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Instruction Manual
26
Native VNC Client
This system implements the VNC protocol, so any o-the-shelf VNC client can be used.
There are several dierent VNC clients available, all of which should work with this
system, as the system automatically detects and makes use of certain extensions to the
basic RFB protocol as provided by the VNC clients.
The best client currently is TightVNC (http://www.tightvnc.com). Binaries are available
for Windows, Linux, MacOS and many versions of Unix. Source code for all clients is
available there too. This version of VNC is being actively developed.
The authoritative version of VNC is available from RealVNC (http://www.realvnc.com).
This source base is the original version of VNC, maintained by the original developers
of the standard. For a commercial, supported version of VNC, you should consider
TridiaVNC (www.tridiavnc.com). Their version of VNC is a superset of TightVNC and
contains a number of enhancements for use in a larger corporate environment.
NOTE: Some native VNC clients may require a ag or setting indicating they should use
BGR233 encoding by default. If this ag is not set, you may see a garbled picture and
the client will fail. The Unix versions of VNC require the ag -bgr233. For examples on
using this ag, review the commands in the following section.
SSH Tunnel (with Native VNC client)
If you are using Openssh, the following Unix command is appropriate based on the
default settings on a machine at 10.0.0.34:
ssh -f -l admin -L 15900:127.0.0.1:5900 10.0.0.34 sleep 60
vncviewer -bgr233 127.0.0.1::15900
Same command, but using the WAN port:
ssh -f -l admin -L 15900:127.0.0.1:5900 10.0.0.98 sleep 60
vncviewer -bgr233 127.0.0.1::15900
NOTE:
• A copy of these commands, with appropriate values lled in for your current system
setting, is provided in the on-line help page. This allows you to “cut-and-paste” the
required commands accordingly.
• You have 60 seconds to type the second command before the SSH connection will
be terminated.
• The port number “15900” is arbitrary in the above example and can be any number
(1025...65535). It is the port number used on your client machine to connect your
local SSH instance with the VNC client. If you want to tunnel two or more systems,
you will need to use a unique number for each instance on the same SSH
client machine.