Rainbow Six: Siege connection errors [FIX GUIDE]

by Madalina Dinita
Madalina Dinita
Madalina Dinita
Madalina has been a Windows fan ever since she got her hands on her first Windows XP computer. She is interested in all things technology, especially emerging technologies... read more
Affiliate Disclosure
  • Tom Clancy's Rainbow Six is one of the most iconic tactical shooters ever created. I
  • Players have been reporting connectivity errors with either Rainbow Six or Uplay. 
  • Want to learn more about fixing games on your PC? Visit our dedicated Troubleshooting section.
  • Avid Rainbow Six might also be interested in the articles that we have on our Gaming section as well.
fix rainbow six siege connection

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Many Rainbow Six: Siege players report issues with online functions during the game. More specifically, players may experience slow server connections, failed connection attempts or even connection errors.

In this article, we’re going to show how to fix general connection bugs in Tom Clancy’s Rainbow Six: Siege.

How can I fix Rainbow Six: Siege connection errors?

1. Check your firewall/antivirus

One common cause for connection issues in Rainbow Six: Siege can be your antivirus software. Sometimes your antivirus or firewall can block the game from accessing the Internet and cause the network issues to appear.

To fix the problem, you need to be sure that the game is allowed to access the Internet, so add the game to the list of exclusions in your antivirus and firewall.

If that doesn’t work, you might want to try disabling certain antivirus features or completely disable your antivirus.

Some users reported that disabling their antivirus doesn’t solve the problem, and if that’s the case, you might have to uninstall your antivirus.

Once you uninstall the antivirus, check if the issue is still there. If removing the antivirus solves the issue, your next step would be to consider a new antivirus solution.

There are many antivirus software in 2021 that come with integrated game modes. These are specifically created to optimize your gaming while keeping you protected.

Once your antivirus is in game mode, you will not get intrusive notifications, and some non essential functionalities will be paused in order to let you use more resources on the game.

Of course, real-time protection is always on, and all threats are being taken care of as soon as they are detected.

2. Consider using a VPN

Several users reported that they fixed the problem with Rainbow Six: Siege simply by using a VPN like Speedify. According to them, using a VPN solved their connection problems, so you might want to try that as well.

As far as gameplay is concerned, you won’t have to worry about lag spikes, lag, or general disconnections anymore since SPeedify regulates your Internet connection to provide a steadier flow.

Speedify uses a variety of techniques to fix lost and corrupted packets, so match issues with Rainbow Six: Siege will now be a thing of the past.

In fact, all common drawbacks of using VPNs, such as reduced bandwidth, are also something you will not experience while using Speedify.

Get Speedify

3. Forward your ports

You will need to forward these ports to your computer’s IP address for the best possible connection:

  • Uplay PC:


    • TCP: 80, 443, 14000, 14008.
  • Game Ports:


    • UDP: 6015

For more information on how to configure your network ports, visit the official websites of your software and hardware manufacturers. There are also dedicated programs that you can use to forward your ports.

4. Check background applications

In some cases, background applications can cause connectivity issues to occur in Rainbow Six: Siege. However, you can fix this problem simply by disabling startup applications. To do that, just follow these simple steps:

  1. Press Windows Key + R and enter msconfig.
  2. Now press Enter or click OK.
  3. Go to Services tab and check Hide all Microsoft services.
  4. Now click Disable all button.
    Rainbow Six Siege trouble connecting
  5. Next, navigate to Startup tab and click Open Task Manager.
    Rainbow Six Siege connection failed
  6. Right-click the first item on the list and choose Disable.
  7. Repeat this step for all items on the list.
    Rainbow Six Siege yellow connection
  8. Close Task Manager, and go back to System Configuration window.
  9. Click Apply and OK to save changes. Restart your PC.
    Rainbow Six Siege error code 3-0x0001000b PC

Once your PC restarts, check if the issue is still there. If the issue is resolved, you can start enabling services and startup applications one by one until you find the problematic app or service.

If you want to know how to add or remove startup apps on Windows 10, check out this simple guide.

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5. Reset your hosts file

Sometimes your hosts file can get changed, and that can cause Rainbow Six: Siege connection issues to occur. To fix this problem, you just need to reset your host files to the default.

Several users reported Access denied message while editing hosts file, but we already explained how to fix this problem in one of our previous articles.

Once you reset your hosts file, the issue should be resolved and you’ll be able to run the game without any problems.

Don’t know how to reset the hosts file? Take a look at this simple guide and learn how to do it!

