I have few ports open on WAN (80,443 etc.). I am not interested in ingress connections from static ip addresses, which are mostly hosting companies who want to advertise or systems who want to practice their hack knowledge on my network. It was just a experiment i want to test and see if it works for me. But just like Tom wrote the list would probably be very large and eats away a lot of pfSense resources. It was just a wild idea and i was also interested if it could be done.