StarRupture Required Ports & Firewall (Connection Fix)

If players can’t join, 90% of the time it’s either:

the server isn’t actually running a save/session, or
ports are blocked/mismatched (mainly on self-hosted installs)

If you’re hosted on LOW.MS, you usually don’t need to port forward — your server already has a public IP and open game ports. This guide is still useful for troubleshooting and for advanced custom port setups.

Default ports (most common)

StarRupture dedicated servers commonly use:

Game Port: 7777 (UDP)
Query Port: 27015 (UDP)

If you changed ports, use the values shown in your LOW.MS Control Panel (or your custom launch parameters).

LOW.MS checklist (hosted)

Confirm the server is Running in the LOW.MS Control Panel
Restart the server, then wait 60–90 seconds
Ensure the save is running (admin should do Manage Server → Load/New → Start Game)
Players should join via Join Game → Dedicated Server

Self-hosting checklist (firewall/router)

If you are self-hosting, you must allow inbound UDP for the configured ports.

Windows Firewall

Allow the server executable (e.g. StarRuptureServerEOS.exe) through the firewall
Or create inbound rules for:
- UDP 7777
- UDP 27015

Router / Port Forwarding

Forward UDP 7777 to your server machine’s LAN IP
Forward UDP 27015 to your server machine’s LAN IP
Make sure your server machine has a static LAN IP (or a DHCP reservation)

Advanced: changing ports

If you need to avoid a conflict (another service using the same ports), you can change ports via server launch parameters (example):

-Port=7787
-QueryPort=27025

After changing ports:

Update any firewall rules/port forwards
Tell players the new join address (usually IP:NewPort)

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