American Truck Simulator Server Ports

All required ports for running an ATS dedicated server — game port, query port, and Steam relay.

Required Ports

Port	Default	Protocol	Purpose
Game	27015	TCP + UDP	Player connections
Query	27016	TCP + UDP	Session browser listing

Both TCP and UDP must be forwarded for both ports.

Port	Default	Range	Purpose
`connection_virtual_port`	100	100–200	Steam relay connections
`query_virtual_port`	101	100–200	Steam relay queries

Virtual ports are handled by Steam and do not need port forwarding.

For the server to appear in the LAN browser, query_dedicated_port must be in range 27015–27020.

Each instance needs unique port pairs (e.g., 27015/27016 for server 1, 27017/27018 for server 2).

📝 Note: On XGamingServer, ports are configured automatically.

How is this guide?

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