All configuration of this extension is made in the Extension Manager.
securedDirs – here is a list of directories of your TYPO3 Server in that files should be secured.
filetype – here is defined what filetypes should be secured.
domain – this is only required for absolute filelinks to your local server, e.g. “http://my.server.com/fileadmin/image.jpg” (instead of the normal internal link that reads “fileadmin/image.jpg”.) In other words: In most cases, this value can be left empty.
cachetimeadd – the time that is added to the default or page cache, that the link to the secured element is valid.
debug level
You also need to secure all the directories and filetypes by your server configuration. This can be done with .htaccess files. Some example .htaccess files you find in the /res folder.
Note: This extension cannot secure links to files that you include in your CSS file. For example you can secure /fileadmin with the default .htaccess_deny file by putting the file in /fileadmin. You can allow /fileadmin/templates/ with the default .htaccess_allow file by putting this file to /fileadmin/template/