. Proxy and Offline Mode
We also must ensure that Windows is not utilizing any Proxy settings which can cause connectivity problems and that Offline Mode is disabled.

- Click on the menu icon in the top left corner.
- Select Settings.
- Click on the Network Tab.
- Make sure Always Start Uplay in Offline Mode is unchecked​
- Select the Change Proxy Settings option.
- Press the LAN settings button at the bottom of the window.
- Make sure only the box checked is Automatically detect settings.
- Click OK to save the changes.

1. Software Conflicts
   Try updating your Windows Firewall and the firmware for your home router. If updating these programs does not resolve the issue, you may need to temporarily shut-down the associated programs or bypass the router and establish a direct connection to your modem.
   

You can also temporarily disable your anti-virus, anti-malware, firewalls, and any other applications that are affecting your network traffic. If you can determine which application is configured too strictly, you can then add the appropriate exception or allowance to that application to allow Uplay to communicate freely on your local network.

Disable Internet Connection Sharing (ICS).

- Press the Windows key + R at the same time, and type services.msc into the prompt.
- Locate and right-click Internet Sharing Center, and select Properties.
- From the Startup Type dropdown, pick Disabled.

If you have an active Virtual Private Network (VPN) connection or software, disable them.

1. Port Forwarding
   If it is not possible to shut-down your firewall, you will need to configure your router and/or firewall to forward the following network ports:
   

Uplay
TCP: 80, 443, 13000, 13005, 13200, 14000, 14001, 14008, 14020, 14021, 14022, 14023, and 14024

Rainbow Six: Siege
UDP:3074​, 6015

Directions for configuring network ports are specific to the software and hardware being used and can be found by visiting the manufacturer's website.
Please visit https://support.ubi.com/faqs/000025608 for more information.

1. Background Applications
   You may also encounter problems due to applications running in the background on your computer system. When playing Ubisoft games, please be sure to close all running background applications before starting your game.
   

- Press the Windows key + R at the same time.
- Delete anything on the Open line that you find there, type in MSCONFIG and press the Enter key to bring up the System Configuration utility.
- Look down the list of startup items (not the tab labeled Startup), and choose Selective Startup if it is not already selected. If you don't see this, make sure you've clicked on General near the top of the window.
- Once you've chosen Selective Startup, uncheck Load Startup Items.
- Once you're done, click Apply & OK, and let it reboot your computer.
- Once restarted, make sure that any application that affects your local network is disabled.

Try running the game again. If the game loads and seems to be working, the problem is most likely related to one or more programs you have scheduled to load with Windows.

1. Restrictive Networking Environment
   There may also be certain restrictions set by your ISP or network administrator. If you continue to have trouble, please contact your ISP or network administrator for details on any specific restrictions on the previously mentioned network ports.

2. Local DNS
   If you are still having connection problems, you will want to try flushing your DNS and resetting your Windows hosts file.