Client Denham comes up with a simple solution for publishing Microsoft Virtual Server’s Web interface VNC control:
"You have to do both a Web Pub Rule and a Server Pub Rule - a la the TSAC website. One Web Pub Rule for the downloading of the ActiveX control and management of the virtual server components and a Server Pub Rule for TCP Inbound 5900 for the VNC component."
Check here for the full thread: http://forums.isaserver.org/Publishing_Virtual_Server_2005_R2/m_2002019656/tm.htm
Thomas W Shinder, M.D.
MVP -- ISA Firewalls