The portspoof program is designed to enhance OS security through emulation of legitimate service signatures on otherwise closed ports. The general goal of the program is to make the port scanning process very slow and output very difficult to interpret, thus making the attack reconnaissance phase a challenging and bothersome task.
You can download it from the following link: https://packetstormsecurity.com/files/download/115288/drk1wi-portspoof.zip
Source: https://packetstormsecurity.com/files/115288/Portspoof-Service-Signature-Obfuscator.html