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Factorio: Server not responding [Full Fix]

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How can I fix the Factorio server not responding error?

1. Allow Factorio through Firewall 

  1. Press the Windows key + R to open Run.
  2. Type control and click OK to open the Control Panel.
  3. Click on System Security.
  4. Next, click on Windows Defender Firewall.
    Factorio server not responding
  5. From the left pane, click on Allow an app or feature through Windows Defender Firewall.
  6. Click the Change Settings button. Click Yes if prompted by UAC.
  7. Scroll through the apps and locate Factorio.
  8. Make sure both the Private and Public boxes are checked.
  9. Click OK to save the changes and exit the Control Panel.

Relaunch Factorio and check if the Factorio still can’t connect to server. If you have a third-party antivirus with a firewall, make sure the app is not blocking games either.

Play via Steam 

factorio server not responding

If you or your friend is having difficulty joining the Factorio server, ask them to join via Steam. Several users have reported that when playing via Steam, they don’t get the error or server issues. 


2. Check if you have configured port forwarding 

  1. Go to your local connection setting and note down the local IPv4 address. It should look something like this:
    192.168.1.1
  2. Next, open your internet browser and type your local IPv4 DNS address.
  3. Enter your username and password. The username is admin, and the password is admin/password by default for most routers. You can also check your router’s manual to see its login credentials.
  4. In your router configuration page, open Port forwarding.
  5. Type 34197 in the Service Port field. 
    Factorio server not responding
  6. Enter 34197 again in the Internal Port field as well.
  7. Paste your local IPv4 address in the IP address field.
  8. Click Apply/OK to save the changes.
  9. Open Google and search My IP to get your IP address.
  10. Send both your IP address and port forward code 34197 to your friend. 

Try connecting to the game server and check if the Factorio can’t establish connection error is resolved.


3. Disable Windows Defender Firewall 

  1. Click on Start and choose Settings.
  2. Go to Update and Security.
  3. Click on Windows Security.
    Factorio server not responding
  4. Next, choose Windows Firewall.
  5. Choose your currently active profile.
  6. Scroll down and toggle the switch to disable the firewall.

If you have a third-party antivirus with a firewall installed, disable it as well. Disabling the firewall seems to have resolved the Factorio not responding LAN and lag related issues.

Make sure to disable the security program temporarily and try connecting to the server to see if the error is fixed.


4. Run the network troubleshooter 

  1. Press the Windows key + I to open Settings.
  2. Go to Update & Security.
  3. Open the Troubleshoot tab from the left pane and select Additional troubleshooters.
  4. Scroll down and click on Internet Connections.
  5. Click the Run the Troubleshooter button.
  6. Follow on-screen instructions. You may need to choose your internet adapter to proceed.
  7. Once it is completed, in the Troubleshoot window, scroll down and click on Network Adapter.
  8. Click the Run the Troubleshooter button and follow on-screen instructions.

If the error persists, check your WiFi hardware. If you are using external WiFi hardware, check the WiFi receiver for issues. Unplug the card and reboot your computer.

After the reboot, plug the card back and make sure it is detected. Connect your WiFi network and check if the Factorio couldn’t establish network communication with server error is resolved.


The Factorio server not responding error can occur due to several reasons, and we hope that our guide helped you fix this issue.

Did we miss a certain solution? Let us know in the comments below.

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This post was written by Tashreef Shareef and was first posted to WindowsReport



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