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About This Guide

Chapter 1: Introduction

Principles of VNC remote control

Getting the computers ready to use

Connectivity and feature matrix

What to read next

Chapter 2: Getting Connected

Step 1: Ensure VNC Server is running on the host computer

Step 2: Start VNC Viewer on the client computer

Step 3: Identify VNC Server running on the host computer

Step 4: Request an encrypted connection

Step 5: Connect to VNC Server

Troubleshooting connection

Chapter 3: Using VNC Viewer

Starting VNC Viewer

Starting Listening VNC Viewer

Configuring VNC Viewer before you connect

Connecting to a host computer

The VNC Viewer user experience

Using the toolbar

Using the shortcut menu

Using the VNC Viewer - Options dialog

Managing the current connection

Changing appearance and behavior

Restricting access to features

Chapter 4: Connecting From A Web Browser

Connecting to a host computer

The VNC Viewer for Java user experience

Working with VNC Viewer for Java

Chapter 5: Exchanging Information

Printing host computer files to a local printer

Transfering files between client and host computers

Copying and pasting text between client and host computers

Communicating securely using chat

Chapter 6: Setting Up VNC Server

Licensing VNC Server

Starting VNC Server

Running multiple instances of VNC Server

Working with VNC Server

Configuring ports

Notifying when users connect

Preventing connections to VNC Server

Restricting functionality for connected users

Stopping VNC Server

Chapter 7: Making Connections Secure

Authenticating connections to VNC Server

Relaxing the authentication rules

Bypassing the authentication rules

Changing the encryption rules

Preventing particular connections to VNC Server

Restricting features for particular connected users

Uniquely identifying VNC Server

Protecting privacy

Appendix A: Saving Connections

Saving connections to VNC Address Book

Using VNC Address Book to connect

Managing connections using VNC Address Book

Saving connections to desktop icons

Previous Next Chapter 6, Setting Up VNC Server

Licensing VNC Server

VNC Server must be licensed. If it is not, users cannot connect.

For more information on the different types of license available, to compare the remote control features provided by each, and to obtain a permanent or a trial license key, visit www.realvnc.com/products/vnc/licensing/.

Applying a license key

You can apply a license key to VNC Server at any time.

You typically do this when you download and install VNC Server. You may subsequently do so in order to renew a support and upgrades contract.

1. Open the VNC Server shortcut menu. More on this menu.

2. Choose Licensing. The VNC Server - Licensing dialog opens.

3. Follow the instructions. Note you may additionally be prompted to configure VNC Server; see Harmonizing VNC Server for more information.

Note: If you do not have access to a graphical user interface when you need to apply a license key, use the vnclicense command line tool instead. For more information, run the command vnclicense -help from the directory in which VNC programs are installed.

Harmonizing VNC Server

When you apply a license key you may additionally be prompted to configure VNC Server. This is typically because your license key entitles you to fewer RealVNC® remote control features than VNC Server is currently configured to use. You must harmonize VNC Server with the license key.

For example, if at the end of a trial you choose to downgrade to VNC Server (Free), you must turn off encryption and system authentication. If you do not, users cannot connect.

Note that it is possible to run more than one instance of VNC Server on a computer (see Running multiple instances of VNC Server). If this is the case, you must harmonize all running instances separately. For example, if under UNIX/Linux you have five instances of VNC Server running, two in User Mode and three in Virtual Mode, and you apply the new license key to the licensing wizard of a particular instance of User Mode, then you must separately configure:

•  The other instance of User Mode.

•  All three instances of Virtual Mode.

Until you do, users will not be able to connect to these instances. Note that administrative privileges may be required to perform this operation if you are not the user who started VNC Server.

Understanding license scope

Under Windows, a VNC Server license key is system-wide. This means it applies to all users with accounts on the computer. Since only two instances of VNC Server can run concurrently on a Windows computer (one in Service Mode, and one in User Mode for the currently logged on user), this means that VNC Server is always licensed for all users.

Under UNIX/Linux and Mac OS X, however, there is another dimension to license scope. The license to use VNC Server not only applies to all computer users, but additionally limits the number of instances of VNC Server that can start. For example, if your license entitles you to five ‘desktops’, attempting to start VNC Server for a sixth time fails. For more information, visit www.realvnc.com/products/vnc/documentation/5.0/licensing-faq/.

Note: You can quickly see how many instances of VNC Server your license permits you to start, and how many of these are currently running. See page 80 for more information.

Note you can start a maximum of five instances of VNC Server (Free) on UNIX/Linux and Mac OS X computers. Upgrade the host computer to VNC Server (Enterprise) or VNC Server (Personal) if flexibility is important to you.