3. Attachment Download Restrictions

Log in as a Confluence administrator, click "Confluence Administration"> "Page and Attachment Security Enhancer"> "Global Configuration", and select "Attachment Download Restrictions".

Open

"Restrict the types of attachments that can be downloaded" switch default: on.

"Restrict the types of attachments that can be downloaded" default: empty (no restriction).

"Allow preview and view of restricted attachments" switch default: on.