Check if your Icarus server is online
Icarus answers the standard Steam query on its query port, so that is the number to test, not the game port.
The ports Icarus uses
The checker starts at 27015, the default query port. If the server was launched with a different -QueryPort=, use that. The game port, 17777, does not answer queries.
Every port a default Icarus install uses
With the game port left at 17777. If you changed it with -PORT= launch argument, the other ports move with it.
| Port | What it is for |
|---|---|
| 17777 UDP | Game trafficRequired Players connect here over UDP. |
| 27015 UDP | Steam queryRequired Set with -QueryPort=. Needed for the server browser. |
Still offline? Try this
An Icarus server with no prospect loaded, or one that shut itself down because nobody joined (ShutdownIfNotJoinedFor), will not answer at all. Check that it is running and has a prospect before looking at the router.
What a Icarus server needs to run well
- Memory, 4 players
- 8 GB
- CPU cores
- 4+
- Disk
- 20 GB+
Unreal Engine 4. Large bases and wide exploration raise the load more than the eight-player cap suggests.