We have two solutions (Web Content Filter and URL Content Filter) to block facebook (https).
URL Content Filter, which blocks websites by inspecting the set of URL keywords, may fail to block when the browsing is encrypted by SSL/TSL. We then bring out the DNS Filter to enhance the blocking ability of Web Content Filter and solve the encrypted issue.
Web Content Filter has all the websites Categorized, and makes blocking facebook (https) much easier and more efficient.
For detailed information, please refer to the following topic:
Note: The DNS Filter is not supported on all the models. It’s suggested to check the availability with our Live Web Demo.