Done with x11vnc, like in fat client.
No need enabling LOCAL_APPS at all.
Just
Install x11vnc on chroot environment
# ltsp-chroot --arch=i386 apt-get install x11vnc

Create a password file for x11vnc
# echo "yourpassword" > /opt/ltsp/i386/etc/x11vncpassword

Create an init script to starrt vnc at client boot
# nano /opt/ltsp/i386/etc/init.d/x11-vnc-server
________
#!/bin/bash
### BEGIN INIT INFO
# Provides:          VNC Server
# Required-Start:    x11-common
# Required-Stop:
# Default-Start:     3 4
# Default-Stop:      0 6
# Short-Description: Raise VNC Server
### END INIT INFO

XAUTH=`find /var/run/ -name Xauth*`
VNCBIN=`which x11vnc`
case "$1" in
         start)
                 start-stop-daemon --start --oknodo \
                         --pidfile /var/run/x11vnc.pid --background \
                         --nicelevel 15 --make-pidfile --exec \
                         $VNCBIN -- -display :7  -forever -passwdfile 
/etc/x11vncpassword -nossl -auth $XAUTH
         ;;
         stop)
                 start-stop-daemon --stop --oknodo --pidfile 
/var/run/x11vnc.pid
         ;;
         restart)
                 $0 stop
                 $0 start
         ;;
         *)
                 echo "Usage: $0 start|stop|restart"
         ;;
esac
___________

Insert the script in the init sequence
# chmod+x  /opt/ltsp/i386/etc/init.d/x11-vnc-server
# ltsp-chroot --arch=i386 insserv -v x11-vnc-server

Reboot the clients and try connecting with any vnc capable software
Hope it helps


On 28/10/2015 16:26, g wrote:
> Thanks. It seems a very nice project, an excellent work.
> Just it seems not well trimmed to my needings, because I don't need to
> have remote connections to thinclient from the LTSP server. Often I have
> to connect from random Linux stations without Gnome, sometimes from Win
> stations or maybe from Android.
> So a solution based on VNC or similar is to be preferred.
> I'll try to enable LOCAL_APPS just for x11vnc and see what's came on.
> Epoptes will be useful for another project arising now in my mind ;)
> Thanks for precious suggestion,  Alkis.
> Other suggestions are welcome too.
> giuliano
>
> On 28/10/2015 13:26, Alkis Georgopoulos wrote:
>> http://www.epoptes.org
>>
>> On 28/10/2015 12:46 μμ, g wrote:
>>> Hi. I recently setup a thin client environment (no fat client) with LTSP
>>> on Debian Wheezy server.
>>> Does anyone know which is the best method to remotely control the
>>> clients (like RDP or VNC)?
>>> In fat client environment I used to install X11vnc on the chroot, but
>>> now (on pure thin client environment) all the apps run on the server.
>>> Any clue is appreciated. Thanks
>>>
>>> giuliano
>>>
>>
>> ------------------------------------------------------------------------------
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>>
>
> ------------------------------------------------------------------------------
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