default run vnc server port 5900
running vnc server in listining mode port 5500

You canset VNC to wait on a different port. First run VNC server and uncheck the display number auto check mark.
in the registry hkey current user>software>orl>winvnc3 set the port number to decimal and then choose the port number you want it to wait on. I just set this up for stephan cori. Open and foward ports on the linksys, and you can get to multiple machines through the firewall from the outside. they love it!!!
in answer book under VNC PORTS