Typically, if you try to access a directory (rather than a file) that exists on your server, and there isn’t an index page (index.html, index.htm, index.php, default.html, default.htm, default.php) your web browser will display a list of all the files in that directory. You can then click on any of the files to view or download them. If you don’t want to allow people to do this (a good idea if you have sensitive files stored in a directory inside your public_html directory), then you can use the Index Manager to turn off directory listing on a per‑directory basis.

Just click on the directory you want to turn on/off directory listing in and then choose the level of protection you desire. Leave the directory set to the default system setting, do not allow any directory indexing, provide only a plain text listing of documents, or provide a list that includes text links and small graphics to represent the type of file or directory the item listed is. Click Save to commit your changes...