On Tue, 20 Mar 2001 11:32:37 +0000, Mark Rainford <[EMAIL PROTECTED]> wrote:
>
> You can try a kind of two level security without any code changes by
> simply using two servers in a master-slave arrangement. We use this
> technique to export view only copies of our control room applications.
>
> Here's how it could work for you: the presenter controls one Vnc server
> - the "master". The audience connects to the "slave" Vnc server using
> the advertised password. On the slave server you run vncviewer full
> screen, displaying a view-only copy of the master Vnc server. Now your
> presenter can operate the display, watched by an audience which can only
> look without touching.
>
> Okay, so you cannot stop someone killing the vncviewer in the middle
> (F8-> menu->Send F8->Quit), but presumably you trust your community
> since you gave them the slave password.
>
> A further advantage is that the load due to many viewers is borne at the
> slave.
You can run the slave on a Linux machine without a window manger
(equivalent to full screen on Windows). You'll have 2 advantages:
1. The Linux is speedier and can have more connections.
2. You can apply my patches (posted here on 30/07/00) to make it
view-only so user keys/mouse are ignored (they can not kill it).
Ehud.
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