Satisfactory Port 8888 Fix for Dedicated Server
Since the launch of Satisfactory 1.1, the dedicated server networking stack has been overhauled to use a more reliable messaging system. The most significant change is the introduction of Port 8888 (TCP). If you have only forwarded Port 7777, your players will likely see "Checking Server State" indefinitely or receive "Encryption Token Missing" errors.
๐ The New Port Meta
Port 7777 (UDP/TCP) remains the primary game port, but Port 8888 (TCP) is now mandatory for login verification and world metadata syncing.
๐ก๏ธ Firewall Requirements
Ensure your server host or home router has an inbound rule allowing TCP traffic on 8888. Most "Encryption" errors are actually blocked TCP handshakes.
How to Configure Port 8888
1. Router Port Forwarding
Log into your router and add a new forwarding rule:
- Port Range: 8888
- Protocol: TCP (UDP is NOT needed for this port)
- Internal IP: Your server's local IP address
2. Linux (ufw) Firewall Setup
If you are running your Satisfactory dedicated server on Linux, run these commands:
sudo ufw allow 7777/udp
sudo ufw allow 7777/tcp
sudo ufw allow 8888/tcp
sudo ufw reload3. Windows Firewall Setup
- Open "Windows Defender Firewall with Advanced Security".
- Click "Inbound Rules" -> "New Rule".
- Select "Port", then "TCP", and enter "8888".
- Set to "Allow the connection".
Common Mistake: Setting 8888 to UDP will not help. The reliable messaging system requires the stateful nature of TCP to synchronize large save metadata before the player spawns.
Testing the Connection
You can verify if your port is open by using a tool like canyouseeme.org while the server is running. If you still cannot connect, ensure your ServerSettings.ini does not have a hardcoded multihome IP that differs from your outward-facing IP.
Skip the networking headache. Rent a Satisfactory Server with Port 8888 pre-configured and optimized routing.