UFBP

Universal Firewall Bypass Protocol – also known as Hypertext Transfer Protocol or HTTP. HTTP is the protocol that websites use to send and receive HTML, CSS and Javascript which allows for web pages to be rendered client side and allows the client to send data back to the server.

HTTP is nicknamed UFBP by computer security folks because since everyone wants to get on the web, it's a pretty safe bet that a firewall will have this port open and thus becomes an attack vector.