TRITON - Web Security Help, Version 7.7 - Websense

Block PagesBlocking graphical advertisementsTRITON - Web Security Help | Web Security Solutions | Version 7.7.xIn some cases, Websense software displays a very small, blank image file(BlockImage.gif) instead of a standard or security block page. This occurs when:The Advertisements category is blocked, andA site tries to display an image (like a GIF or JPG file) hosted at a URL in theAdvertisements category.Advertisements are often displayed in frames or iframes on a page that also displaysnon-advertisement information. In this case, graphical advertisements typically appearas white (empty) boxes on the page. The rest of the site content displays normally.In some cases, an entire site may be made up of advertisement images. In this case, theuser will see a blank Web page in the browser instead of a standard block message.Users can tell that the site has been blocked because of the URL, which is somethinglike this:http://:15871/cgi-bin/blockpage.cgi?ws-session=If you would prefer to show an image other than the default, 1-pixel block image,simply replace the default file:1. Navigate to the block page directory on the Filtering Service machine (C:\Program Files\Websense\Web Security\BlockPages\Images or /opt/Websense/BlockPages/Images, by default).2. Make a backup copy of the original blockImage.gif file.3. Name your image blockImage.gif and copy it to the Images directory(overwriting the original file).Blocking embedded pagesTRITON - Web Security Help | Web Security Solutions | Version 7.7.xMost Web pages contain content from multiple sources (ad servers, streaming videosites, social networking applications, image hosting services, and so on). Some sitesaggregate content, pulling pieces from multiple sites into a single presentation.In these instances, users may request sites that contain a mix of permitted and blockedcontent.When a frame or iframe within a larger page contains blocked content, Websensesoftware displays a standard or security block page within that frame. When the frameis small, however, the end user might be able to see only a tiny portion of the page(perhaps not even the full block icon), and not understand why the content is blocked.TRITON - Web Security Help 119