It uses port 5000 by default. You can specify another port if you want.
Rem: If you started it from cmd.exe, you may think that it's not started but it is (it's because I compiled it like a windows apllication [no window appears])
The code came from rootkit.com (I just modded it a bit)
ZIP file now contain this prog packed with FSG (v2.0) and a version packed with UPX (v1.25)