Block Https://youtube.com

  Hi Team,

   I want to block YouTube in my environment irrespective of the protocol it uses. I created an Access rule to block few websites, details provided below

Action: Deny, redirect to another site

Protocols: Http, HTTPS, HTTPS server, Http Proxy and all streaming media protocols

From: Internal

To : Blocked Websites (Domain name set) 

Rule applies to: All users

Youtube gets blocked when accessed through Http protocol, whenever it’s accessed using HTTPS protocol it just connects. After few days of research I found that issue is only with Google Chrome. Whenever I accessHTTPS://youtube.com in Internet explorer the page is not displayed, but somehow Google Chrome overrides my proxy settings for this site alone.  

Note: This same rule works fine for other secured websites. (ie) I am able to blockHTTPS://Facebook.com using this same rule.

Workaround:

   I have also found a workaround to make this work. Goto Internet Explorer, Proxy server settings page, Uncheck ‘automatically Detect settings‘ . .. Now HTTPS://youtube will be blocked in all the browsers including Chrome if it’s importing proxy settings from Internet Explorer.

Question:

1. When I select ‘ Automatically detect settings ‘ option in local proxy settings why is TMG not able to blockHTTPS://youtube.com  when used in Chrome .
2. Whenever a HTTPS site is blocked, redirection doesn’t work.  As per the rule that I have set whenever a site is blocked the page should be redirected to another Webpage. This works absolutely fine when a site using Http protocol is blocked.  Whenever a HTTPS site is blocked it just says ‘Cannot display the webpage’

Thanks in advance .