The primary goal of the Portspoof program is to enhance your system security through a set of new camouflage techniques which spoof all ports open and also emulate valid services on every port. As a result, any attackers port scan results will become fairly meaningless and will require hours of effort to accurately identify which ports have real services on and which do not.
The tool is meant to be a lightweight, fast, portable and secure addition to any firewall system or security system.