With the latest Dist-upgrade, it appears the VNC security settings have been changed which means I cannot access my Pi through VNC until they are changed back. I have SSH access.
As the Pi is over 100 miles away I would like to find a way of changing the security settings to enable me to connect with VNC again without having to be present. I remotely connect to a PC on the remote network and I have SSH access to the PI through that PC.
The error I get when trying to connect is "Error in TightVNC Viewer. No security types supported. Server sent security types, but we do not support any of them"
To make the answers to the question as useful as possible to anyone with a similar problem in the future I will phrase it as follows.
Using only SSH how can I ensure I have suitable VNC security settings?