Use OH 1.8.3 outside the local network

Hello, I needed to configure OH 1.8.3 to be able to see it from outside the local network, both by 4g and other Wi-Fi networks, I have a domain in NOIP but I do not know how to configure it.
a greeting
Pd.- forgive for my English I use google translator

The easiest is to set up

A little harder and an approach that opens you up for more security risk is to use a reverse proxy. You should be able to follow the OH 2 tutorial here.