KRFB Localhost option

Want to remote desktop from one linux machine to another. Both are running KDE and I can get a vnc connection working between them using krfb and krdc. I want to secure this further by wrapping it in an SSH tunnel, and from what I can find, --localhost used to be an option but is not anymore. Is there a newer method for securing this connection over SSH?

Thanks and apologies if this is an imbecilic question, reading the man page and searching this forum did not yield any results for me :slight_smile: