VNC server on clients

We have some remote workstations that traditionally have been local 
installs of Ubuntu, but since the offices are connected to our main 
network across fiber we would like to transition to LTSP thick clients. 
 From time to time employees in the main office needs to view the remote 
desktop, either for technical support or support with their job duties. 
Not everyone who helps them should have access to all desktops on our 
network, as epoptes provides, and they will be connecting from multiple 
workstations. In the past we have run remote desktop sharing (vino) 
remotely and used remmina locally to view it. When I try to start vino 
through the gnome-control-center in Ubuntu 20.04 thick clients, it 
refuses to start. Running gnome-control-center from the command line 
shows the following error: "(gnome-control-center:26271): 
sharing-cc-panel-WARNING **: 14:50:14.358: Failed to enable service 
vino-server: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Sharing 
cannot be enabled on this network, status is '0'". Can anybody tell me 
how to get vino working, or recommend another program that allows VNC 
viewers to view a specific LTSP desktop?
-- 
Michael Crider, IT Supervisor
Howell-Oregon Electric Cooperative
West Plains MO
http://www.hoecoop.org


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