Yes this is possible.
STEP 1:
Ubunutu supports Remote Desktop sessions by default.
Visit this page https://help.ubuntu.com/stable/ubuntu-help/sharing-desktop.html.de to install GNOME Remote Desktop first on your Ubuntu machine.
In order to let the system use the set VNC password permanently after reach reboot, open the "Password and Keys" application, go to "Login/DefaultKeying", right click to "Change Password" and leave both password boxes empty when asked.
Follow the instruction and enable Remote Desktop Support in the Ubuntu settings.
- Enable the "Enable Legacy VNC Protocol"
- Set the "Request Password" option behind the "Enable Legacy VNC Protocol" settings
- Set the switch "Remote Control" to enable
- Set a user and set a password finally
- Leave the settings dialog
The remote desktop access via VNC clients is now already available via <Ubuntu machine IP address>:5900
STEP 2:
Install the noVNC function that turns VNC based protocol sessions into html5 sessions made for web browsers
Use the following command on your Ubuntu machine
sudo apt install novnc
STEP 3:
For a test start the noVNC function manually with (or create a "Start Application" and insert the line in the command line for an automatic start)
/usr/share/novnc/utils/launch.sh --vnc 127.0.0.1:5900
STEP 4:
Start a web browser session from a different machine with
http://<<Ubuntu machine IP address>:6080/vnc.html
STEP 5:
Login with the password
STEP 6:
Enable the "Remote Control" function for your Ubuntu device in netFIELD Cloud
Configure the "Remote Control Settings" of your Ubuntu device as follows:
host = 127.0.0.1
http port = 6080