VNC User Guide - RealVNC

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Chapter 7: Making Connections Secure The same privileges and VNC permissions are granted as for system authentication. See Authenticating using host computer user credentials on page 98 for more information. Turning authentication off You can turn authentication off for all users. Note you should only do this if you are sure all prospective users are trustworthy. Note: You can allow just particular users to connect without supplying a password. See Bypassing the authentication rules on page 107 for more information. To do this, choose the None option in the Authentication dropdown of the VNC Server - Options dialog. More on this dialog. (Note this option is only available when the dialog is in Advanced mode.) There is no need to publish credentials to prospective users. Once connected, users acquire a set of privileges (that is, access rights) on the host computer enabling particular operations to be performed. The same privileges are granted as for system authentication. See Authenticating using host computer user credentials on page 98 for more information. 106 VNC User Guide
Chapter 7: Making Connections Secure Bypassing the authentication rules You can enable particular users to connect to VNC Server without specifying a password, bypassing VNC Server’s authentication mechanism altogether. Note: You can turn authentication off for all users if you consider it safe to do so. For more information, see Turning authentication off on page 106. You can either: • Establish a reverse connection to a particular client computer. See Establishing a reverse connection on page 107. • Allow a particular user to connect as a Guest. See Allowing a Guest to connect on page 108. Note this remote control feature is not available in VNC Server (Free). Clearly, you should only establish reverse connections to client computers with trustworthy potential users, and only allow trustworthy users to connect as Guests. If you are setting up VNC Server on your own computer for remote access, note that a user must be present at the host computer for either of these features to work. Establishing a reverse connection You may be able to establish a reverse connection to a particular client computer, bypassing the authentication mechanism specified by VNC Server. Note: The client computer must be running Listening VNC Viewer. For more information, see Starting Listening VNC Viewer on page 34. Note this feature is also useful if the host computer is protected by a firewall that cannot be configured to allow network communications, or by a router that cannot be configured to forward network communications, thus preventing incoming connections. In a reverse connection, network communications from the host computer are outgoing. To establish a reverse connection: 1. Open the VNC Server shortcut menu. More on this menu. 2. Select Connect to Listening VNC Viewer: 3. If you are connecting: — Within a private network, enter the network address of the client computer itself. If you do not know what this is, ask a client computer user to run a command such as ipconfig (Windows) or ifconfig (Linux and Mac OS X). VNC User Guide 107
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Contents About This Guide 7 Chapter
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Appendix A: Saving Connections 121
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