Fix: Rainbow Six Siege Connection Failure Error 2-0x0000c015

Fix: Rainbow Six Siege Connection Failure Error 2-0x0000c015

Rainbow Six Siege has been popular among gamers for its immersive and dynamic gameplay. However, players have been facing a frustrating issue lately – the Connection Failure Error 2-0x0000c015. This error prevents players from connecting to the game, leaving them unable to indulge in their favorite form of entertainment. But don’t worry, as we have compiled a comprehensive guide to help you fix this error and get back to your gaming sessions in no time. Read on to find out the possible reasons for this error and the steps you can take to resolve it.

1. Disable Third-Party Antivirus

1. Disable Third-Party Antivirus

In today’s digital age, antivirus software has become an essential tool for computer users. It helps protect our devices from various online threats, such as viruses, malware, and phishing attacks. However, there are instances where disabling third-party antivirus may be necessary. Whether you need to troubleshoot a problem or install a new software, disabling your antivirus can sometimes be a temporary solution. In this blog post, we will discuss why and how to disable third-party antivirus on your computer.

Why disable third-party antivirus?

1. Software installation: Antivirus software can interfere with the installation process of new software. Sometimes, it may mistake a legitimate software as a threat and prevent it from installing. In such cases, disabling the antivirus temporarily can help with the installation process.

2. Troubleshooting: If your computer is experiencing performance issues or crashes, it may be due to conflicts between the antivirus and certain programs. Disabling your antivirus can help you determine if it is the cause of the problem.

3. System updates: Sometimes, antivirus software may prevent your computer from installing important system updates. Temporarily disabling it can allow the updates to install smoothly.

4. Incompatible software: Some software may not be compatible with particular antivirus programs, causing them to malfunction. Disabling the antivirus can help you determine if it is the cause of the compatibility issue.

How to disable third-party antivirus?

Before disabling your antivirus, make sure you have an alternative method to protect your computer, such as Windows Defender. Here is how you can disable third-party antivirus on your computer:

1. Locate the antivirus software icon on your taskbar or system tray and right-click on it.

2. Look for an option to temporarily disable the antivirus, such as “Pause Protection” or “Disable Shield.”

3. If prompted, select the time period you want the antivirus to stay disabled.

4. Alternatively, you can open the antivirus program from your system’s Control Panel and look for an option to disable it.

5. Some antivirus programs may require a password or confirmation before disabling. Provide the necessary information to proceed.

6. Once disabled, the antivirus should have a notification on your taskbar or system tray. Remember to re-enable it when you are done with your task.

7. If you are having trouble locating the disable option, you can refer to the antivirus’s manual or contact their customer support for assistance.

In conclusion, disabling third-party antivirus may be necessary in some situations, but it is important to remember to re-enable it once you are done. Leaving your computer unprotected can leave it vulnerable to threats. If you are unsure about disabling your antivirus, it is always best to seek help from an expert. Stay safe online!

2. Flush your DNS

2. Flush your DNS

DNS (Domain Name System) is a fundamental part of the internet that translates human-readable domain names into IP addresses, allowing devices to communicate with each other. Over time, your computer’s DNS cache can become cluttered, causing slower internet performance and website errors. To fix this, you can flush your DNS, which clears out the cache and ensures your computer is using the latest DNS information.

Here’s a step-by-step guide on how to flush your DNS on both Windows and Mac devices:

For Windows users:
1. Open the Command Prompt by pressing the Windows key + R, then type “cmd” and hit Enter.
2. In the Command Prompt window, type “ipconfig /flushdns” and press Enter.
3. You should see a message that says “Successfully flushed the DNS Resolver Cache”.
4. Close the Command Prompt and restart your computer to complete the process.

For Mac users:
1. Open the Finder and go to Applications > Utilities > Terminal.
2. In the Terminal window, type “sudo killall -HUP mDNSResponder” and press Enter.
3. You will be prompted to enter your Mac’s password. Type it and press Enter.
4. You should see a message that says “DNS cache has been flushed”.
5. Close the Terminal and restart your computer to complete the process.

It’s important to note that flushing your DNS will not only clear out the cache, but also reset any custom DNS settings you may have. This means you may need to reconfigure your network settings if you had manually set them before.

In most cases, flushing your DNS will resolve any internet connection issues you may be experiencing, but if the problem persists, you may need to contact your internet service provider for further assistance. Additionally, it’s recommended to flush your DNS periodically to keep your computer’s DNS cache up-to-date and functioning properly.

In conclusion, flushing your DNS is a simple and effective way to improve your internet performance and troubleshoot any website errors you may encounter. With just a few quick steps, you can have a clean and updated DNS cache, ensuring smooth and efficient internet browsing.

3. Change your DNS Server

3. Change your DNS Server

DNS (Domain Name System) servers play a crucial role in the functioning of the internet. These servers act as translators, converting website names (URLs) into the numerical IP addresses that computers use to communicate with each other. However, the DNS server assigned to you by your internet service provider (ISP) may not always be the best option in terms of speed, security, and reliability. This is where changing your DNS server comes into play.

