ATS server_config.sii Explained: Every Setting and Default

server_config.sii is the main settings file of an American Truck Simulator dedicated server. On FREAKHOSTING it is in Files under .local > share > American Truck Simulator. It holds the session name, password, player limit (8 at most), gameplay rules and moderators. Stop the server, edit, save and start. The panel rewrites the session name, ports and logon token from Startup on every start; your other edits stay.

Fact	Value
Folder in Files	`/home/container/.local/share/American Truck Simulator`
Other files there	`server_packages.sii`, `server_packages.dat`, `config_ds.cfg`, `live_streams.sii`, `server.log.txt`
Set on Startup instead	`lobby_name`, `connection_dedicated_port`, `query_dedicated_port`, `server_logon_token`
Apply changes	Restart the server

File Manager showing the American Truck Simulator config folder with server_config.sii and server_packages files — The American Truck Simulator config folder in the File Manager

How to edit server_config.sii

Stop the server

Stop the server so it doesn’t save over your changes.

Open the file

Open Files, then .local > share > American Truck Simulator, and click server_config.sii.

Change the values

Change only the value after the colon. Keep the quotes around text values, and write true or false for on/off settings.

Save and start

Save the file and start the server. Check the summary lines in the console, for example [MP] Password required: Yes.

Session settings

Key	Default on our server	What it does
`lobby_name`	`"American Truck Simulator"`	Session name, up to 63 characters. Set it with Lobby name on Startup.
`description`	`""`	Session description, up to 63 characters.
`welcome_message`	`""`	Message shown to players who join, up to 127 characters.
`password`	`""` (no password)	Session password, up to 63 characters.
`max_players`	`8`	Maximum players. The limit is 8.
`max_vehicles_total`	`100`	Vehicle limit for the session. Keep the default unless you have a reason to change it.
`max_ai_vehicles_player`	`50`	AI vehicle limit per player. Keep the default unless you have a reason to change it.
`max_ai_vehicles_player_spawn`	`50`	AI vehicle spawn limit per player. Keep the default unless you have a reason to change it.

Gameplay settings

Key	Default	What it does
`player_damage`	`true`	Players can damage each other.
`traffic`	`true`	AI traffic is on.
`hide_in_company`	`false`	Hides other players in company areas.
`hide_colliding`	`true`	Hides a colliding vehicle after a teleport.
`force_speed_limiter`	`false`	Forces the speed limiter on for everyone.
`mods_optioning`	`false`	Lets mods marked optional really be optional.
`timezones`	`0`	Accepts values 0 to 2.
`service_no_collision`	`false`	Turns off collisions in service areas.
`in_menu_ghosting`	`false`	Turns off collisions while a player is paused.
`name_tags`	`true`	Shows player names above vehicles.
`friends_only`, `show_server`	`false`, `true`	Not used by the dedicated server.

Network and moderators

Key	Default	What it does
`connection_virtual_port`	`100`	Virtual port, 100 to 200.
`query_virtual_port`	`101`	Virtual port, 100 to 200.
`connection_dedicated_port`	`27015`	Game port. Set by the panel.
`query_dedicated_port`	`27016`	Query port. Set by the panel (Query port, read only).
`server_logon_token`	`""`	Steam logon token. Set it with Steam Auth token on Startup.
`moderator_list`	`0`	Number of moderators, followed by one `moderator_list[n]` line per Steam ID.

Example with a password, 6 players and one moderator:

 password: "convoy2026"
 max_players: 6
 moderator_list: 1
 moderator_list[0]: 76561198000000001

Frequently asked questions

Why did my lobby name change back?

The panel writes Lobby name from Startup into lobby_name on every start. Change it on Startup. The same applies to the ports and server_logon_token.

Do my other edits stay after a restart?

Yes. We tested it: password, description, welcome_message, moderator_list and the gameplay settings stay. The game re-saves the file on start but keeps your values.

Where is server_config.sii if I can’t see the .local folder?

Open Files at the top level of your server; .local is a folder there. You can also connect with SFTP.

Can I set more than 8 players?

No. SCS limits max_players to 8.

ATS server guide

Every ATS page in one place.

Set a password

The password key, step by step.

Change max players

max_players, up to 8.

Moderators and commands

moderator_list and chat commands.

File Manager

Edit files in the panel.

Tested by the FREAKHOSTING team on our Game Panel on 30 October 2026 (American Truck Simulator dedicated server 1.61s) and checked against the official SCS dedicated server documentation. Steps may differ slightly if the game changes.

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Last Updated: October 2026

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ATS server_config.sii Explained: Every Setting and Default

How to edit server_config.sii

Session settings

Gameplay settings

Network and moderators

Frequently asked questions

Why did my lobby name change back?

Do my other edits stay after a restart?

Where is server_config.sii if I can’t see the .local folder?

Can I set more than 8 players?

ATS server guide

Set a password

Change max players

Moderators and commands

File Manager

Need Extra Help?

Save on Your Hosting

​How to edit server_config.sii

​Session settings

​Gameplay settings

​Network and moderators

​Frequently asked questions

​Why did my lobby name change back?

​Do my other edits stay after a restart?

​Where is server_config.sii if I can’t see the .local folder?

​Can I set more than 8 players?

​Related guides

ATS server guide

Set a password

Change max players

Moderators and commands

File Manager

​Need Extra Help?

​Save on Your Hosting

How to edit server_config.sii

Session settings

Gameplay settings

Network and moderators

Frequently asked questions

Why did my lobby name change back?

Do my other edits stay after a restart?

Where is server_config.sii if I can’t see the .local folder?

Can I set more than 8 players?

Related guides

Need Extra Help?

Save on Your Hosting