Answered By: Mi-Kyeong Kam
Last Updated: Sep 05, 2023     Views: 2886

There has been an upgrade of security level across all browsers, and many of our links will lead to the 'Your connection is not private' error page. The methods here generally work in resolving this technical issue. Please ensure that all your browsers' privacy/security settings are Strict/Enhanced.

Part 1: Clear Your Browsing Data

This method deletes the stored data in your browser, such as cookies or cache, images, and files.

    1. Click on the three dots in the top-right corner and then on Settings.A screenshot of a computer Description automatically generated
    2. Click on Privacy and Security option on the left and then on Clear browsing data.
    3. Under the Basic tab, tick the boxes to clear your browser cache and cookies, or go to the Advanced tab for more options.
    4. On the Time range drop menu, select All time.
    5. Press Clear data once you're done.
    6. While still on the Privacy and Security option, click on Security.A screenshot of a computer Description automatically generated
    7. Select Enhanced protection to turn on enhanced protection.
    8. Close the browser and restart the new browser to access the resource.

 

Part 2: Clear Your Browser HSTS

If the above steps do not work, repeat them in addition to these steps.

  1. For Chrome browser, search for chrome://net-internals/#hsts in the address bar. (For Edge browser, search for edge://net-internals/#hsts in the address bar)
  2. In the Query HSTS/PKP domain field, type in nus.edu.sg. This should return some values. Graphical user interface, text, application Description automatically generated
  3. Scroll down the page and enter nus.edu.sg in the Delete domain security policies and press the Delete buttonA screenshot of a computer Description automatically generated 
  4. Restart the Chrome or Edge browser (all Chrome/Edge windows must be closed) and try to access the website/domain again. 

 

     For Firefox Browser Privacy page, please select Strict  - about:preferences#privacy

  1. Open Firefox, click the Library icon and select History > Clear Recent History.
  2. In the Clear All History window, set the Time range to clear drop-down menu to Everything.
  3. Next, expand the Details menu and uncheck every option except for Site Preferences.Firefox HSTS example 2
  4. Click the Clear Now button to clear all site preferences including the HSTS settings.
  5. Restart Firefox and see if the issue has been resolved at the next startup.

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