The DMZ (Demilitarized Zone) provides you with an option to set a single computer on your network outside of the router´s firewall.
Step 1: Open a web browser and type the IP address of the DIR series router into the address bar (default is 192.168.0.1).
Step 2: The default username is admin (all lower case) and the default password is blank (nothing). Click on OK.
Step 3: Click on the Advanced tab at the top and then click on Firewall Settings on the lefthand side.
Step 4: Click the box for EnableHost. Select your computer from the Computer Name list or enter the IP address manually.
Step 5: Click on the Save Settings button to save your settings.