code to block direct access to source pages of iframe

we're using multiple iframes in popups and do not wish anyone+bots to directly access the iframe source page... so we would like the best method to block direct access to the iframe source pages such as: [login to view URL] [login to view URL] [login to view URL] only allowing the iframe source page to be accessed in a popup from pages on [login to view URL] if someone+bots try to visit the iframe source page, they should be redirected to our home page: [login to view URL] our website is Wordpress and we're using "iframe" type popup with the following plugin: [login to view URL] the iframe source pages are standard Wordpress pages, but only containing text; no navigation links, hence why we want to block direct access to them here is some code to assist troubleshoot a solution: we weren't able to get anything to work: 1) [login to view URL] 2) [login to view URL] 3) [login to view URL] you must have your own server with wordpress installation to test/develop on thank you. any questions please ask