If you have a page on your site (such as a music archive) that you don't want other sites to directly link to, but you want them to link to your main page, The Bouncer will make sure that no longer happens. It will redirect any user that isn't coming from your site, to the URL of your choice.
Allow access from any referrer you choose. Visitors coming from any other will be redirected to another page (such as your main page). Easy setup, only 2 variables to set. Works with SSI (.shtml) pages.