If you need to map a TCP or UDP port from your own machine to another or to restrict the access to a server on your machine based on the IP address of an incoming connection request. If these features interest you, PortMapper is then for you. With this software, it is possible to give an IP address to a port of your machine and another on another machine. Its use requires knowledge in network and server administration. It is a good tool for preventing intrusion on a server, especially those using proxy websites. It is free from this website.