Payment Reminder + links for online banks

I have payment reminder working using the configuration suggested on http://wiki.mikrotik.com/wiki/Payment_Reminders which is OK and i added PayPal button for missed payments but i would like to add several more similar buttons on the webpage for online banks so customers could logon and transfer payments, i would welcome any advice on this.

How can i set online bank say 193.120.216.23 to have web access and restrict other port 80 requests.