How to Fix Call of Duty Modern Warfare II Error Code BLZBNTBGS000003F8?

How to fix Call of Duty Modern Warfare II Error Code BLZBNTBGS000003F8?

If you are frequently getting disconnected while playing COD MW2, you can check,

a) Game Server status – If the game servers are under maintenance, being upgraded, or down due to technical issues then you might encounter this problem. You can check the server status from the following links,

Blizzard Twitter Account

Activision Page

Information will be provided in these links if there is an outage or any issue in the servers. You can contact their support to get additional information.

b) Local connection status - Check if your Internet connection is getting dropped frequently. If you are connected via Wi-Fi restart your router or switch over to the LAN cable to check if it resolves your issue. If the issue persists, contact your ISP to check and fix any connection issues.

Note: Make sure there are no other tasks running in parallel that are exhausting your network bandwidth while playing Call of Duty MW II.

2) Clear cache - Battle.net

Clearing the Battle.net cache folder can be useful if you are experiencing connectivity issues with the Battle.net client. However, keep in mind that this will delete all the saved data in the cache folder.

To clear the Battle.net cache folder, you can follow these steps:

1. Close the Battle.net client if it is running.
2. Press the Windows key + R to open the "Run" dialog box.
3. Type "%ProgramData%" into the Run dialog box and press Enter. Locate the Blizzard Entertainment folder.
4. Delete the folder

Restart your PC, launch the battle.net desktop app, and run the game again to see if the error is fixed.

3) Flush DNS

The DNS cache holds the DNS records for sites that you have recently visited, including the IP addresses and other related information. DNS cache stores these records locally on your computer or device so that subsequent requests to the same site can be resolved more quickly. If you flush the DNS cache, it will delete all the stored records, including any invalid or junk entries, and force your computer or device to request new DNS records from the DNS server when you visit a site.

To flush the DNS cache on a Windows computer, you can use the following steps:

1. Press the Windows key + R to open the "Run" dialog box.
2. Type "cmd" into the Run dialog box and press Enter. This will open the command prompt.
3. At the command prompt, type "ipconfig /flushdns" and press Enter.

Once the DNS cache is cleared, please restart your PC and launch the game again to check if the issue persists.

4) Change DNS Server (Google or Cloudflare)

Switching over from your ISP DNS to Google/Cloudflare DNS service will improve connection speed and performance, and provide better security and faster browsing speeds.

To change your DNS server to Google DNS, you will need to follow these steps:

1. Open the Control Panel on your computer.
2. Click on "Network and Internet" and then click on "Network and Sharing Center".
3. Click on the name of your active network connection, which is usually either "Ethernet" or "Wi-Fi".
4. Click on the "Properties" button.
5. Select "Internet Protocol Version 4 (TCP/IPv4)" from the list and then click on the "Properties" button.
6. In the "General" tab, select "Use the following DNS server addresses" and enter the following values:

For Google DNS Server:

• Preferred DNS server: 8.8.8.8
• Alternate DNS server: 8.8.4.4

For Cloudflare DNS Server:

• Preferred DNS server: 1.1.1.1
• Alternate DNS server: 1.0.0.1

7. Click "OK" to save the changes.
8. Restart your computer for the changes to take effect and launch the game again.

5) Add Inbound and Outbound rules to Windows Firewall

To create custom inbound and outbound rules for the Call of Duty Modern Warfare II game, you can follow these steps:

1. Press the Windows key + S to open the search box.
2. Type "firewall" into the search box and select "Windows Defender Firewall" from the search results.
3. In the Windows Defender Firewall window, click on the "Advanced Settings" link on the left side of the window.
4. In the Advanced Settings window, click on the "Inbound Rules" link on the left side of the window.
5. Click the "New Rule" button in the right pane.
6. Select "Port" and click "Next".
7. Next, select “TCP” and type the following ports in the field next to “Specific Local Ports”,

3074, 4000, 6112-6119, 20500, 20510, 27014-27050, 28960

Note: These ports are applicable for PC users. Click here to find more details on ports.

8. Select the “Allow the connection” option and click “Next”.
9. Ensure the “Domain”, “Private”, and “Public” options are checked and click “Next”.
10. Give the rule a name and a description.
11. Click "Finish" to create the rule.

This will create a custom inbound rule for the game in the Windows Firewall. Repeat the same steps as above but this time select the “UDP” option and complete the remaining steps.

1. Select “UDP” and type the following ports in the field next to “Specific Local Ports”,

3074, 3478, 4379-4380, 6112-6119, 20500, 20510, 27000-27031, 27036, 28960

2. Select the “Allow the connection” option and click “Next”.
3. Ensure the “Domain”, “Private”, and “Public” options are checked and click “Next”.
4. Give the rule a name and a description.
5. Click "Finish" to create the rule.

Once the Inbound Rules are created, next create 2 Outbound Rules for TCP and UDP. Follow the same steps mentioned above except in Advanced Settings select “Outbound Rules”. Use the same ports as used in Inbound Rules.

If none of the above methods worked, then try any of the approaches mentioned below,

a) Change region in battle.net application.

b) If your drivers are outdated, it would be a good idea to update all drivers on your PC.

c) Update your router firmware and restart your router.

d) Check if your anti-virus program is blocking the game. If so, add an exclusion for the battle.net folder in your anti-virus program.

e) Update the game - Call of Duty MW II and battle.net app.

f) Connect to your router's configuration page and enable UPnP (Universal Plug and Play). Usually, this option, if available on your router, is located under “Settings” or “Advanced Settings”.

g) Check Windows Defender Firewall - allow access for private and public (Modern Warfare II and Battle Net).

These are the solutions to fix the Call of Duty Modern Warfare II Error BLZBNTBGS000003F8. Hope you were able to resolve the issue and continue playing. If you found this guide useful, please share it with your friends who are facing this issue. Thank you for your time and keep visiting our site for more troubleshooting tips & guides.