Native vnc client, Ssh tunnel (with native vnc client) – StarTech.com STARVIEW SV441DUSBI User Manual

Page 24

Instruction Manual

Socket Layer) encrypted link that encrypts all data from the session, including the

actual video pictures.
Because Java is considered a “safe” programming language, the Java VNC client has

some limitations. Certain special keystrokes cannot be sent, such as “Scroll Lock” on the

keyboard.
This client software requires the use of Java 2 (JRE 1.4) to enable features like wheel

mouse support. Sun Microsystems’s Java site, www.java.com, is an excellent resource

to ensure your browser and operating system are updated accordingly.

Native VNC Client

This system implements the VNC protocol, so any off-the-shelf VNC client can be used.

There are over 17 different VNC clients available and they should all work with this

system. This system automatically detects and makes use of certain extensions to the

basic RFB protocol that is provided by the better VNC clients.
The recommended client is TightVNC (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 (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 flag or setting indicating they should use

BGR233 encoding by default. If this flag is not set, you may see a garbled picture and

the client will fail. The Unix versions of VNC require the flag -bgr233. For examples on

using this flag, review the commands in the following section.

SSH Tunnel (with Native VNC client)

If you are using openssh, here is the appropriate Unix command to use, 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

Notes:
• A copy of these commands, with appropriate values filled 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.