[RKDinOKC]

First you need to get a dynamic dns account so you can find your public IPs. They sometimes change when your router changes it's lease info. Dynamic DNS uses an app to know when your public IP has changed. You can always goto glen.cms-okc.com or rich.cms-okc.com no matter what IP you are assigned.

Then you need to log into your router that is doing your NAT, ie giving each computer a private IP on your private network to you cable modem. And set one of your private IP as a host. Which routes public computers that try to find a host on your public IP to you private IP hosting the service. Most home routers allow just one private host. This will be required to access a private IP from another device using the internet.

Then configer a firewall on the host computer to only allow login to specific services and users.