7 Ways to Fix the Rainbow Six Siege Server Connection Error 3-0x0001000B

Error 3-0x0001000B is a common connection issue for Rainbow Six Siege players have reported on forums and Reddit. That error has a message that says, “Rainbow Six Siege server connection error. The Rainbow Six Siege servers are unreachable… error code [3-0x0001000B].” Consequently, players can’t play the game because it can’t connect to servers. Here are some ways you can fix the Rainbow Six Siege server connection error on a Windows 11/10 PC.

Check the Server Status for Rainbow Six Siege

The Rainbow Six Siege server connection error can sometimes arise because of a server-side issue. Or the game’s server could be down for scheduled maintenance. Click PC on this server status page for the game to check if there’s any issue highlighted there. If there is, wait a day or two and then try playing Rainbow Six again.

The Service Status page for Rainbow Six Siege

Power Cycle Your Router

This is quite a simple potential resolution for the Rainbow Six Siege server connection error to apply. Simply unplug your internet router for about a minute. Then plug the router back in and wait about five minutes for all its lights to come back on.

Flush the DNS Cache

Flushing the DNS cache is a resolution for the Rainbow Six Siege server connection error some players have confirmed to work for them. To do that, you’ll need to execute a command for flushing the cache. This is how you can flush the DNS cache on a Windows 11/10 PC.

1. Press the Windows logo keyboard key + S to activate a search box.
2. To find the Command Prompt, type cmd into the file finder tool.
3. Click the Command Prompt search result with the right mouse button to select Run as an administrator.
4. Next, input ipconfig /flushdns and execute that command by pressing Enter.
   
   

   The ipconfig /flushdns command

5. Execute an ipconfig /release command.
6. Finally, execute the ipconfig /renew for renewing your PC’s IP address.

Set a Different DNS Server for Your PC

Error 3-0x0001000B can arise because of unreliable DNS servers. To remedy that, try switching your PC’s DNS server to Google. You can configure a Google DNS like this.

1. To activate the Run command dialog, hold down the Windows keyboard button and press R.
2. Next, type in ncpa.cpl (for opening Network Connections) and click Run’s OK button.
3. Right-click the internet network adapter to open a context menu and select Properties.
4. Double-click on Internet Protocol Version 4 to bring up an IPv4 window.
5. Click on Use the following DNS server addresses.
6. Next, click inside the Preferred DNS box and input 8.8.8.8 there.
7. Enter 8.8.4.4 for the Alternative DNS server box.
   
   

   The DNS server settings in Windows

8. Click OK on both windows to close them.

Allow Rainbow Six Siege Through the Windows Firewall

A Windows firewall block for Rainbow Six Siege could be causing error 3-0x0001000B on your PC. So, check if Rainbox Six is allowed through your PC’s firewall. This Microsoft guide page tells you how users can add apps to the Windows firewall’s allowed list. You must also have the Public and Private checkboxes selected for the Rainbow Six Siege entry on that allowed list.

The allowed apps list for Windows firewall

Do the same for any third-party firewall installed on your PC. Numerous antivirus apps incorporate firewall components that could block Rainbox Six Siege much the same. So, add Rainbow Six Siege to the allowed list of any third-party firewall on your PC for security apps like Avast Antivirus and Bitdefender.

Edit the GameSettings File

Players confirm changing a UseProxyAutoDiscovery value within the GameSettings file can fix the Rainbow Six Siege server connection error. The GameSettings file includes numerous confirmation settings you can edit outside Rainbow Six. Try editing that file as follows.

1. Click on the taskbar’s File Explorer shortcut.
2. Next, click on the Documents > My Games > Rainbow Six Siege folders in File Explorer.
3. Next, open the folder with the long random character name, such as 7564b1ec-0856-4f93-8aef-71232c035d75. However, that folder’s name can vary.
   
   

   The Rainbow Six Siege folder

4. Right-click the GameSettings file and select the Open with > Notepad options.
5. Scroll down the GameSettings file to the UseProxyAutoDiscovery setting.
6. Delete the 0 value for the UseProxyAutoDiscovery setting and replace it with 1. The setting should then be UseProxyAutoDiscovery=1.
   
   

   The UseProxyAutoDiscovery setting

7. Press Ctrl + S to save the file.

Some users have also been able to resolve the Rainbow Six Siege server connection error by changing the DataCenterHint setting in the GameSettings file. Erase the default value for that setting, and replace it with the most geographical server region in the DataCenterHint list within the GameSettings file. For example, DataCenterHing=westus would be most geographical for a person in California.

Verify Rainbow Six’s Files

If none of those solutions fixes error 3-0x0001000B on your PC, Rainbow Six Siege could have corrupted files. The best way to remedy that is to run a file verification scan in Steam or Epic Games. These Steam help and Epic support pages include instructions for verifying game files.
Applying those potential solutions will probably fix the Rainbow Six Siege server connection error 3-0x0001000B on your Windows PC. However, I can’t offer any guarantees because there isn’t a surefire way to resolve this issue. Click Contact Us on this Ubisoft page and select Rainbow Six Siege to send a message to the game’s support service if further possible fixes are required.