Project Zomboid Server Admin & RCON Commands: Server Admin Reference
Every Project Zomboid admin command an operator needs: enable RCON in servertest.ini, set access levels, kick and ban by username/SteamID/IP, broadcast and save, change live server options, spawn items and vehicles, and trigger weather and events - plus the headless-RCON gotchas (no-slash syntax, commands that need an online target, and /alarm needing an in-world admin).
Project Zomboid runs a dedicated server that exposes the standard Source RCON protocol, so the same admin verbs you type in the in-game admin chat can be run remotely over RCON. This reference covers enabling RCON, access levels, moderation, server control, spawning, and the events - and flags the commands that behave differently from a headless console.
How Project Zomboid RCON works
Project Zomboid's dedicated server implements the standard Valve Source RCON protocol (TCP), so any standard RCON client works. RCON is configured by two keys in the server config file <servername>.ini (default servertest.ini, found in the Zomboid/Server/ folder):
RCONPort=27015
RCONPassword=your_strong_password
RCON is disabled until RCONPassword is non-empty. Set RCONPort explicitly: it is a separate TCP port from the game's UDP port (default 16261), and the stock config commonly ships it as 27015.
Slash prefix: