You can add a media type to a list for media type filtering.
- Select Policy | Rule Sets.
- On the rule sets tree, navigate to a rule set that contains rules for media filtering, for example, the nested Download Media Types rule set of the Media Type Filtering rule set and select it.
The rules appear on the settings pane.
- Select the rule Block types from Media Type Blocklist and click on the list name.
The Edit List (MediaType) window opens.
- Click Edit.
An Edit window opens. It displays a list of group folders with media types.
- Expand the group folder with the media type you want to add, for example, Audio, and select the media type, for example, audio/mp4.
To add multiple media types at once, select multiple media types or one or multiple group folders.
- Click OK.
The window closes and the media type appears on the filter list.
- Click Save Changes.