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How to Connect

Use this guide when you want to connect to your own Core Keeper server. If the server is already online and reachable, go straight to the join steps. If it is not reachable yet, HaruHost Tunnel is the sure-fire way to make it accessible first.

Location

Section titled “Location”
  • Game Servers -> Your Game Server Name -> How to connect

Part 1: Make sure the server is reachable

Section titled “Part 1: Make sure the server is reachable”

If players cannot join yet, solve reachability first.

The easiest path is Tunnel. HaruHost prepares the connection for you so the server can be reachable over the internet without you having to manually set up port forwarding and firewall rules first.

Step 1: Open your server and start the connection guide

Section titled “Step 1: Open your server and start the connection guide”

Open your Core Keeper server page and use How to connect.

Core Keeper server page in HaruHost with the How to connect entry visible

Step 2: Start the server if HaruHost says it is offline

Section titled “Step 2: Start the server if HaruHost says it is offline”

If the server is offline, HaruHost shows the start prompt inside the connection guide.

Core Keeper Direct Join Guide showing the Server Offline start prompt

Step 3: Wait for the server to finish starting

Section titled “Step 3: Wait for the server to finish starting”

After you press Start, HaruHost keeps the guide open while the server is still booting.

Core Keeper Direct Join Guide showing the Server Starting state

Step 4: Let HaruHost prepare the connection details

Section titled “Step 4: Let HaruHost prepare the connection details”

Once the server is running and the guide is ready, HaruHost shows the exact values to use:

  • Direct Join IP: the exact IP and port to paste into Core Keeper
  • Server Password: the password to enter before joining if the server uses one

If the direct join address is not working, treat it as a reachability problem. First check that the server shows Online in HaruHost. If the server was started without Tunnel, enable Tunnel and restart the server.

Part 2: Join the server

Section titled “Part 2: Join the server”

Core Keeper uses a direct IP join flow.

Step 1: Open Join Game

Section titled “Step 1: Open Join Game”

Launch Core Keeper and select Join Game from the main menu.

Core Keeper main menu with Join Game highlighted

Step 2: Switch to Join With IP

Section titled “Step 2: Switch to Join With IP”

In the join method dropdown, select Join With IP instead of Join With Game ID.

Core Keeper join menu with the Join With IP option selected

Step 3: Enter the Direct Join IP and password

Section titled “Step 3: Enter the Direct Join IP and password”

Copy the Direct Join IP from HaruHost and paste it into the IP field. Then enter the Server Password from HaruHost before pressing Join.

Core Keeper direct join screen with IP, port, password, and Join button

Step 4: Pick your character

Section titled “Step 4: Pick your character”

Choose the character you want to use for this server.

Core Keeper character selection screen after joining a server

Step 5: Wait for the world to load

Section titled “Step 5: Wait for the world to load”

After loading finishes, you should spawn into the server world.

Core Keeper gameplay after successfully joining the server

Troubleshooting

Section titled “Troubleshooting”

The server is not reachable from the internet

Section titled “The server is not reachable from the internet”

Use Tunnel as the first fix. That is the main HaruHost advantage here, because it gives you a reliable path without making you manually configure router port forwarding and firewall rules first.

Join With IP fails or does not connect

Section titled “Join With IP fails or does not connect”

Treat that as a reachability problem.

  • Check that the server status shows Online in HaruHost.
  • If you enabled the tunnel while the server was already running you will need to restart the server for the tunnel to be properly set up.
  • If you use manual setup for firewall and port forwarding, re-check that the rules are correct, stop the server, and run HaruHost port checker to validate that the ports are reachable over the internet.

The password is rejected

Section titled “The password is rejected”
  • Copy the exact Server Password from HaruHost.
  • Check whether the server password was changed recently and restart the server if required.
  • If HaruHost shows no password, confirm the server is not configured with a password outside HaruHost.

Summary

Section titled “Summary”

The flow is simple:

  1. Make sure the server is reachable.
  2. If reachability is the problem, use HaruHost Tunnel first.
  3. Then join in Core Keeper with the exact Direct Join IP and Server Password HaruHost gives you.
Section titled “Related links”