Rainbow Six Siege Server Connection Error [How to Fix]

Tom Clancy’s Rainbow Six: Siege is a tactical shooting game that’s similar to Splinter Cell. However, some Windows users have reported connectivity issues while trying to play the game. The game requires a network connection to run, and these issues seem to be random and affect some systems’ network connections. Fortunately, there are some possible fixes that you can try to resolve the connectivity issues. Keep trying the fixes until your game works fine.

How to fix Rainbow Six: Siege connection issues on Windows?

Are you struggling with connection errors on Rainbow Six Siege servers? Fortunately, solutions are available to fix Tom Clancy’s Rainbow Six Siege connection issues on Windows 10. Let’s explore some of these solutions together.

Check your antivirus:

Yes, Antiviruses sometimes block games from accessing the web. Herewith, Rainbow Six: Siege, you might be encountering something similar. To fix that, you can try including the game in your current antivirus exclusion list of applications. It will disable internet protection for Rainbow Six: Siege. If you are not sure how to add your application to the exclusion list, then you can just completely disable your antivirus or uninstall it.

Yes, uninstalling seems a bit too much, but check if uninstalling the antivirus works for you. If it does, you know who is the culprit behind your connectivity issues. After that, install another antivirus that does not have similar problems.

Forward your ports:

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

Game Ports:
UDP: 6015

Just forward these ports to your PC’s network connection. It will allow for the best possible connection for the game. If you want to know how to do it, go to the official website of your system’s hardware manufacturer and search for the guide on forwarding ports. Different manufacturers will show different guides, so verify the hardware on your system correctly.

Check your background applications:

Sometimes, a particular application might cause your connectivity issues on Uplay. So, you have to disable all the start and background processes to see if that is the reason behind your connectivity issues.

Press and hold Windows Key+R, enter msconfig in the box, and press Enter.
Here, click on the services tab, check to hide all Microsoft services, and then click on the Disable All button.
Now click on the Startup tab and click on Open Task Manager.
A list of applications will appear here under the task manager startup tab. Right-click on all of them and select disable.
After disabling all apps on the task manager’s startup tab, close the task manager.
Now, in the msconfig windows, click on apply and Ok.

Restart your PC and try re-running the game. If the issue is unresolved, you must enable all those startup applications again. If the problem is solved, then you can be sure that the culprit is one of the startup applications. If the issue is resolved, follow this guide and start enabling one process after the other to see which one is causing the problem. Once you find that out, please keep it disabled and enjoy your gaming session.

Change your server:

Players of Rainbow Six: Siege sometimes encounter high ping on their local servers. As a result, the game connects to a server that is far away, and that ends, causing connectivity issues. To fix this,

Open My Documents on your PC.
Go to My Games> Rainbow Six – Siege.
Open the single directory you see here with the long filename.
Open the file GameSettings with Notepad and scroll down to the [ONLINE] section.
Here, you will see a list of servers with three-letter abbreviations next to them. For example, the US west has the abbreviation wus.
So, according to your location, change the value next to DataCenterHint. If you want to set it to the US west, then edit it and change it to DataCenterHint=wus. Save the notepad file and then close it.

Try opening up the game again and see if the problem still arises. If it does, then move on to the next fix.

Automatically Detect LAN Settings:

Click on the search box and search for Internet Options.
Open Internet Options and then click on the Connections tab on top.
Next, click on LAN settings.
In the window that pops up, check the box next to detect settings Automatically.
Click on Apply and save the changes.

Now try re-running your game and see if the problem still exists. If it does, then try the next fix.

Verify The Integrity Of Game Files:

You can check the files of your game directly from Steam. For this,

Open Steam and go to the library.
Right-click on Rainbow Six: Siege and click on properties.
Click on the tab local files, and click on the button “Verify integrity of game files.”
Wait till the verification is done and see if there is an issue with your game files.

If any missing file report shows up, then reinstall the game, and if nothing comes up, then move on to the next fix.

Check if there are any blocked ports:

Some ISPs put blocks on specific ports. So try contacting your ISP and check for any blocks from their end. If there is some block on Uplay’s servers, sort it out with your ISP.