Space Engineers whitelisting is handled with a Steam group. When a Steam Group ID is set, only members of that Steam group should be able to join the server.
Enable Steam Group Whitelist
- Create or choose the Steam group you want to use for the whitelist.
- Invite every allowed player to that Steam group.
- Find the group ID: How to find a Steam Group ID.
- Open your Space Engineers server in the control panel.
- Click Configuration Files.
- Open
worlds\SpaceEngineers-Dedicated.cfgwith Config Editor.
- Set Whitelist Steam GroupID to the Steam group ID.

- Click Save & Exit, then restart the server.
To disable the whitelist, set Whitelist Steam GroupID back to 0 and restart the server.
