To do this follow these instruction:
1. Go to Status > Internet Connection - See your IP Address - this IP is live and can be view remotely
2. Then go to NAT > Virtual Server >
Check Enable Virtual Server
add the IP and PORT number
for example in the image
I use Port 80 for Apache
81 for IIS
3000 for Rails
To get your Local Network IP address, open your console command prompt and type ipconfig
Testing Rails
Once you got disconnected, your IP address will change again just do the number 1 process again to obtain your PC new IP address.
Running Rails at 3000