How to use ProxySG policy to block Google search filters
Last Updated May 13, 2017
Users can perform a Google web search and then filter results by images, video, and other criteria. You want to block Google image and video search, but policy gets circumvented when users filter the search; the page is not denied.
Instead of using the path in the URL to define if the client is doing a web, images, video, etc search, Google is using a parameter called tbm.