Visara Master Console Center Administration Guide - Manual (Page 99)

Chapter 5 MCC system.cfg Configuration File
Administration Guide 99
VNC (Virtual Network Computing) is a product that allows a computer system
environment to be viewed and manipulated from another system across a high-
speed data network. Integrated with the MCC, the VNC product allows a MCC
operator to monitor and control the graphical interface of distributed Windows
NT systems from a single console, namely the MCC terminal. The VNC software:
ƒ Accepts connections from the MCC.
ƒ Accepts inputs including mouse movements and keystrokes from the MCC
workstation.
ƒ Sends the Windows NT GUI interface over the network back to the MCC.
Once installed, the VNC software allows a MCC operator to take full control of
the Windows NT environment from a remote location.
What VNC does in the MCC environment
ƒ VNC displays the graphical user interface of Windows NT systems within the
MCC environment, allowing a MCC operator to manage and control distributed
Windows NT systems.
ƒ VNC accepts the Ctrl-Alt-Del keystroke combination through a button
integrated in the browser’s graphical interface or a softkey in the X-windows
viewer. This allows the MCC operator to initiate a logon sequence from the
command console, and to securely lock the Windows NT system after the
administration tasks are completed.
Note: VNC does not provide a multi-user environment on Windows NT.
All users share the same environment.
Prerequisites
ƒ The VNC executable must be installed on each Windows NT server to be
monitored from the MCC. The executable occupies approximately 175 KB of disk
space on the server. It is installed as a service that runs on start up without
requiring a user to log on.
ƒ Each Windows NT server must have its own command console configured in
the system.cfg file. Examples of how to do this are given in the preceding
Examples section.
ƒ The optional VNC viewer is contained in a 2.5 MB tar file called VNC.tar
that is installed on the MCC. The tar file includes a readme file that provides
installation instructions.
ƒ If a Web browser is used instead of the VNC viewer, the Windows NT
environment is accessed by pointing the browser to
http://:5800
. For example, to access a Windows NT server
called NT4, enter http://NT4:5800.
ƒ VNC is intended for use over a LAN, such as a shared 10BaseT network.
Performance over modem links is generally unacceptable.