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How can we add files to the whitelist to hide from the public eye? We want to have AJAX and use a custom file, but we can't because it hides it from the public.

You can add a file using the 'no_check_files' filter. Use this: function add_my_cool_filter($data) { // You have to accept the $data argument or else it will cause a system meltdown ;) $data[] = 'my-file-name.php'; // JUST the file name. return $data; } add_filter('no_check_files', 'add_my_cool_filter');

Simple.

How can I get back in if the plugin locked me out?

You can create a .txt file named 'disable_auth.txt' in your wp-content/plugins/lockdown-wp-admin/ folder (The file location would be /wp-content/plugins/lockdown-wp-admin/disable_auth.txt). We don't care about the content but that will disable the HTTP Auth and whatever was locking you out of your site.