During the web browsing, your journey can be stopped by the common “ERR_TUNNEL_CONNECTION_FAILED” error message. This error typically occurs when there’s a breakdown in the connection between your browser and the target server, preventing the establishment of a tunnel. In this article, we will present six ways to fix the “ERR_TUNNEL_CONNECTION_FAILED” error message.
What does the ERR_TUNNEL_CONNECTION_FAILED mean?
This error message occurs when the connection between the browser and the target server is broken and the tunnel can’t be successfully established.
How to fix ERR_TUNNEL_CONNECTION_FAILED?
1. Check Internet Connection
Ensure that your internet connection is stable. A fluctuating or unreliable connection can contribute to tunnel connection failures. Consider restarting your router or connecting to a different network to rule out connectivity issues.
2. Review Proxy Settings (And disable them if it’s needed)
If you’re using a proxy server, review your proxy settings. Incorrect configurations or server unavailability leads to tunnel connection failures. In the majority of cases, this problem can be solved by the proper configuration of your proxy. You can set the OS to detect proxy settings automatically. Disabling the proxy temporarily can be a good way how to test if this is the source of the problem.
On a Windows machine, do the following:
1. Press Windows Key + R to open RUN
2. Type the following command
inetcpl.cpl
3. Click on the OK button. A window with the Internet Properties configuration will pop up.
4. In this window, navigate to Connections -> LAN Settings
5. On the next screen, you should be able to check if a proxy server is in use by OS. By default, the option “Automatically detect settings” should be enabled, and “Use a proxy server for your LAN.” should be disabled. If you have set them up, click on the OK button to apply the changes.
After this setup, try to check if the error persists. We recommend also restarting the PC to be sure that the new configuration is applied. Otherwise, check out the following steps in the tutorial below.
3. Reset Internet Settings
Another possible way how to solve the ERR_TUNNEL_CONNECTION_FAILED is via network setting reset. This can be done using the following approach:.
1. Open the Command Prompt.
2. Just click on the start menu and type “Command Prompt” or simply “cmd”.
3. After the icon of the command prompt appears, right-click on it and select the “Run as Administrator” option in the menu.
4. Type the command below to flush DNS and reset the DNS cache using the following commands. Type them one by one.
IPCONFIG /FLUSHDNS NBTSTAT –R NETSH INT IP RESET NETSH WINSOCK RESET
After the last command, try to restart and verify if the issue is solved.
4. Change the DNS server
DNS servers are by default set by your Internet Service provider. If this one is not working, you can change it to use another specific DNS server. You can do it by following the steps below.
1. Select the active internet connection.
2. In Windows, select the network icon in the lower right corner (Wi-Fi or Ethernet, based on your connection).
3. Right-click on it, and then choose the Properties option.
4. In the Properties window, click on the Edit button next to the DNS server assignment
5. In the new Window, change the preselected option Automatic (DHCP) to “Manual”.
6. In the new Window, choose/enable the IPv4 option from the list.
7. Once you open that IPv4 window, type the following nameservers:
Preferred DNS server: 8.8.8.8 Alternate DNS server: 8.8.4.4
These two DNS servers are reliable and provided by Google. When you are done, click on the OK button to apply the DNS settings.
After these steps, try to restart and verify if the issue is solved (more hints on DNS settings you can find in separate post).
5. Clear Browser Cache
Cached data or crashed files in your browser may contribute to connection issues. Clear your browser cache and cookies to eliminate potential conflicts. Restart the browser after clearing the cache, and check if the issue is gone.
6. Check Browser Extensions
Browser extensions can harm your network connections. Disable extensions one by one to identify if a specific extension is causing the tunnel connection failure.
Wrapping Up
After reading this article, you already know six ways to solve the “ERR_TUNNEL_CONNECTION_FAILED” error. Some discount can be found in this page.Investigation into potential causes, starting from network through proxy configurations to browser settings, offers several possible areas of the issue. By systematically addressing each possibility, you can find and eliminate the issue, restoring smooth web browsing experiences. We hope, our suggestions helped you solve the problem. If you encounter similar problems, check out other articles on the page.
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