I'm just doing it for fun and to see if I can. What is DMZ?
what is a DMZ? hmm,
wikipedia can explain that very thoroughly
In short: it means that you have a special area in your network to and from which traffic from the internet is accepted. For larger organisations this is usually a physical setup like this:
internet --- router --- firewall --- DMZ --- firewall -- internal LAN
the internet is... well the internet... the router accepts connections and routes them (it can usually also filter some traffic as well)... firewall blocks any unwanted stuff (this is also sometimes combined with an antispam solution before mail hits your mailserver)... DMZ is where your mailserver/webserver is located... another firewall (sometimes) for extra security, your LAN can be connected to the 1st firewall as well...
Think of the DMZ as a sort of crumple zone (like in your car)... if a hacker compromises your web/mailserver (car analogy: a truck rams you
) your internal network is still safe (you are still safe in the car, th crumple zone will take the real hit and in the cabin you have airbags popping here and there and you have this cage construction protecting you). You might have some damage, but at least you're still in good enough shape to fix stuff.