5. Make sure there are no locked ports

Your Internet Service Provider may have applied network restrictions that could be blocking your Rainbow Six: Siege connection. You can contact your ISP for more information.

6. Change your server

Many users reported high ping while playing Rainbow Six: Siege. This can be caused because you’re connecting to an automatically picked server.

The server is usually picked based on your ping, and sometimes it might connect you to a server that is far away causing unnecessary lag.

This can be a big problem, but you can fix this issue simply by making changes to a single file. To do that, follow these steps:

  1. Make sure that Rainbow Six: Siege is completely closed.
  2. Go to DocumentsMy GamesRainbow Six – Siege directory.
  3. Inside you should see a single directory with a long file name. Access that directory.
  4. Inside it you should see GameSettings file. Open this file with Notepad.
  5. When the file opens, scroll all the way down to the [ONLINE] section.
    • There you should see a list of servers along with their abbreviations.
    • Select the server you want, for example wus would be US West, and change the DataCenterHint value accordingly.
    • In our example, we would just have to make the following change DataCenterHint=wus and save the file.

After changing the server, start the game again and check if the issue is resolved. For best performance, be sure to select the server that is closest to you.

It’s worth mentioning that you might have to repeat this solution several times in order to successfully change your server.

If you experience high latency/ping in game on Windows 10, take a look at this quick guide that will help you solve them with ease.

7. Verify the integrity of game files

To do that, just follow these steps:

  1. Start Steam and go to your library.
  2. Right-click Rainbow Six: Siege and choose Properties from the menu.
    Rainbow Six Siege error code 3-0x0001000b PC
  3. Go to Local files tab and click Verify integrity of game files button.
    Rainbow Six Siege disconnected from server
  4. The verification process will now start. This can take a while, so be patient and don’t interrupt it.

If you’re having connection issues in Rainbow Six: Siege, the issue might be file corruption. Sometimes the game files can get corrupted and that can lead to this and many other problems.

However, you can easily check if your game files are damaged and repair them right from Steam. Once the process is finished, start the game again and check if the problem is still there.

Need more VPN alternatives? Check out this list with our best picks available right now!

8. Disable Windows firewall

  1. Press Windows Key + S and enter firewall.
  2. Choose Windows Defender Firewall from the list.
    Rainbow Six Siege connection problems PC
  3. Select Turn Windows Defender Firewall on or off from the menu on the left.
    Rainbow Six Siege connection failure
  4. Now select Turn off Windows Defender Firewall (not recommended) for both Public and Private network settings.
  5. Click OK to save changes.
    Rainbow Six Siege yellow connection

If you’re experiencing Rainbow Six: Siege connectivity issues, it’s possible that Windows Firewall is preventing the game from working properly.

After turning off your antivirus, check if the problem is resolved. If disabling the firewall helps, check your firewall configuration and make sure that the game is allowed to access the Internet.

Rainbow Six: Siege is a great game, but many users reported various connectivity issues. Speaking of issues, here are some common problems reported by users:

  • Rainbow Six Siege error code 3-0x0001000b PC – This is a common error that can appear in the game. If you encounter it, be sure to check your antivirus and firewall and make sure that the game is added to the list of exclusions.
  • Rainbow Six Siege disconnected from server – Sometimes you might get disconnected due to problems with the server. However, you can always change your server manually to fix this problem.
  • Rainbow Six Siege trouble connecting, connection problems PC – Sometimes third-party applications can cause this issue to appear. To fix the problem, disable all startup applications and services and check if that helps.
  • Rainbow Six Siege connection failed, failure, to server lost, poor, drops – These issues can occur due to problems with your ports, and in order to fix the issue, you need to forward the necessary ports.
  • Rainbow Six Siege yellow connection – Sometimes you might get yellow connection icon due to your hosts file. To fix the problem, simply reset your hosts file to default and the issue should be resolved.

These are some Rainbow Six: Siege issues that can occur, but we hope that you managed to fix connectivity issues by using one of our solutions.

If you have any other suggestions or questions, don’t hesitate to leave them in the comments section below.

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Frequently Asked Questions

  • If you are experiencing lagging issues with Rainbow Six: Siege, try the solutions provided here. Also, temporarily disable any VPN, make sure your game is up to date, update your graphics driver and Windows 10 or lower your graphics settings to achieve better fps.

  • Add Uplay to the firewall exceptions list, flush your DNS or close background programs. For a full guide on how to fix Uplay connectivity errors, have a look at our guide.

  • Rainbow Six: Siege is an online game, meant to be played in PvP mode. There is a limited PvE mode, but you will still need to have an internet connection in order to launch the game.