The error is specific to Google Chrome, which may be helpful to know if you’re willing to use another browser. That’s not always possible, though; similar errors will show up on Firefox and – god forbid – IE if you’re using them.

ERR_TUNNEL_CONNECTION_FAILED error, may occur in Google Chrome if your internet connection has some proxy settings. That’s because Chrome is unable to render the proxy response for some sites. You should consider rendering a Safe HTML removing scripts from HTML or Plain text message only stripping all HTML /Script tags may result in nonaesthetic page however it is safe.

But take it easy, this issue is not a hard error to fix. The error is where internal, trusted proxies, sending a customized error message and such customized error is not rendered ending up with an arbitrary error message at the client end no way that end point can understand why original request wasn’t retrieved.


Fix Error Solution #1: Change network settings

  1. Open Google Chrome and go to the Chrome menu and click on “settings“.
  2. Scroll down and click on “show advanced settings”.
  3. Go to Network section and click on “Change proxy settings”.
  4. Inside “Connections” tab, click on “LAN settings”
  5. Checkmark “Automatically detect settings”, then click OK and then Apply.
  6. Finally restart your PC to apply changes.

Fix Error Solution #2: Resetting your TCP/IP and flushing your DNS.

  1. On Windows Start menu find and right-click on “Command Prompt“. (Run as administrator)
  2. Type the following commands in cmd: (one by one)
  3. ipconfig /flushdns
    nbtstat –r
    netsh int ip reset
    netsh winsock reset
    resetting your TCP/IP and flushing your DNS.
  4. Restart your PC to make change take effect.

Fix Error Solution #3: General Troubleshooting

  • OPTION 1
  • Make sure Chrome is updated. Click the Chrome menu, then Help and select About Google Chrome. Chrome will check for updates and click Relaunch to apply any available update.
  • OPTION 2
  • Delete your cache and cookies. Click the Chrome menu, then select History. Now click “Clear browsing data” and in the pop up make sure you select “the beginning of time” (Browsing history, Download history, Cookies and other site and plugin data, Cached images and files) and click Clear browsing data.
  • OPTION 3
  • Reset your browser settings. Click the Chrome menu, then select Settings, Show advanced settings and under the section “Reset settings,” click Reset settings.
  • OPTION 4
  • Try to using Chrome in incognito mode.

Fix Error Solution #4: Android Issue

That means if you’re trying to use a proxy service on a mobile device running Android, you’re stuck with chrome, so you won’t be able to use a different browser unless you have a device with an alternative installed. Also, despite being chrome, the chrome://chrome/settings URL doesn’t exist. If you’re encountering the error on mobile Chrome, try these steps:

  1. Updating your version of Google Chrome. You need to go to the Play Store on an Android device and swipe over to the “my apps” tab, and then install any updates that are available for the Chrome app.
  2. Opening a new incognito tab to do your browsing there. If your issue was caused by the data being passed or a data mismatch, as mentioned in the IP authentication section, incognito should solve it by not passing as much data along. Note that if this solves the problem, you may have a Chrome extension affecting your ability to connect.
  3. Clear your mobile browser cache and cookies. Yes, this is a step you should do even on mobile devices.
  4. Clear your profile. This is sort of a nuclear option but can remove any data hampering your ability to browse via proxy. Go to your settings, app settings, and chrome settings. Once there, clear your app data. This will remove your profile, clear your local state, and reset any errant flags. Be aware that you may have to log in, input data, open old tabs, and generally restore your sessions manually.

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