The following command will show you which software is accessing which ports.
To run the command, hit the Windows Start button then type CMD in the command Window and hit enter. This opens a Command Window where you enter the netstat command and all of the parameters shown.
netstat -a -b -n
This dumps a long list of TCP port usage. If you look for Flash you should see port 843 assigned to it.
Xpress Ports Usage (Random Port means the OS will decide on a port that is available)
Local Project
Random Port = Webserver
Random Port = Flash Socket
843 = Flash Policy Server
Remote Machine
80 = Webserver
21 = FtpServer (used for Project and Firmware downloads to the XPR unit)
1235 = Flash Socket (this can be changed but problems will arise since parts of Xpress has it hard coded to 1235)
843 = Flash Policy Server