Where it lives
Arma Reforger doesn't use a traditional .cfg file — the entire server configuration is one JSON file, server.json, at the root of your server's File Manager. Spawnly generates a working default on first boot, and the server reads it fresh on every start (via the -config launch flag), so any edit takes effect on your next restart.
The default configuration
{
"dedicatedServerId": "spawnly-server",
"region": "EU",
"game": {
"name": "Spawnly Arma Reforger Server",
"password": "",
"scenarioId": "{59AD59368755F41A}Missions/21_GM_Eden.conf",
"maxPlayers": 16,
"visible": true,
"crossPlatform": true,
"gameProperties": {
"serverMaxViewDistance": 2500,
"fastValidation": true,
"networkViewDistance": 1000,
"battlEye": true
}
}
}What each field does
| Field | What it controls |
|---|---|
game.name | The name shown in the in-game server browser. |
game.password | Join password. Empty string means no password. |
game.scenarioId | Which scenario/mission loads on start. The default is the Conflict Everon "Game Master Eden" scenario — swap this for any other scenario ID to change what your server runs. |
game.maxPlayers | Player slot limit. |
game.visible | Whether the server is publicly listed in the in-game browser. |
game.crossPlatform | Allows PC and console players to join together. |
gameProperties.serverMaxViewDistance / networkViewDistance | How far terrain and other players render/sync, in meters. |
gameProperties.fastValidation | Speeds up mod/addon signature validation on join. |
gameProperties.battlEye | Toggles BattlEye anti-cheat. |
To find other scenario IDs, check the scenario's details in the Arma Reforger Workshop or the game's official scenario list — each has its own unique ID in the same {HEX}Path/To/Scenario.conf format.
Adding mods
This same file is also where Workshop mods get referenced, via a mods array added under game — see Installing Mods on Arma Reforger for the exact format.
Next steps
Back up your server before experimenting with scenario changes — see Managing Backups & Restoring Your Server.