• Tom Clancy's Rainbow Six is one of the most iconic tactical shooters ever created. It steps in the footprints of other genre-defining titles, such as Ghost Recon and Splinter Cell.
  • Players have been reporting connectivity errors with either Rainbow Six or Uplay. We have previously looked at fixing the Uplay connection errors and today we are having a look at the game itself.
  • For more Rainbow Six: Siege content, head over to our dedicated page where we take a look at the most common problems players have encountered.
  • Need some extra help? Our troubleshooting area is the place to look for fixes and guides.

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 on Windows 10?

1. Check your firewall/antivirus

Rainbow Six Siege error code 3-0x0001000b PC

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.

Did you know that your antivirus can block the internet connection? Check out this guide to find out more.

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.

If you’re a Norton user, we’ve got a dedicated guide on how to completely remove it from your PC. There’s a similar guide for McAffe users, as well.

If you use another antivirus solution, you can completely remove it by using one of these amazing tools.

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.

Users reported problems with Kaspersky, ZoneAlarm, and Malwarebytes, so if you’re using one of these tools, you should consider removing them.

Antivirus software, such as Bitdefender, have a Gaming Mode feature, so it won’t interfere with your gaming sessions in any way. If you’re looking for a reliable antivirus, Bitdefender would be our top pick.

Looking to replace your current antivirus solution with a better one? Here’s a list with our best picks.

2. Forward your ports

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

Uplay PC:
: 80, 443, 14000, 14008.

Game Ports:
: 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.

3. 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. Now press Enter or click OK.
  2. Go to Services tab and check Hide all Microsoft services. Now click Disable all button.
    Rainbow Six Siege trouble connecting
  3. Next, navigate to Startup tab and click Open Task Manager.
    Rainbow Six Siege connection failed
  4. Right-click the first item on the list and choose Disable. Repeat this step for all items on the list.
    Rainbow Six Siege yellow connection
  5. Close Task Manager, and go back to System Configuration window. 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.

Can’t open Task Manager? Don’t worry, we’ve got the right solution for you.

4. 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.

You don’t know how to reset the hosts file? Take a look at this simple guide and learn how to do it like a pro.

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

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. 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.

Once the process is finished, start the game again and check if the problem is still there.

8. Consider using a VPN

Rainbow Six Siege disconnected from server

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

If you’re looking for a good VPN, we recommend you try CyberGhost VPN (currently 77% off) and check if it solves your problem.

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

9. Disable Windows firewall

If you’re experiencing Rainbow Six: Siege connectivity issues, it’s possible that Windows Firewall is preventing the game from working properly. To fix the problem, you need to temporarily disable Windows Firewall by following these steps:

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

Want to check if your Firewall is blocking Rainbow Six: Siege? Find out how to do it right here!

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.

FAQ: Connectivity issues with Rainbow Six: Siege

  • Why do I keep lagging out of Rainbow Six Siege PC?

If you are experiencing lagging issues with Rainbow Six: Siege, it could be because your PC doesn’t meet the minimum system requirements or your internet connection is not stable. 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.

  • How do I fix Uplay connection?

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.

  • Can you play Rainbow Six Siege offline?

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.

Editor’s Note: This post was originally published in June 2018 and has been since completely revamped and updated in March 2020 for freshness, accuracy, and comprehensiveness.