The FreeRadius.net package built for windows uses the XYZservice.exe wrapper tool to start a normal application as a service. However on Windows 2008 and higher the service starts but RADIUS is not listening on the configured ports. You can check if it is listening with netstat.
netstat -an | findstr 1812
The Debug mode of FreeRadius.net (using the provided batch file) however works fine. It seems the built radiusd.exe will not start with the default options on Windows 2008 and higher. You can check this by manually starting from a command prompt:
C:\FreeRADIUS.net\bin\radiusd.exe -f -d C:/FreeRADIUS.net/etc/raddb
So that is the reason why the service doesn’t start.
Solution: COnfigure the XYZservice to start the application with the debug parameters.
CommandLine = C:\FreeRADIUS.net\bin\radiusd.exe -d C:/FreeRADIUS.net/etc/raddb -AX
Now if you start the FreeRadius.net service and check with netstat you will see the RADIUSD.exe listening