Firewall Settings - Gemtek WRTB-283N User Manual

A firewall protects your network from the outside world. The Gemtek WRTB-283N 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.
SPI (Stateful Packet Inspection, also known as dynamic packet
Enable SPI:
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:
NAT Endpoint
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.
If an application has trouble working from behind the router,
Enable DMZ Host:
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 automatical y using DHCP, be sure to make
a static reservation on the Basic >
address of the DMZ machine does not change.

Firewall Settings

page so that the IP
DHCP