You might be using the Support Center to feed your clients or customers with files they can download from the Knowledgebase articles as attachments. You might ask how you can secure the files so that only intended customers, clients, or viewers can see and download them. For example, you want that only logged in users are allowed to view or download a file that is intended for registered customers.
The files you attached on Knowledgebase articles cannot be secured or restricted on the article or file attachment level. All restrictions to your Support Center content are controlled at the category level. With Kayako's visibility restrictions, you can host content that's restricted to certain customers as well as your own support agents. You have the option to set your content as global, public, private, or inherit.
To know more about setting visibility restrictions on knowledgebase articles, please visit the Restricting Visibility of Your Support Center's Knowledgebase Content article.