What IP address are you connecting to via wifi? It should be in the range below.
You can list the private LAN IP addresses as it does not tell anyone anything - they are the same as everyone else. The IP address of your service provider for your WAN is what you don't provide...Everything on the inside past the modem is fine to put out. Everything on the inside, the local will fall under these ranges and you are not telling anyone anything about how to hack your system providing these ranges (basically any IP that starts out 10. or 172. or 192. are reserved for the "home side" of the service so every home internally will be within this same range):
10.0.0.0 – 10.255.255.255
172.16.0.0 – 172.31.255.255
192.168.0.0 – 192.168.255.255
Then when off the wifi or away from home, the IP address needs to be different than one of the addresses above since you are port forwarding.
Go to what is my IP address and make a not of what it says. It should be that IP address with the : and port number to access it outside of your wifi LAN.