block a refferal to domain

Hello All,

I noticed the bandwidth of a domain1 on one server is used up by calling this domain1 from another server by a domain2 on the remote server via php function to load the site like given below.

test.php on domain2

<?php
include("www.domain1.com/test.php");
?>

Is there anyway to block this kind of stealing using IP deny manager in cpanel? Or any other way?

Regards,
David