6

Features & Benefits

continued

±

Access Control supported

Allows you to assign different access rights for different users.

±

Packet filter supported

Packet Filter

allows you to control access to a network by analyzing the

incoming and outgoing packets and letting them pass or halting them

based on the IP address of the source and destination.

±

Virtual Server supported

Enables you to expose WWW, FTP and other services on your LAN to be

accessible to Internet users.

±

User-Definable Application Sensing Tunnel

You can define the attributes, for instance opening special ports to allow

packets to come through, to support special applications requiring multiple

connections, such as Internet gaming, video conferencing, and Internet

telephony. The DI-804HV can sense the application type and open a multi-

port tunnel for it.

±

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 resides on 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 con-

nected 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.

7

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 prevent unauthorized Internet users from

accessing private networks or corporate LAN's and Intranets.

A firewall watches all of the information moving to and from your network and analyzes

each piece of data. Each piece of data is checked against a set of criteria that the

administrator configures. If any data does not meet the criteria, that data is blocked

and discarded. If the data meets the criteria, the data is passed through. This method

is called packet filtering.

A firewall can also run specific security functions based on the type of application or

type of port that is being used. For example, a firewall can be configured to work with

an FTP or Telnet server. Or a firewall can be configured to work with specific UDP or

TCP ports to allow certain applications or games to work properly over the Internet.

Introduction to Local Area Networking

Local Area Networking (LAN) is the term used when connecting several computers

together over a small area such as a building or group of buildings. LAN's can be

connected over large areas. A collection of LAN's connected over a large area is called

a Wide Area Network (WAN).

A LAN consists of multiple computers connected to each other. There are many types

of media that can connect computers together. The most common media is CAT5

cable (UTP or STP twisted pair wire.) Each computer must have a Network Interface

Card (NIC), which communicates the data between computers. A NIC is usually a

10Mbps network card, or 10/100Mbps network card, or a wireless network card.

Wireless Local Area Networks (WLANs) do not use wires; instead they communicate

over radio waves.

Most networks use hardware devices such as hubs or switches that each cable can be

connected to in order to continue the connection between computers. A hub simply

takes any data arriving through each port and forwards the data to all other ports. A

switch is more sophisticated, in that a switch can determine the destination port for a

specific piece of data.

A switch minimizes network traffic overhead and speeds up the

communication over a network.

Networks take some time in order to plan and implement correctly. There are many

ways to configure your network.

You may want to take some time to determine the

best network set-up for your needs.

8

Introduction to Virtual Private Networking

Virtual Private Networking (VPN) uses a publicly wired network (the Internet) to se-

curely connect two different networks as if they were the same network. For example,

an employee can access a corporate network from home using VPN, allowing the

employee to access files, databases, and other networked resources. Here are several

different implementations of VPN that can be used.

Point-to-Point Tunneling Protocol (PPTP)

PPTP uses proprietary means of connecting two private networks over the Internet.

PPTP is a way of securing the information that is communicated between networks.

PPTP secures information by encrypting the data inside of a packet.

IP Security (IPSec)

IPSec provides a more secure network-to-network connection across the Internet or a

Wide Area Network (WAN). IPSec encrypts all communication between the client and

server whereas PPTP only encrypts the data packets.

Both of these VPN implementations are used because there is not a standard for VPN

server software. Because of this, each ISP or business can implement its own VPN

network making interoperability a challenge.

9

LEDS

LED

stands for

L

ight-

E

mitting

D

iode.

The

DI-804HV

has the following LEDs

as described below:

LED

LED Activity

Power

A steady light indicates

a connection to a power source

a power source

M2 LED

Lights up when the device has an Internet

connection

WAN

A solid light indicates connection on the

WAN port.

This LED blinks during data

transmission

COM

A solid light indicates a connection to an

external dial-up analog modem

Flashes once per second to indicate an

active system

LOCAL

NETWORK

(Ports 1-4)

A solid light indicates a connection to an

Ethernet-enabled computer on ports 1-4.

This

LED blinks during data transmission

M1 LED

10

For a typical network setup in a home or small office

(as shown above)

,

please do the following:

4

5

Getting Started

For additional information

about setting up a network,

see:

Networking Basics

Using the Configuration

Menu

Consult with your Cable or DSL provider for proper installation of the modem.

1

3

2

You will need

broadband Internet access (a Cable or DSL subscription line into

your home or office).

Connect the Cable or DSL modem to the DI-804HV wireless broadband router (

see

the Quick Installation Guide included with the DI-804HV.

)

If you are connecting a desktop computer to your network and you need an Ethernet

connection, you can install the D-Link

DFE-530TX+

Ethernet adapter into an

available PCI slot.

(See the Quick Installation Guide included with the DFE-530TX+.)

If you are connecting a laptop computer to your network, install the drivers for the

Ethernet Cardbus adapter (e.g., D-Link DFE-690TXD) into a laptop computer.(See

the Quick Installation Guide included with the DFE-690TXD.)

6

You may connect an analog modem (optional) to function as a backup to the DI-

804HV. To use a backup modem, you must have dial-up service.