You could have downloaded NetworkActiv PortImport 2.0.6 from our software library for free. The program is included in Internet & Network Tools. This software was originally designed by NetworkActiv. The most popular versions among the program users are 2.0 and 1.0.
From the developer:
NetworkActiv PortImport allows you to access ports on computers that are behind firewalls/routers or in other situations that block your access. This essentially lets you import a port from an otherwise inaccessible computer - simply by having that computer make a single TCP connection (initiate a session) to your computer.
You may want to check out more software, such as PageScope Network Setup, Veeam FastSCP or CrossFTP Server, which might be similar to NetworkActiv PortImport.