Router DMZ Host

My router has many options in the firmware, but i have no idea what 70% of them mean and do. I just found out about DMZ Host today, and it seems that what it does is forward all port requests to the specified IP address, right?

does that mean that the natural firewall is no longer effective for the DMZ host?

I’m pretty sure it makes you vulnerable. :lol: Bombingpixels could probably lecture you about that.