[zorrophreak]

Okay. So when you open a computer up to the internet, there are two main ways it is opened. The most common is basic port forwarding where the router directs all requests on that port to and from that specific local IP address (that specific system). DMZ Host (which is slightly different than true Network DMZ), directs all requests to the router from the public IP address to that one device, unless specific port forwarding is enabled.

Even simpler, DMZ Host is a less secure version of port forwarding as all ports are open for that box. So if you were to use DMZ Host, you would need to make it a priority that you use a dedicated machine (not your personal computer) and to keep all ports closed and ONLY open the ones you would be using. It is also a good idea to enable a true DMZ for this computer and keep it isolated from your network.

Simplest, It opens up that entire machine, and while it isn't too secure, it is the easiest and most direct way. (Assuming you are on a home router)