Damn, was hoping for a quick and easy explanation... I guess I'll just throw this mystery onto the shelf with the others, although it's getting a bit crowded... -----Original Message----- From: Thomas W Shinder [mailto:tshinder@xxxxxxxxxxx] Sent: Friday, April 01, 2005 09:06 To: [ISAserver.org Discussion List] Subject: [isalist] RE: ISA Reports http://www.ISAserver.org Hi Dan, Explanation for the entries on ISA reports is one of the great unsolved mysteries of modern industrialized nations. Tom www.isaserver.org/shinder Tom and Deb Shinder's Configuring ISA Server 2004 http://tinyurl.com/3xqb7 MVP -- ISA Firewalls -----Original Message----- From: Ball, Dan [mailto:DBall@xxxxxxxxxxx] Sent: Friday, April 01, 2005 7:55 AM To: [ISAserver.org Discussion List] Subject: [isalist] ISA Reports http://www.ISAserver.org Just curious, why would the ISA reports show that 97.7% of March traffic was from an unknown OS, when I know it is over 99% WinXP?