D-Link DIR-855 User Manual - Page 48

Firewall Settings

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Section 3 - Configuration Firewall Settings A firewall protects your network from the outside world. The DIR-855 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 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. 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 Basic > DHCP page so that the IP address of the DMZ machine does not change. D-Link DIR-855 User Manual 44

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D-L±nk DIR-855 User Manual
Sect±on ´ - Configurat±on
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.
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.
Enable this feature to protect your network from certain kinds of
“spoofing” attacks.
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.
Enable SPI:
NAT Endpoint
Filtering:
Anti-Spoof Check:
Enable DMZ:
DMZ IP Address:
Firewall Settings
A firewall protects your network from the outside world. The DIR-855 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.