Extensions and Extension Groups

Within Attachments, Extensions and Extension Groups represents a set of configurations that allow the board Administrator to change the behaviour of attachments regarding the extension or the group the extension belongs to.

You can change Attachment options from Admin Panel -> Attachments page

Extension Groups

An Extension Group acts much like a regular group, with the only difference that it only holds extensions of files. For example, you can create an Extension Group named "Images" and then add extensions like "jpg", "jpeg", "gif", "png" and "bmp", and another Extension Group named "Bad Files", that holds "exe", "bat", "bin" and "pif".

If you want to deny uploading of any files that extension belongs to some Extension Group, leave the "Allowed" checkbox empty. This will instruct JForum to not accept any files related to that group. On the other hand, if you want to allow upload of files for some extension group, you should check the "Allowed" checkbox

Extensions

An Extension is any regular file extension you want to configure, like "exe", "jpg", "html" and so on. When you create a new extension, you have the choice to associate it to an existing Extension Group.

If you want to deny all extensions, insert an asterisk / star ( * ) in the extension field, and JForum will handle the rest for you.

Not every functionality is working. So far, only the "Allowed" option is being processed by JForum. In the future, it will be possible to change downloading options for each distinct Extension Group as well. Upload Icon and Download Mode (Inline / Phisical) are not supported at this momment)

Examples

Here's a real world scenario: you have a set of file types that should not be allowed in the board, for security reasons. Also, you want to allow image uploading only if they are JPG, GIF or PNG.

In order to achieve that, the following steps are necessary:

First step: create the Extension Groups

For this sittuation, we'll have two Extension Groups, said "Denied Files" and "Images".

Access Admin Panel -> Extension Groups and, in the "Add new Extension Group" box, enter "Denied Extensions" in the "Extension Group" column. Leave "Allowed" unchecked, and all other fields leave with the defaults, and then click "Submit".

For the "Images" Extension Group, enter its name, but now check the "Allowed" checkbox, as we want to allow uploading of files withing this group.

Second step: adding Extensions

Once we have created the Extension Groups, it's time to add the extensions. Go to Admin Panel -> Extensions, and, in the "Add new Extension" box, insert "exe" in the "Extension" field, leave "Allowed" unchecked, and select "Denied Extensions" in the "Extension Group" combo. Click Submit.

Do the same for the other extensions you want to deny.

Allowing JPG, GIF and PNG, but not BMP and TIFF

To add jpg, gif and png as allowed files, do the same steps described before, but now check the "Allowed" checkbox, and select the "Images" group. To deny bmp and tiff, just leave the "Allowed" checkbox unchecked then adding them.

That's all.