So, what exactly is a DNS server and why should you consider changing it?

A DNS server is a computer that maintains a database of domain names and their corresponding IP addresses. When you type in a website URL, your computer sends a request to the DNS server to retrieve the IP address of that website. This IP address is then used to establish a connection with the website and load its content on your device.

Changing your DNS server can have a few benefits:

1. Improved Speed: Your internet connection speed can be affected by the performance of your DNS server. By changing to a faster DNS server, you may experience quicker loading times and smoother browsing.

2. Enhanced Security: Many DNS servers provided by ISPs are vulnerable to cyber attacks and can leave your network susceptible to hacking and phishing attempts. Changing to a more secure DNS server can help protect your personal information and keep your online activities private.

3. Better Reliability: DNS servers can sometimes go down or become overloaded, resulting in the inability to access certain websites. By switching to a more reliable DNS server, you can avoid these issues and have a more stable internet experience.

Now that you understand the benefits, here’s how you can change your DNS server:

1. Identify a new DNS server: There are many free DNS servers available such as Google DNS ( and and OpenDNS ( and You can also use a DNS benchmark tool to find the fastest and most reliable server for your location.

2. Change the DNS server on your device: The process of changing DNS servers may vary depending on your device and operating system. In general, you can go to the Network Settings and find the option to change your DNS server. Simply enter the new DNS server address and save the changes.

3. Change the DNS server on your router: Changing the DNS server on your router will affect all devices connected to your network. To do this, access your router’s settings and look for the DNS server options. Again, enter the new DNS server address and save the changes.

Changing your DNS server may seem like a small step, but it can have a big impact on your internet experience. By considering the benefits and following the simple steps, you can enjoy a faster, more secure, and reliable internet connection. So, don’t hesitate to explore different DNS server options and find the one that works best for you.

4. Forward Ports used by Rainbow Six Siege

4. Forward Ports used by Rainbow Six Siege

Rainbow Six Siege, a popular tactical first-person shooter game, is played by millions of gamers worldwide. It relies heavily on online multiplayer gameplay and requires a stable internet connection for smooth gaming experience. However, sometimes players may face connectivity issues due to network restrictions or router settings. In such cases, forwarding the ports for Rainbow Six Siege can help improve network performance and reduce lag.

Here are the ports that need to be forwarded for a better gameplay experience in Rainbow Six Siege on PC, PlayStation, and Xbox:

1. TCP: 80, 443 – These ports are used for the connection between the game and the internet. Without them, the game will not be able to communicate with the online servers.

2. UDP: 10000-10099 – These ports are used for matchmaking and connecting players to each other in a game session. Without them, players may experience delays or disconnections during multiplayer gameplay.

3. UDP: 50000-50099 – These ports are used for voice chat during online sessions. Forwarding these ports will ensure clear and uninterrupted communication between team members.

4. UDP: 3478-3480 – These ports are used for Universal Plug and Play (UPnP) which allows players to connect to other networks and devices. Enabling UPnP on your router may also help improve connectivity for Rainbow Six Siege.

To forward these ports, you will need to access your router’s settings. The process may vary depending on your router model, but the general steps are as follows:

1. Find your router’s IP address by typing “ipconfig” in the command prompt (on Windows) or “ifconfig” in the terminal (on Mac).

2. Open a web browser and enter your router’s IP address in the address bar.

3. Log in to your router’s settings by entering the username and password. If you are unsure of these details, refer to your router’s manual or contact your internet service provider.

4. Look for the “Port Forwarding” or “Virtual Server” section in your router settings. This may also be labeled as “NAT” or “Firewall” on some routers.

5. Add each port separately, along with the protocol (TCP or UDP) and the IP address of your gaming device (PC, PlayStation, or Xbox). You can find your device’s IP address by typing “ipconfig” (on Windows) or “ifconfig” (on Mac) in the command prompt or terminal.

6. Save the changes and restart your router.

Once the ports are forwarded, your router will prioritize the game’s traffic and allow for smoother gameplay in Rainbow Six Siege. It is important to note that port forwarding can potentially expose your network to security risks, so make sure to only forward these ports and not others.

In addition to forwarding the ports, here are some additional tips to improve network performance for Rainbow Six Siege:

1. Use a wired ethernet connection instead of Wi-Fi. This will provide a more stable and consistent connection.

2. Limit the number of devices connected to your network while playing Rainbow Six Siege to reduce network congestion.

3. Close bandwidth-heavy applications, such as streaming services, while playing the game.

Following these steps and forwarding the necessary ports should help optimize your network for Rainbow Six Siege and provide a smoother gaming experience. Happy gaming!


In conclusion, the Rainbow Six Siege Connection Failure Error 2-0x0000c015 can be a frustrating issue for players, but there are several steps that can be taken to fix it. Using a wired connection, resetting network hardware, and adjusting the game’s network settings are all possible solutions. If the error persists, players can also reach out to Ubisoft support for further assistance. With these troubleshooting tips, players can hopefully overcome this issue and continue enjoying the immersive gameplay of Rainbow Six Siege.

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