If you are a Google chrome browser user, at one point when browsing sites, you have experienced to see an error message of the ERR_TUNNEL_CONNECTION_failed error. Usually, when you visit a site, your browser sends a request to different servers and expects the servers to fetch the data back to the client. Error ERR_TUNNEL_CONNECTION_FAILED when using Chrome; why and how to fix it?

The server fails to fetch the data when this error comes after a request to other sites. Don't worry; the problem can come from your side, and we got you back as we have various ways to show you how to fix that error.



ERR_TUNNEL_CONNECTION_FAILED is an error message displayed in your web browser, such as Google Chrome. The error is caused by a tunnel problem that prevents your browser from establishing a secure connection through your proxy or a Domain Name System (DNS). To elaborate more, let's understand what a tunnel is; it is a type of connection that secures data transmitted over a network.

For instance, when you want a safe connection when visiting a website using a google chrome browser, you will use a proxy server to connect. If there is an issue with the connection between your browser and proxy, you will receive the ERR_TUNNEL_CONNECTION_FAILED.

To fix this error message occurring on your browser, there are five ways to troubleshoot this error caused by proxy and DNS in both Windows and macOS that we can follow.

1. Disable proxy settings

One of the main causes of the ERR_TUNNEL_CONNECTION_failed error is caused by issues with the proxy server. To fix this problem, you must configure the OS using a specific server or detect proxy settings automatically.

Here is a quick way to fix the error in Windows by opening the command prompt (cmd) and entre inetcpl.cpl. Through this command, you will open the Internet properties configuration window. In that window, select the Connections tab > LAN setting.

Internet Properties LAN Settings

In that particular tab of the LAN setting, you can check on the proxy server screen to confirm if your window is using any specific proxy server. Always note that your internet connection is configured to detect proxy settings automatically by default, and if it is disabled, you can try to put it on temporarily.

If you are done enabling automatic configuration, you can check if the error message in the browser has disappeared when you have reloaded the page. If the error message persists, you can disable the manual setup and the automatic proxy configuration. Doing this allows you to navigate the web without having a proxy in your connection.

2. Reset network settings

Another effective way to troubleshoot to remove the error message is by resetting your network settings. This action helps since you can renew your computer IP address and flush the local DNS cache.

In Windows, you can try to reset the internet settings by opening the command prompt as an administrator, and you can type the commands listed one by one as you execute each command respectively:


Reset network settings

When you are done executing the last command, reload your browser and see if the error stills occur. If it does, then the issue might revolve around the DNS configuration.

3. Change the DNS server

Configuring the DNS server is one way to solve the ERR_TUNNEL _CONECTION_FAILED error. Typically, your OS is provided a  DNS server from your internet service Provider (ISP). But you can still use a specific DNS after configuring the system.

To solve the error message on your browser, you need to change your current DNS configuration, which might cause the problem. Here are a few steps you can follow to check your Windows configuration:

Step 1: Open the network status screen

Step 2: Go to Advanced network setting > change adapter options

change adapter options

Step 3: Go to your active network connection and right click on it and select

Step 4: You will see a popup appearing; ensure to select the Internet Protocol Version 4 (TCP/IPv4) and click on properties.

Internet Protocol Version 4

Step 5: You will see the following window where you can configure your IP and DNS setting using a public DNS and other options such as Cloudflare, Cisco OpenDNS, and Google public DNS.

Using this public DNS will assist your page loading times, therefore what you need to do is to enter the DNS server address and try to refresh your browser, and check if the ERR_TUNNEL _CONECTION_FAILED message has disappeared; it does not, then there is an issue with your custom DNS address you have used.

4. Update or reinstall Chrome

YouTube video

If you have tried to change the DNS server or disable the proxy and other troubleshooting options, you can try to update or reinstall your google chrome browser to fix the ERR_TUNNEL _CONECTION_FAILED error. Therefore you can start by updating Google Chrome, and here are a few steps you can follow:

Step 1: Open Google Chrome and click the three dots icon in the top right corner.

Step 2: Click on “Settings” from the dropdown menu.

Step 3: Scroll down and click on “About Chrome” on the left-hand side.

Step 4: Chrome will automatically check for updates; you must install them if any are available.

Update or reinstall Chrome

When the installation is done, try to run the page with the error message and see if it works. If it's not working, you can try this alternative method of reinstalling the Google Chrome application. You can follow the steps as follow:

Step 1: Uninstall Google Chrome from your computer using the Control Panel or Applications folder.

Step 2: Download the latest version of Google Chrome from the official Google Chrome website.

Step 3: Install Google Chrome on your computer by following the prompts.

Now you can proceed after reinstalling Google Chrome by trying to reaccess the website to see if the  ERR_TUNNEL _CONECTION_FAILED error has been resolved.

5. Check Chrome extensions

Check Chrome extensions

Google Chrome browser allows a user to have various extensions installed in the browser to have the best function out of the browser. However, these extensions come with multiple problems you may encounter while using the browser, and one of the issues is the ERR_TUNNEL _CONECTION_FAILED error. To diagnose this error, you may have to look at your installed extensions and determine which is causing this issue in your browser. To remove this error, you can follow the steps below:

Step 1: Open Chrome, and at the top right corner, select the three dots and click the New Incognito window.

Step 2: When in this Incognito window, try to load the sites and see if you will experience the error.

Step 3: If the site loads well without issues, your problems come from the installed extensions.

Step 4: To your standard window, go back to the three dots again and click it, and you can choose More tools> Extensions.


Step 5: At this point, try to put off all extensions except one extension and try to load the site; if it's working well, repeat the process by enabling another extension while the rest are off. Try all the extensions until you get the extension that will give the error when loaded, and get rid of the extension or disable it.

6. Clear Cached data and restore.

Sometimes the ERR_TUNNEL _CONECTION_FAILED error. This may result from your previous data interfering with your recent browsing sessions. To fix this issue, try to clear cached data in your Chrome past data and restore it. Follow the steps below to resolve this error on your browser.

Step 1: In your Chrome address bar, enter the address below, and You will see a dialog box where you can clear your cached data. chrome://settings/clearBrowserData

Clear Cached data and restore

Step 2: Go to a Time range, select the time range in the dropdown menu, choose the type of data you want to get rid of, and select clear data.

Step 3: After deleting your browsing data, restart your Chrome and try to load the sites again if they work.


Google Chrome browser has a unique error that comes when users try to visit sites and the site's servers fail to fetch back the data from the requests sent by the browser. This error is an ERR_TUNNEL _CONECTION_FAILED error generally caused by the proxy server setting of your machine and the DNS and other causes that can affect the error. To fix the issues, we recommend the five ways explained above to fix the error.

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