It does work with more recent versions of Windows. I've just got it working with Windows 8 (64 bit). The trick is in the readme.txt file, where it says: "Go to the Programs menu and find the PassPort shortcut. Open the properties of the shortcut, then open the advanced page and make sure that the shortcut is executed with Administrator's rights. Otherwise the program will not be able to save configuration file in the installation directory." Having set the properties of the shortcut to "Run this program as an administrator", it works fine. Before that, it was not able to start the service, which was probably because it was unable to save the configuration file, like it says. However, I would not have discovered the readme.txt file if I hadn't looked in the installation folder: C:\Program Files (x86)\PJS\PassPort
Doesn't this claim to be open source? Where can I access the source code? All links here pointed to an .msi installer.
Did you check the "Code" tab here on SourceForge? That has the source.
The statement that this "Runs on MS Windows XP or newer" seems to be misleading, as I couldn't get this working in Windows 7. Maybe the problem was something specific to my setup, but I spent hours testing the ports being forwarded in all possible directions, and produced nothing.