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Contents

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

Configuring ports

By default, VNC Server listens for connections on a particular port. In addition, VNC Server (Enterprise) and VNC Server (Personal) listen for VNC Viewer for Java download requests on a different port. You can change these ports, or make them the same.

Note: VNC Server (Free) does not listen for VNC Viewer for Java download requests. Upgrade the host computer to VNC Server (Enterprise) or VNC Server (Personal) if this feature is important to you.

By default, two separate ports are assigned when VNC Server starts, one for connections and one for download requests:

•  Under Windows and Mac OS X, VNC Server in both Service Mode and User Mode is assigned port 5900 for connections and port 5800 for download requests.

•  Under UNIX/Linux, VNC Server in:

— User Mode is assigned port 5900 for connections and port 5800 for download requests.

— The first instance of VNC Server in Virtual Mode is assigned port 5901 for connections and port 5801 for download requests. Subsequent instances of VNC Server in Virtual Mode are assigned port numbers incremented by one, where possible, for example 5902, 5903 (and 5802, 5803), and so on, up to the maximum number of desktops permitted by the host computer’s license.

Note: For more information about running multiple instances of VNC Server, and the different modes, see Running multiple instances of VNC Server.

If more than one instance of VNC Server is running on a host computer, they must all listen on different ports; see below for information on resolving port conflicts. Note, however, that a particular instance of VNC Server can listen on the same port for connections and download requests; see Making the connection and download port the same for more information.

Note: When connecting to VNC Server, a user must qualify the host computer’s network address with the port number in all cases except when VNC Server is listening for connections on port 5900 only. For more information, see Qualifying a network address with a port number.

Resolving port conflicts

VNC Server must listen for connections and for VNC Viewer for Java download requests on a unique port. This is one on which no other instance of VNC Server, nor any other program or service, is listening.

Port conflicts disable VNC Server. You should be able to resolve them by changing ports on the Connections tab of the VNC Server - Options dialog. More on this dialog.

Changing the connection port

You can change the port on which VNC Server is listening for connections. If you do this:

•  Users need to know the new port number (if it is not 5900) in order to connect. For more information, see Qualifying a network address with a port number.

•  If the host computer is protected by a firewall, then the firewall must be configured to allow incoming network communications to the new port. For more information, see Allowing network communications through a firewall.

•  If the host computer is protected by a router and users are connecting over the Internet, then the router must be configured to forward communications to the new port. For more information, see Configuring a router to forward network communications.

To change the port, enter a different number in the Accept connections on port field. Note that changing this option does not affect currently connected users.

Changing the download port

You can change the port on which VNC Server is listening for VNC Viewer for Java download requests. If you do this:

•  Web browser users need to know the new port number in order to download. For more information, see Qualifying a network address with a port number.

•  If the host computer is protected by a firewall, then the firewall must be configured to allow incoming network communications to the new port. For more information, see Allowing network communications through a firewall.

•  If the host computer is protected by a router and web browser users will connect over the Internet, then the router must be configured to forward communications to the new port. For more information, see Configuring a router to forward network communications.

To change the port, enter a different number in the Serve Java viewer on port field. Note that changing these options does not affect currently connected users.

Making the connection and download port the same

VNC Server can listen on the same port for connections and download requests. This may simplify firewall configuration and make the host computer more secure.

To use the same port, enter the same number in the Accept connections on port and Serve Java viewer on port fields. Note that configuring these options does not affect currently connected users.