REDIRECT protection type

This protection method may be used to protect embedded content like PDF files or Flash movies if the LINK protection method is not an option. We strongly recommend you to use LINK protection method for all file types when possible.
REDIRECT protection method check HTTP referrer value just like REFERER protection but when check is passed instead of simply allowing access to the file it issues a redirect to a temporary signed link. Then it operates like a LINK protection method by validating a signature and timestamp. So all embedded applications that usually don’t set HTTP referrer header uses this signed link to work. The advantage of this method is it does not require you to edit anything on your site unlike the LINK protection method. Simply set protection directory and apply. Disadvantage is that it still rely on HTTP referer header in initial request while LINK protection is free of this limitation.