The portspoof : Network spoofing Scanner tools
― The portspoof program is designed to enhance OS security through emulation of legitimate service signatures on otherwise closed ports. It is meant to be a lightweight, fast, portable and secure addition to the any firewall system or security infrastructure. ∙ The general goal of the program is to make the port scanning software (Nmap/Unicornscan/etc) process slow and output very difficult to interpret, thus making the attack reconnaissance phase a challenging and bothersome task. [...].
