Ready-made commands
announce: a message to every player.announcerestart 5: the game's own restart warning, in each player's language.shutdown 5 "message"andcancelshutdown: shut down with a warning, or call it off.name,descriptionandpassword: change them while the server runs.version,timeandhelp.
The password and port
Set RCON Password in Auto Config or leave it empty and HaruHost makes one. The RCON port is used on the same machine and doesn't need forwarding.
Questions
Do I need an RCON tool?
No. The console is built into HaruHost, on Windows and Linux, and in the web panel on your phone.