Section 3 - Configuration

Firewall Settings

A firewall protects your network from the outside world. The D-Link DIR-625 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.

 

Enable SPI: 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.

 

 

NAT Endpoint

Select one of the following for TCP and UDP ports:

 

 

Filtering: Endpoint Independent - Any incoming traffic sent to an open port

 

 

 

will be forwarded to the application that opened the port. The port

 

 

 

will close if idle for 5 minutes.

 

 

 

Address Restricted - Incoming traffic must match the IP address

 

 

 

of the outgoing connection.

 

 

 

Address + Port Restriction - Incoming traffic must match the IP

 

 

 

address and port of the outgoing connection.

 

Enable DMZ Host: 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.

 

 

IP Address: 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.

 

 

 

 

 

D-Link DIR-625 User Manual

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D-Link DIR-625 manual Firewall Settings