Referring URL - post to https://esqa.moneris.com/HPPDP/myurl.php gave me Empty page

Hello,

I am trying to include the referral URL security feature to enhance the security for our hosted Moneris payment gateway page. However, I am unable to figure out what is the correct URL to add to the Allow URL list. I follow the instruction provided by Moneris and tried to post to "https://esqa.moneris.com/HPPDP/myurl.php" page but received Empty URL result. What am I missing here ?

 

Thank you

Sam