Configure Security in PHP Proxy
Included in the code distribution is index.php which can act as a simply proxy for use in a PHP-enabled Apache web server. This proxy file requires PHP to be compiled with XML support (default setting in most Linux distributions). Within the PHP file are 2 arrays that are used to restrict all requests from connected web clients to only the IP addresses that the cells are located at.
List of acceptable URL prefixes.
List of*invalid* URL prefixes.
Steps to update the index.php file
Make sure you are editing the files in your web server directory and not the ones that reside in YOUR_I2B2_WC_DIR.