TRITON - Web Security Help, Version 7.7 - Websense

Refine Filtering PoliciesWhen a user requests a site, Websense Web Security Gateway solutions firstdetermine the site category, and then check for filtered file types (first by extension,then by analysis).NoteWhen multiple group policies could apply to a userrequest, file type blocking is not performed.When a user tries to access a blocked file type, the Reason field on the Websenseblock page indicates that the file type was blocked (see Block Pages, page 117).The standard block page is not displayed if a blocked image comprises just a portionof a permitted page. Instead, the image region appears blank. This avoids thepossibility of displaying a small portion of a block page in multiple locations on anotherwise permitted page.To view existing file extensions in a file type, edit file types, or create custom filetypes for filtering by extension, go to Policy Management > Filter Components, andthen click File Types. See Working with file type definitions, page 288, for moreinformation.To enable file type blocking, see Enabling file type blocking in a category filter, page287.Enabling file type blocking in a category filterTRITON - Web Security Help | Web Security Solutions | Version 7.7.xTo prevent users from accessing some file types in otherwise permitted categories:1. Go to the Policy Management > Filters page and click on a category filter name.Note that you can also edit category filters from within a policy.2. Select a category in the Categories list.3. Mark the Block file types check box under Advanced Filtering on the right-handside of the page.A list of file types is displayed.4. Use the check boxes to select one or more file types to block.5. If you want to block the select file types in all categories permitted by thiscategory filter, click Apply to All Categories.6. Click OK, then Save and Deploy to implement your changes.TRITON - Web Security Help 287