Port forwarding the CtrlX webpage?

I have a CtrlX instance running succesfully for a datalogging (energy). This device is running from home, and I like to be able to log in from a different location (to use as demo material). Do I only need to port forward the port 80 of this local address? 

For example:
192.168.0.10:80 -> 10.11.12.13:3000

With 192.168.0.10 the address of the ctrlX in the local network (LAN IP)
With 10.11.12.13 the WAN IP 
With 3000 as an example. 

Would this be correct? Because that doesn't seem to work...