In general, Err_Tunnel_Connection_Failed Error usually appears in on computers that use VPN or Proxy Severs to connect to Internet.
In most cases, the reason for this error is due to inability of the web browser to resolve VPN or Proxy connections on a Windows computer.
Hence, the quickest way to fix Err_Tunnel_Connection_Failed error in Microsoft Edge, Google Chrome or any other web browser is to disable the Proxy Server Settings and re-load the webpage that you were trying to access.
Fix Err Tunnel Connection Failed Error in Windows 11/10
If you want to continue using VPN or connect to internet using proxy settings, you will have to fix the problem using other troubleshooting steps as provided below in this guide.
1. Disable Proxy Settings
As mentioned above, disabling the proxy server settings on your computer should help in fixing this problem.
1. Right-click on the Start button and click on Run.
2. In the Run Command window, type inetcpl.cpl and click on OK.
3. On internet Properties screen, switch to Connections tab and click on LAN Settings button.
4. On the next screen, uncheck Use a Proxy server for your LAN option and make sure Automatically detect settings option is selected.
5. Click on OK to save this setting on your computer.
Aftet this restart the computer and you should be able to access the webpage.
2. Check Proxy IP Address, Password and Port
If you want to continue using proxy connections, the first step would be to make sure that you are using the right IP Address, Password, and Port for the Proxy internet connection on your computer.
Also, make sure that you are using the right Username and Password.
IP Address: To check IP Address, try to access another website using Proxy server. If you are able to access the other website, the IP Address is right.
Port: Most proxies use Port 80, but some proxy providers may user other Ports.
User Name/Password: These should be known to you.
3. Disable Automatically Detect Settings
When the browser is set to automatically detect proxy settings, it follows the settings as defined in the operating system.
In case of Windows computers, proxy settings are likely to be better optimized for Internet Explorer or Edge browser and not for Google Chrome and other browsers.
In theory, switching off the option to automatically detect settings should allow Google Chrome and other browsers to use their own settings or use the settings of the VPN Service provider.
1. Right-click on the Start button and click on Run.
2. In the Run Command window, type inetcpl.cpl and click on OK.
3. On internet Properties screen, switch to Connections tab and click on LAN Settings button.
4. On LAN Settings screen, uncheck the option to Automatically detect settings and click on OK.
Restart the computer and see if your computer is still coming up with Err Tunnel Connection Failed Error.
4. Run Network Troubleshooting Commands
Run the following network troubleshooting commands to rule out the possibility of this problem being caused due to network related issues.
1. Type Command Prompt in the Search bar > right-click on Command Prompt in the search results and select Run as Administrator option.
2. On the Command Prompt screen, type the following Commands one by one (In the same order) and hit the enter key after each command.
- netsh winsock reset
- netsh int ip reset
- ipconfig /release
- ipconfig /renew
- ipconfig /flushdns
- ipconfig /registerdns
After this, Restart the computer and try to access the internet using Microsoft Edge, Google Chrome or any other web browser that was coming up with this error message.
5. Contact Proxy Provider for Support
If you are still unable to fix the issue, visit the website of your VPN or Proxy Service provider and submit a help request.
If you are using the services of a reputable VPN service provider, you can expect them to have trained support staff to help you fix this error.