ERR_TUNNEL_CONNECTION_FAILED commonly occurs on Chrome Browser when it cannot establish a tunnel connection to the website host.
The one of another cause is when you are using the proxy to connect to the internet.

Fix Err Tunnel Connection Failed Error In Chrome

So in this article, there are different methods to get rid of this error.

Method 1) Change the LAN Settings

1. Open the Chrome Browser and select Settings.

Select Chrome Settings

2. Scroll down and click Advanced.

Advanced Change Lan Settings

3. Go to the System section and click on Open proxy settings.

Open Proxy Settings

4. On clicking the proxy settings a popup will display on the screen named as Internet Properties. In the Connections Tab click on LAN Settings.

Lan Settings

5. Finally, check the box Automatically detect settings and uncheck the box Use a proxy server for your LAN. At last, Restart your PC to apply changes.

Automatically Detect Settings

Method 2) Clear Cache and Cookies in the Chrome

1. Go to the Chrome Browser and on the right-hand side click on Three Dot Tab and select History.

History Clear Cache and Cookies

2. When you click on history a new page will open where select Clear Browsing Data. Make sure always select All time and finally click on Clear Data button.

Clear Browsing Data

Method 3) Restore the Default Settings

1. Go to the Chrome Browser and then Settings » Advanced option.

2. Scroll down and in the Reset and Clean Up Option and click on Restore settings to their original defaults.

Restore Default Settings

3. A new page will open where select Reset Settings.

Pop Up of Reset Settings

Method 4) Change the DNS Server

1. Firstly Open Control Panel then clicks on Network and Internet » Network and Sharing Center.

Network and Sharing Center Settings

2. Now click on Change Adapter Settings.

Adapter Settings

3. Right click on Ethernet a pop will open where to choose Internet Protocol Version 4 ( TCP/IPv4 ) and select Properties.

IPV4 Properties

4. Finally, replace your Preferred DNS server from to Alternate DNS server to

Replace Dns Server Address

Method 5) Change Network Settings

1. Right click on Start Menu and select Command Prompt as Administrator.

Command Prompt Administrator

2. This will brings you to the Command Prompt Window. Now type the following commands and then Restart your computer.

ipconfig /flushdns
nbtstat -r
netsh int ip reset
netsh winsock reset

That’s all  I hope this article help to know how to fix ERR_TUNNEL_CONNECTION _FAILED  Error in chrome.