Yes. If someone knows enough to spoof their IP address they'll know enough to spoof their MAC address as well. It's really not that difficult. My only argument for it would be one additional level of security you could have. The more the merrier, as long as you plan well enough to be able to support your own plan. -Shawn ----- Shawn R. Quillman Robert Bosch Corporation RBNA/CSA1 38000 Hills Tech Drive Farmington Hills, MI 48331 (248) 553-1164 (P) (248) 848-6969 (F) shawn.quillman@xxxxxxxxxxxx -----Original Message----- From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] Sent: Friday, April 02, 2004 9:51 AM To: [ISAserver.org Discussion List] Subject: [isalist] Access Control via MAC address http://www.ISAserver.org Hi everyone, This is for everyone who things that access control via MAC address has any value over IP address or user account. SMAC Official Website: http://www.klcconsulting.net/smac/ :-) HTH, Tom ------------------------------------------------------ List Archives: http://www.webelists.com/cgi/lyris.pl?enter=isalist ISA Server Newsletter: http://www.isaserver.org/pages/newsletter.asp ISA Server FAQ: http://www.isaserver.org/pages/larticle.asp?type=FAQ ------------------------------------------------------ Other Internet Software Marketing Sites: Leading Network Software Directory: http://www.serverfiles.com No.1 Exchange Server Resource Site: http://www.msexchange.org Windows Security Resource Site: http://www.windowsecurity.com/ Network Security Library: http://www.secinf.net/ Windows 2000/NT Fax Solutions: http://www.ntfaxfaq.com ------------------------------------------------------ You are currently subscribed to this ISAserver.org Discussion List as: shawn.quillman@xxxxxxxxxxxx To unsubscribe send a blank email to $subst('Email.Unsub')