UltraVNC - Downloading & Installation Download the free: http://files.mekashron.com/UltraVNC-101-Setup.exe UltrVNC is an Excellent, Fast & Free Remote Control, and File Transfer Program. Check your IP address: http://www.whatismyip.com UltraVNC uses Port 5900, Open port* 5900 in the Router (if you use one) for the VNC Server computer.  How to open/forward port: http://www.portforward.com/english/applications/port_forwarding/UltraVNC/UltraVNCindex.htm  If you use software Firewall or any other application that blocs ports, open port 5900 through the additional applications as well. How to open port in windows firewall: http://www.ndsu.edu/ndsu/its/desktop/windows/open_port.shtml