FIX: Can’t play Forza Horizon 4 online on PC

Vlad Constantinescu
by Vlad Constantinescu
VPN Expert & Privacy Advocate
Affiliate Disclosure

  • Forza Horizon 4 is an awesome racing game that you can play on your Windows 10 PC or Xbox, alone or with your friends.
  • Some users complained that they can't play Forza Horizon 4 online. If you're also in this situation, read our guide below.
  • Visit our Gaming Hub for the latest game news, guides, and reviews.
  • Check out our Networking section to learn more about troubleshooting common issues.
FIX Forza Horizon 4 multiplayer
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Forza Horizon 4 is a thrilling racing game for Windows 10 and Xbox One.

However, that doesn’t mean that it can overtake (pun intended) technical issues.

Much like other games, Forza Horizon 4 has its fair share of problems.

For instance, some users complained that they’re not able to play Forza Horizon 4 multiplayer races on Windows.

I’ve been playing for four to five days now, but I’ve not once been able to connect to online. When I try to connect to ‘Horizon Life’ it just displays the loading text on the top of the screen.

YTub CadGamings on ForzaMotorSport Forum

Forza Horizon 4 is an Xbox Live multiplayer game and requires Teredo IPsec connectivity if you want to take it online.

Therefore, players may be unable to play the game if there’s something up with the Teredo adapter.

With that in mind, it’s safe to assume that fixing Teredo connectivity could fix Forza Horizon 4’s multiplayer mode.

Check out our suggested fixes for this issue.

How to Fix Forza Horizon 4’s Multiplayer Mode

Reinstall the Teredo Adapter

  1. Press the Win + X key combination on your keyboard
  2. Select Command Prompt (Admin)
  3. Type netsh interface Teredo set state disable
  4. Press Enter
  5. Use the Win + X key combo on your keyboard once more
  6. Select Device Manager
  7. Click View and select Show hidden devices
  8. Expand the Network adapters category
  9. Right-click any Teredo adapter and select Uninstall
  10. Restart your PC after uninstalling the adapter
  11. Open an elevated Command Prompt again
  12. Type netsh interface Teredo set state type=default
  13. Press Enter to re-enable the adapter

Check your firewall

TinyWall firewall

Windows Defender Firewall can sometimes interfere with multiplayer games.

As a result, many players turn off the firewall so that it doesn’t affect or limit their gaming experience.

However, the Toredo IPsec connection requires that Windows Defender Firewall is enabled for it to work.

Some Forizon Horizon 4 players have even confirmed that turning the WDF on fixed the game’s multiplayer mode.

Therefore, you need to check that your Windows Defender Firewall is enabled. Here’s how to do it:

  1. Press the Win key
  2. Type Windows Firewall
  3. Select Windows Defender Firewall
  4. Click the Turn Windows Defender Firewall on or off button
  5. Make sure that Turn on Windows Defender Firewall options are enabled
  6. Click the OK button
  7. Restart your Windows PC
  8. Check if you can play Forza Horizon 4 online

Speaking of Windows’ Firewall, there’s one more thing that you could do to ensure maximum efficiency.

Resetting your Windows Defender Firewall policy to default also seems to work, so here’s how you can do it:

  1. Launch the Command Prompt with admin rights
  2. Type the following command:
    • netsh advfirewall set currentprofile firewallpolicy blockinbound,allowoutbound
  3. Press the Enter key
  4. Restart your PC

Disable third-party antivirus software

Temporarily turn off firewalls and any antivirus or malware prevention software

Third-party antivirus software can also affect Teredo IPsec’s connectivity, but it’s not a rule.

To make sure that this isn’t the case, temporarily disable any third-party antivirus utilities.

You can usually do that by right-clicking your antivirus client’s system tray icon and selecting the appropriate option (e.g. turn off, disable).

Alternatively, you could perform a clean boot of Windows to ensure that no antivirus package is running by following these steps:

  1. Press Win + R on your keyboard
  2. Type msconfig and hit Enter
  3. Choose the Selective startup option in the General tab
  4. Deselect the Load startup items check box
  5. Select the Use original boot configuration and Load system services options
  6. Go to the Services tab
  7. Enable the Hide all Microsoft services setting
  8. Choose the Disable all option to disable third-party services
  9. Press the Apply button
  10. Click OK
  11. Restart your Windows PC

Disable/uninstall your VPN

Connected VPNs may also play a big part in disabling Forza Horizon 4 multiplayer connections.

Thus, you need to make sure you disconnect VPN clients, at least enough to rule out their interference.

If you notice no improvement after disabling your VPN, you might need to completely uninstall it, along with its network adapter.

This is necessary to make sure your VPN and its network adapters aren’t blocking Tereda.

This is how you can remove a VPN’s network adapter in Windows 10.

  1. Right-click Windows 10’s Start Menu
  2. Select Device Manager
  3. Choose the Show hidden devices option
  4. Double-click the Network adapters category
  5. Right-click the VPN’s TAP adapter
  6. Select Uninstall
  7. Restart your Windows 10 PC after uninstalling the adapter

Enable the IP Helper Service

IP Helper is one of the services required for Xbox Live. Forza Horizon 4 multiplayer won’t work if the service isn’t enabled.

You can easily check if the IP Helper service is enabled by following these steps:

  1. Hit the Win key on your keyboard
  2. Type services
  3. Select the Services app
  4. Double-click the IP Helper service
  5. Select Automatic from the Startup type drop-down menu
  6. Click the Start button
  7. Press the Apply button to apply the new settings
  8. Click OK to close the window

Note that IP Helper also has a few dependency services that need to be enabled.

  1. Right-click IP Helper
  2. Select Properties
  3. Go to the Dependencies tab
  4. Check if those services are also enabled

Enable Xbox Live Networking/ Xbox Live Auth Manager Services

Xbox Live Networking and Xbox Live Auth Manager are two other services that need to be enabled for Xbox Live.

You can enable those services pretty much the same way as you did with IP Helper (method 5).

However, instead of Automatic, you’ll need to select Manual startup for both of these services.

Conclusion

All things considered, there are a few ways you can fix Forza Horizon 4 for multiplayer gaming.

We advise you to try our suggested fixes one by one, and don’t skip either of our methods.

The ones you skip could be the very ones that kickstart your game’s online capabilities.

Remember that it’s the game’s Xbox Live server connectivity that usually needs fixing, which you can check by clicking Settings > Network within the Xbox app.

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If you are using an Apple AirPort router, you may need to enable Teredo tunnels in the router configuration. From MacOS: Open the AirPort Utility app, click the Network tab, click the Network Options… button, check “Allow Teredo tunnels”.