Aug 04

1.D-LINK DIR-825 Firewall Settings

A firewall protects your network from the outside world. The D-Link DIR-825 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 can 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 Filtering:

Select one of the following for TCP and UDP ports:
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.

● Anti-Spoof Check:

Enable this feature to protect your network from certain kinds of “spoofing” attacks.

● Enable DMZ:

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.

● DMZ 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 Setup > Network Settings page so that the IP address of the DMZ machine does not change.

2.D-LINK DIR-825 Routing configuration

The Routing option is an advanced method of customizing specific routes of data through your network.


Destination IP:Enter the IP address of packets that will take this route.

Netmask:Enter the netmask of the route, please note that the octets must match your destination IP address.

Gateway:Enter your next hop gateway to be taken if this route is used.

Metric:The route metric is a value from 1 to 16 that indicates the cost of using this route. A value 1 is the lowest cost and 15 is the highest cost.

Interface:Select the interface that the IP packet must use to transit out of the router when this route is used.

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  • At 2019.06.06 07:33, Himanshu Verma said:

    I want firewall for Dlink dir-825 router which have following features-
    Domain blocking

    • At 2019.06.06 07:38, Himanshu Verma said:

      where can i get this firewall

      (Required, will not be published)