server-settings.json

{
  "name": "Name of the game as it will appear in the game listing",
  "description": "Description of the game that will appear in the listing",
  "tags": ["game", "tags"],

  "_comment_max_players": "Maximum number of players allowed, admins can join even a full server. 0 means unlimited.",
  "max_players": 0,

  "_comment_visibility": ["public: Game will be published on the official Factorio matching server",
                          "lan: Game will be broadcast on LAN",
                          "hidden: Game will not be published anywhere"],
  "visibility": "hidden",

  "_comment_credentials": "Your factorio.com login credentials. Required for games with visibility public",
  "username": "",
  "password": "",

  "_comment_token": "Authentication token. May be used instead of 'password' above.",
  "token": "",

  "game_password": "",

  "_comment_verify_user_identity": "When set to true, the server will only allow clients that have a valid Factorio.com account",
  "verify_user_identity": true,

  "_comment_max_upload_in_kilobytes_per_second" : "optional, default value is 0. 0 means unlimited.",
  "max_upload_in_kilobytes_per_second": 0,

  "_comment_ignore_player_limit_for_returning_players": "Players that played on this map already can join even when the max player limit was reached.",
  "ignore_player_limit_for_returning_players": true,

  "only_admins_can_pause_the_game": true,

  "_comment_admins": "List of case sensitive usernames, that will be promoted immediately",
  "admins": []
}