TigerVNC - ArchWiki - Arch Linux
https://wiki.archlinux.org/title/TigerVNCOn the server side, vncserver or x0vncserver must be run. When running either one of these, it is recommended to use the localhost option in ~/.vnc/config or the -localhost switch (for x0vncserver ) since it allows connections from the localhost only and by analogy, only from users ssh'ed and authenticated on the box.
VNC Quick Start Instructions
www.astron.nl › lofarwiki › dokuThe display number defines which virtual screen the vncserver runs on, and differentiates among several concurrent VNC sessions. The display number has the format “:n” where n a small integer number. On windows, by default the vnc server shows the console desktop and is :0 (so runs on port 5900/5800).