AFAIK it's always fallen back on HTTP. From: isalist-bounce@xxxxxxxxxxxxx [mailto:isalist-bounce@xxxxxxxxxxxxx] On Behalf Of Ball, Dan Sent: Friday, April 03, 2009 2:27 PM To: ISA Mailing List Subject: [isalist] Live Messenger Change? I have a rule in my ISA server to block protocols and only allowed MSN/Live Messenger to run for selected people. Today I found someone using it successfully when they were not supposed to be able to. I checked the ISA logs, and it looks to me like it is now using HTTP GET/POST commands to pass through the ISA server instead of the protocols it used to use. Is this correct? When did the Messenger change to start tunneling through HTTP? -------------------------------------------------- Dan Ball Network and Systems Technician Marquette Area Public Schools 1103 West College Avenue Marquette, MI 49855 E-Mail: dball@xxxxxxxxxxx Phone: (906)225-5779 Fax: (906)225-5377 --------------------------------------------------