Question 1

Do I need to forward ports for a Core Keeper server?

Accepted Answer

No. The server connects outbound to Steam's relay network and players join with a Game ID instead of an IP and port, so no firewall rules or NAT port forwarding are required — it even works behind CGNAT.

Question 2

How do players join my server?

Accepted Answer

With a Game ID. Retrieve it from the container logs using docker logs core-keeper | grep -i Game. Copy the long numeric code and share it with your players, who paste it into the game's Join Game screen.

Question 3

Where do I find the Game ID?

Accepted Answer

The server prints it to its logs on startup. Run docker logs core-keeper | grep -i Game. If nothing appears, the server is likely still downloading its files via SteamCMD — wait and check again.

Question 4

Does the Core Keeper server have a web interface?

Accepted Answer

No. There is no web admin panel. The server is configured through environment variables such as WORLD_NAME, and you manage it with docker commands and logs. Players connect entirely from the game client using the Game ID.

Question 5

Where is the world save stored?

Accepted Answer

In the ./data volume, mounted to /home/steam/core-keeper-data in the container. Back up this directory regularly — it is the only copy of your world.

🎮 Setup a Core Keeper Dedicated Server

📦 Resources & Setup Scripts

Quick Install:

Tutorial Steps

1 Download the Script

2 Make it Executable

3 Run the Installer

4 Get the Game ID and Join

Ports Used

Overview

Why Use It

When You Need It

Who Should Use It

Real Use Cases

Main Features

How to Use After Installation

Security Best Practices

Ports and Firewall Notes

Backup and Maintenance

Common Mistakes

Troubleshooting

Alternatives

When Not to Use It

PrismaTechWork Professional Help

Frequently Asked Questions