What Is Err_Tunnel_Connection_Failed Error? [A Quick Guide]

The internet is an intensely helpful tool. But while surfing, you can encounter specific errors that hinder its utility. Ione such error that can break your smooth working is the ERR_TUNNEL_CONNECTION_FAILED error. Here is a quick review of this error to help you know its causes and fixes.

What Is ERR_TUNNEL_CONNECTION_FAILED Error?

This error message is shown when the browser you are using fails to make a proper tunnel for connecting to the website. In this case, the host user does not open, or the browser cannot make the internet connection. One of the major causes of this error is improperly using a faulty proxy while connecting to the internet.

Causes of ERR_TUNNEL_CONNECTION_FAILED Error

One of the most frustrating errors is “This site can’t be reached” because most browsers are unclear about the underlying reasons for the error. This message is also tricky as it appears with a broad range of codes.

For instance, you can get the same notification if you see the DNS_PROBE_FINISHED_NXDOMAIN error. Similarly, the same message appears when your network connection times out or if you meet the ERR_CONNECTION_RESET code. 

Most browsers use the “This site can’t be reached” error for a catch-all description for the majority of the errors. The most common causes can be summarized into the following major categories:

  • Domain Name System resolution errors
  • Network Connections timed out.
  • A general failure of the internet connection
  • Misconfigured internet
  • Misaligned network
  • Misconfigured firewall settings

Once the reason for the error message is known, you can quickly figure out the fixes.

How To Fix the ERR_TUNNEL_CONNECTION_FAILED Error?

Here are the ways to fix err tunnel connection

1. Disable the Proxy Settings

It’s the only and easiest remedy mentioned by the experts to fix the errors shown by the browsers. If your system entails some proxy settings, there are great chances that you will encounter this error message. 

In this case, changing the settings will work. Following are the steps for proxy setting change:

1. On your keyboard, Press Windows Key + R, and you will open RUN

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2. Now Type inetcpl.cpl in the RUN pop-up box

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3. Press Enter

4. You will be directed to the Internet Properties; now click on the Connections Tab

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5. Now select the option LAN Settings

6. A separate window gets opened; unselect the option stating, “Use a proxy server for your LAN.” This will activate the “Automatically detect settings “option.

7. Click the OK tab to ensure that the setting is applied.

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After applying these settings, close down all the windows. Now restart the system and open the browser. If the issue is resolved, enjoy browsing but if it persists, try applying some other fixes as mentioned below.

2. Reset Your Network Settings:

One way to remove this error is to restart your Network settings. But first, you will need to reset the TCP/IP and remove DNS. Follow the below steps to reset the network settings:

  • Start the administrator mode in your system and open the command prompt.
  • Press the Windows button to open the Start menu
  • Open the start searches bar and type Command Prompt
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  • Right-click on the command prompt.
  • Now open the drop-down menu and select the Run as Administrator option

Write the below commands one after the other

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  • IPCONFIG /FLUSHDNS
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  • NBTSTAT –R
  • NETSH INT IP RESET
  • NETSH WINSOCK RESET

After executing the commands successfully, restart your system. Open the browser to check whether the error is fixed or not. If it persists, try other fixes.

3. Changing the DNS Address

The IPv4 DNS address in the system must be set in a way that fetches the DNS server address automatically, or else it should be set to the DNS address given by your Internet Service Provider. If your system is not set to any of these settings, then the chances of getting Similar errors are very high.

In this case, work on the DNS address settings on your system and check if the DNS server address is not responding. Below mentioned are the steps:

On the right side of the screen lies the taskbar at the bottom; check the Network icon in this bar. The same icon enables the user to connect to the Wi-Fi network through any system. Right-click on the Network icon. Select the Open Network and Sharing Center option.

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1. Once the window opens, move to the option

2. View the section titled “active networks.”

3. Click on the particular network your system is currently connected with

4. It will open the Internet Connection Status.

5. Click on the option titled “Properties.”

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6. Go to the select Networking tab and search for the Internet Protocol Version 4 (TCP/IPv4), double click on it.

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7. When you open IPv4, you will see whether the DNS is adjusted to obtain the address automatically or set to some other fixed provided value. Ensure that any one of the DNS server address options is accessible. Once done, manually enter the DNS server address.

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8. After applying the DNS address, select the Validate settings option before deciding on the exit option. Click on the OK button to apply the DNS settings.

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4. Flush Your Browsing History

Sometimes, the browser is the culprit. Try to use the internet with another web browser to check whether this is the case. 

If the error does not occur with a new browser, then the browser is the root cause. In this case, your stored browsing history may be pushing your system to trigger this error. Follow the steps below to clear the record.

1. In the URL bar, type Browser name://settings and press the Enter button to open the Settings option

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2. A drop-down menu will appear; click the Advanced option here.

3. Now select the option titled “Privacy and Security section,” here, choose “Clear Browsing Data.”

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4. A new window will appear. Here select the particular data that you want to drop-down delete from the browser.

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5. After clearing the data, restart the browser to see the reoccurrence of the error. In most cases, you will get rid of the err_tunnel_connection_failed error.

Conclusion

Errors and problems are part of the networking and technology world. Once handled accurately, these errors can be controlled in no time. 

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