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Virtual Server supported
Enables you to expose WWW, FTP and other services on your LAN
to be accessible to Internet users.
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User-Definable Application Sensing Tunnel
User can define the attributes to support special applications
requiring multiple connections, like Internet gaming, video
conferencing, Internet telephony and so on.
The DI-604 can sense
the application type and open a multi-port tunnel for it.
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DMZ Host supported
Allows a networked computer to be fully exposed to the Internet; this
function is used when the special “application-sensing tunnel
feature” is insufficient to allow an application to function correctly.
Introduction to Broadband Router
Technology
A router is a device that forwards data packets from a source to a
destination. Routers forward data packets using IP addresses and not a
MAC address. A router will forward data from the Internet to a particular
computer on your LAN.
The information that makes up the Internet gets moved around using
routers. When you click on a link on a web page, you send a request to a
server to show you the next page. The information that is sent and received
from your computer is moved from your computer to the server using routers.
A router also determines the best route that your information should follow to
ensure that the information is delivered properly.
A router controls the amount of data that is sent through your network
by eliminating information that should not be there. This provides security for
the computers connected to your router, because computers from the
outside cannot access or send information directly to any computer on your
network. The router determines which computer the information should be
forwarded to and sends it. If the information is not intended for any computer
on your network, the data is discarded. This keeps any unwanted or harmful
information from accessing or damaging your network.
Introduction to Firewalls
A firewall is a device that sits between your computer and the Internet
that prevents unauthorized access to or from your network. A firewall can be
a computer using firewall software or a special piece of hardware built
specifically to act as a firewall. In most circumstances, a firewall is used to
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