SSH, VNC, Windows

Boyd D. Mills BMills "at"
Wed, 09 Jan 2002 15:55:35 +0000

Thanks Michael,

There is a key described at
called LoopbackOnly.

I was a little surprised that this key was not already created with the
default of 0.  I had to create the key LocalMachine\Software\ORL\WinVNC\
key: LoopbackOnly value 1.

This does cause WinVNC to only accept connections from the local machine.

But that's only half the battle.

All the documentation I have found so far on SSH describes how to redirect
ports when initiated from the client side.

But I need to configure the OpenSSH server to redirect incoming Browser
connections to WinVNC.  That's the first major hurdle.

I still need help in this regard.


mailto:BMills "at"
Sr. Software Project Manager

On Tue, Jan 08, 2002 at 04:36:19PM -0500, Boyd D. Mills wrote:
> The requirement is to ENFORCE secure access to VNC through the web
> browser.  The first thing is to configure OpenSSH on the server
> machine to effectively sit between VNC server and the remote browser
> machine.  The second (hopefully two in the same) is to disable
> unsecure connections to VNC.

Take a look at the AllowLoopback and AuthHosts advanced options:

If you allow loopback access and deny all hosts except, you
can limit network access to those being forwarded by SSH.  This will
also allow unencrypted connections from the localhost, but that probably
is not a problem.
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