NetworkActiv PortImport is a tool that works to redirect ports in PCs that are behind a router or firewall (or have even been blocked in some way).
For this, you install a client application (called daemon) in the blocked machine, and later establish a TCP protocol session from the console of your PC with the daemon. This done, you can redirect the ports you specify.
This way, with NetworkActiv PortImport your PC will act as an intermediary for the blocked PC, letting it be accessed via TCP, HTTP, FTP or any other port without problems. The client/server component runs as a service and establishes the redirection sessions automatically.