In general, Err_Tunnel_Connection_Failed Error usually appears in Google Chrome on computers that use VPN or Proxy Severs to connect to Internet.
In most cases, the reason for this error code in Chrome browser is due to the occasional inability of Google Chrome to resolve VPN or Proxy connections on a Windows computer.
Hence, the easiest way to fix Err_Tunnel_Connection_Failed error in Chrome would be to disable VPN or the Proxy Server Settings on your computer and re-load the webpage that you were trying to access.
However, if you want to continue using VPN or Proxy server to connect to internet, you can try methods 2 ~ 5 as provided below in this guide.
Fix Err Tunnel Connection Failed Error in Chrome
You can find below the steps to fix Err_Tunned_Connection_Failed error in Google Chrome on a Windows 11/10 computer.
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’s Chrome browser.
In theory, switching off the option to automatically detect settings should allow Google Chrome to use its 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 Google Chrome 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
Now, Restart the computer for the changes to take effect and check to see if you are still getting Err Tunnel Connection Failed Error in Chrome browser.
5. Contact Proxy Provider for Support
If you are still unable to fix the issue, visit the website of your 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.