Discovering a network address

To connect to a computer, you must obtain a network address uniquely identifying it:

• If you are connecting locally, obtain the computer's private network address. This can be:
• A host name, for example iMac or beethoven.acme.com. Examine the Apple Remote Desktop/Screen Sharing dialog (Mac), or Control Panel > System (Windows).
• An IPv4 address, for example 192.168.2.187. Examine the VNC Server dialog, or run a command such as ifconfig (Mac and Linux) or ipconfig (Windows).
• If you are connecting over the Internet, obtain the computer's public network address. This is typically the IPv4 address of a router protecting the computer, for example 212.44.6.82. To discover it, navigate to www.realvnc.com/cgi-bin/nettest.cgi from a web browser on the computer.

By default, VNC Enterprise Edition and VNC Personal Edition listen on the registered port for VNC, 5900. However, this may change, in which case you must qualify the network address with the new port number when you establish a connection. Note you do not have to specify a port to connect to Apple Remote Desktop/Screen Sharing.

For more information, please read the online guide.