Check if your Space Engineers server is online
Space Engineers answers a Steam-based query on a port of its own, apart from the one players join through.
The ports Space Engineers uses
Both are UDP. Out of the box the query port and the game port have different numbers, and it is the query one that this page and the server browser use — which is why forwarding just one of them leaves a live server that nobody can see.
Every port a default Space Engineers install uses
With the game port left at 27016. If you changed it with ServerPort in SpaceEngineers-Dedicated.cfg, the other ports move with it.
| Port | What it is for |
|---|---|
| 27016 UDP | Game trafficRequired Gameplay and server-list registration. |
| 8080 TCP | Remote APIDo not forward The VRage remote API. Useful, but it is an administrative endpoint — reach it over a VPN. |
Still offline? Try this
Still failing with both ports open? Loading may not be done. At boot, Space Engineers recalculates physics for every grid in the save, and a world with many large ships can be busy with that for quite a while before replying.
What a Space Engineers server needs to run well
- Memory, 8 players
- 8 GB
- CPU cores
- 6+
- Disk
- 20 GB+
Per-block physics on every grid; abandoned ships keep costing CPU until they are cleaned up.