Ports & Firewall Configuration
If players can't join, it's usually the firewall.
Required Ports
| Port | Protocol | Function |
|---|---|---|
| 7777 | UDP & TCP | Game Traffic |
| 27015 | UDP & TCP | Steam Query |
Linux (UFW)
sudo ufw allow 7777/udp
sudo ufw allow 7777/tcp
sudo ufw allow 27015/udp
sudo ufw allow 27015/tcp
Windows Firewall
1. Open "Windows Defender Firewall with Advanced Security".
2. Create a new Inbound Rule.
3. Select Port -> UDP.
4. Enter 7777, 27015.
5. Allow the connection.
6. Repeat for TCP.