book: http://tinyurl.com/3xqb7 > MVP -- ISA Firewalls > > > -----Original Message----- > From: Shreyas Zare [mailto:shreyasonline@xxxxxxxxx] > Sent: Tuesday, July 18, 2006 1:52 PM > To: pen-test@xxxxxxxxxxxxxxxxx > Subject: Technitium MAC Address Changer v3.1 (FREEWARE) > > Hello Everybody, > > Here is a FREEWARE tool that I have coded called > Technitium MAC Address Changer, which allows you to > change Machine Access Control (MAC) Address of your > Network Interface Card (NIC) irrespective to your NIC > manufacturer or its driver. You can find this tool > even on Security Focus website at > http://www.securityfocus.com/tools/3936. It has a very > simple user interface and provides ample of > information regarding each NIC in the machine. Every > NIC has an MAC address hard coded in its circuit by > its manufacturer. This hard coded MAC address is used > by windows drivers to access Ethernet Networks (LAN). > This tool can set a new MAC address to your NIC, > bypassing the original hard coded MAC address. > Technitium MAC Address Changer v3.1 is a must tool in > every security professionals tool box. Technitium MAC > Address Changer v3.1 is coded in Visual Basic 6.0. > > There are some famous commercial tools available in > the market for as much as US$19.99, but Technitium MAC > Address Changer is available for FREE. (We don't > charge for just changing an registry value! Also > knowing how this works does'nt require extensive > research as some commercial tool providers claim!) > > To Download Visit > http://www.technitium.com/software/mac_changer_v3.1/mac_changer_v3.1.htm > l > > Regards > > Shreyas Zare > eMail: shreyas@xxxxxxxxxxxxxx > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com > > ------------------------------------------------------------------------ > ------ > This List Sponsored by: Cenzic > > Concerned about Web Application Security? > Why not go with the #1 solution - Cenzic, the only one to win the > Analyst's > Choice Award from eWeek. As attacks through web applications continue to > rise, > you need to proactively protect your applications from hackers. Cenzic > has the > most comprehensive solutions to meet your application security > penetration > testing and vulnerability management needs. You have an option to go > with a > managed service (Cenzic ClickToSecure) or an enterprise software > (Cenzic Hailstorm). Download FREE whitepaper on how a managed service > can > help you: http://www.cenzic.com/news_events/wpappsec.php > And, now for a limited time we can do a FREE audit for you to confirm > your > results from other product. Contact us at request@xxxxxxxxxx for > details. > ------------------------------------------------------------------------ > ------ > > >