ac68 port forward

Hi,

Current setup:

Sky Hub 2.0 --> TP-Link av500 homeplug --> TP-Link av500 homeplug --> ac68u (AP mode)

Inside the network I can goto the 192 address of the asus. If I wanted to be able to access that from outside my network, I am guessing I need to port foward my sky router.

Would that be inbound forward of port 80 to 192.168.0.NN of the asus router. Is it as simple as that?

Is there an asus app to get into the router setup (iOS)?

Thanks.