I have installed 42.1 with KDE and enabled remote administration, the box has been rebooted many times but when I try to VNC to the server the error “reading version failed: not an RFB server?” is presented regardless of what VNC client is used (TightVNC/Ultra/Real).
Is anyone able to assist with this please?
Likely a networking issue.
Re-run YaST > Remote Administration
Enable if necessary, and make sure the option to enable the firewall ports is enabled.
Then, if necessary run netstat to check whether your machine is listening on those ports.
Looks like it was some really bad LDAP issues from joining a Windows domain, as it was a new machine I rebuilt it and the issue went away.