D-Link DGL-4300 - Manual (Page 40)

Using the Configuration Interface
40 D-Link Systems, Inc.
Firewall
A firewall protects your network from the outside world. The D-Link Gaming Router offers a firewall
type functionality. The SPI feature helps prevent cyber attacks. Sometimes you may want a computer
exposed to the outside world for certain types of applications. If you choose to expose a computer,
you cam enable DMZ. DMZ is short for Demilitarized Zone. This option will expose the chosen
computer completely to the outside world.
Firewall Settings
SPI (Stateful Packet Inspection, also known as dynamic packet filtering)
helps to prevent cyber attacks by tracking more state per session. It validates
that the traffic passing through the session conforms to the protocol. When
SPI is enabled, the extra state information will be reported on the Status >
Active sessions page.
If an application has trouble working from behind the router, you can expose
one computer to the Internet and run the application on that computer.
Note: Placing a computer in the DMZ may expose that computer to a variety
of security risks. Use of this option is only recommended as a last resort.
Specify the IP address of the computer on the LAN that you want to have
unrestricted Internet communication. If this computer obtains it’s IP address
automatically using DHCP, be sure to make a static reservation on the
Basic > DHCP page so that the IP address of the DMZ machine does not
change.
After you’ve completed all modifications or deletions, you must click the Save Settings button at the
top of the page to save your changes. The router must reboot before new settings will take effect.
You will be prompted to Reboot the Device or Continue. If you need to make additional settings
changes, click Continue. If you are finished with your configuration settings, click the Reboot the
Device button.
Enable SPI:
Enable DMZ:
DMZ IP Address:
Advanced > Firewall