D-Link DI-711 - Gateway Manuale utente

D-Link

DI-711

Wireless Broadband Router

User’s Manual

Rev. 07062005

Contents

Introduction ................................................................................................4

Package Contents .....................................................................................5

Introduction to Broadband Router Technology........................................6

Introduction to Firewalls..........................................................................6

Introduction to Local Area Networking ...................................................7

Introduction to Virtual Private Networking..............................................8

Introduction to Wireless Networking.......................................................9

Hardware Installation..............................................................................11

Placement ...............................................................................................11

Safety Precautions..................................................................................11

Side Panel...............................................................................................11

Front Panel .............................................................................................12

Rear Panel...............................................................................................12

Basic DI-711 Configuration & Main Page .............................................13

Start-up and Log in.................................................................................13

Main Page...............................................................................................15

Setup Wizard ..........................................................................................15

Device Information.................................................................................16

Device Status..........................................................................................17

Basic Setup.............................................................................................18

Advanced Settings ....................................................................................21

DHCP Server Settings............................................................................21

Virtual Server Settings............................................................................22

DMZ...................................................................................................22

Static Routing.........................................................................................24

Dynamic Settings ...................................................................................25

Modem String Settings...........................................................................26

System Tools..............................................................................................27

Intruder Detection Log...........................................................................27

Display Routing Table............................................................................28

System Diagnostics ................................................................................30

Load Default Settings.............................................................................31

Upgrade Firmware..................................................................................32

Reset Device...........................................................................................33

Troubleshooting........................................................................................34

Basic Functions ......................................................................................34

LAN Connection Problems....................................................................36

ISP Connection Problems.......................................................................38

Internet Application Problems................................................................39

Wireless Troubleshooting.......................................................................41

Performing a Factory Reset....................................................................42

Using the PING Utility in Windows 95/98/Me......................................43

Using the WINIPCFG Utility in Windows 95/98/Me............................45

Technical Specifications...........................................................................47

D-Link Offices...........................................................................................49

Limited Warranty.....................................................................................50

Registration Card................................................................................59

Introduction

Congratulations on your purchases of the D-Link Wireless Broadband

Router. Your Wireless Broadband Router enables you to share your DSL or

Cable Internet connection with computers on your network. This guide will

explain the features and functions of the Wireless Broadband Router to

help you get the most out of your Internet experience.

D-Link’s Wireless Broadband Router allows LAN users to share a

single Internet Connection while providing the safety and security of port

blocking, packet filtering, and a natural firewall. Static address support,

integrated DHCP, PPPoE, and device name support will allow it to connect

to nearly any broadband provider whether Cable or DSL based, and at the

same time simplify local area network settings.

The Wireless Broadband Router provides two levels of security

support. First, it masks local users’IP addresses from others on the Internet

making it much more difficult for a hacker to target a machine on your

network. Secondly, it can block and redirect certain ports to limit the

services that outside users can access. Specific ports can be opened to

ensure that games and other Internet applications will run properly.

The Broadband Router provides special pass through support for

common VPN implementations. The Virtual Server feature allows you to

expose HTTP, FTP, Game Servers and other local services to be accessible

to Internet users located outside of the LAN. The User-Definable

Application Sensing Tunnel feature allows you to define the attributes to

support special applications requiring multiple connections, such as

Internet gaming, video conferencing, and Internet telephony. A DMZ

setting can be applied to a single client behind the Broadband Router to

expose it to the Internet and ensure complete Internet application

compatibility even if specific ports are not known.

Unlike proxy server or NAT software that requires the software server

to remain visible on the Internet, no local computers are directly externally

visible when using the Broadband Router.Also the Broadband Router, like

broadband, is always on, removing the need to constantly boot a software

server when access is desired from a client.

Integrated DHCP services allow up to 252 users to get their IP address

automatically on boot up from the Broadband Router. Client machines

require no software, simply set them to accept a dynamically assigned IP

address and reboot. Each time they are powered up the Broadband Router

will recognize them and set their IP address to instantly connect them to

the LAN.

Package Contents

The D-Link DI-711 package should include the following items.

 DI-711 Broadband router

 User’s Manual

 Quick Install Guide

 Power Adapter

 CAT-5 UTP Cable

Introduction to Broadband Router Technology

A router is a device that forwards data packets from a source to a

destination. Routers work on OSI layer 3, which forwards data packets

using an 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 behind 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

prevent unauthorized Internet users from accessing private networks such

as 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 WideArea 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. On the other

hand, wireless networks do not use wires; instead they communicate over

radio waves. Each computer must have a Network Interface Card (NIC),

which communicates the data between computers. A NIC is usually a

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

card.

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 port that each piece of data is supposed to be

delivered to. A switch minimizes network traffic and speeds up the

communication over a network.

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

There are many types of scenarios to consider which could affect the

operability of a network.

Introduction to Virtual Private Networking

Virtual Private Networking (VPN) uses a publicly wired network (the

Internet) to securely connect two different networks as if they were the

same network. For example, an employee can access the corporate network

from home using VPN, allowing the employee to access files and printers.

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.

IPSecurity (IPSec)

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

Internet or a WideArea 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 their own VPN network making interoperability a

challenge.

Introduction to Wireless Networking

D-Link wireless products are based on industry standards to provide

easy to use and compatible high-speed wireless connectivity within your

home or business. Strictly adhering to IEEE 802.11b the D-Link wireless

family of products will allow you to access the data you want, when and

where you want it. No longer will you be tethered to a workstation or

forced to run new wiring. You will be able to enjoy the freedom that

wireless networking delivers.

Standards Based Technology

Based on IEEE 802.11b, D-Link Air products can throughput data up

to 11 Megabits per second. This means you will be able to transfer large

files quickly or even watch a Movie in MPEG format over your network

without noticeable delays. This technology works by using multiple

frequencies in the 2.4GHz range utilizing Direct Sequence Spread

Spectrum (DSSS) technology. D-Link Air products will automatically

sense the best possible connection speed to ensure the greatest speed and

range possible with the technology.

Installation Considerations

Designed to go up to 100 meters indoors and up to 300 meters

outdoors, D-Link Air lets you access your network from anywhere you

want. Keep in mind, however, that the number of walls, ceilings or other

objects that the wireless signals must pass thru will limit range. Typical

ranges vary depending on the types of materials and background RF noise

in your home or business. The key to maximizing range is to follow these

basic principles:

1. Keep the number of walls and ceilings to a minimum - Each wall or

ceiling can reduce your D-Link Air Wireless products range from 1-30

meters. Position your Access Points, Residential Gateways, and

Computers so that the number of walls or ceilings is minimized.

2. Be aware of the direct line between Access Points, Residential

Gateways, and Computers - A wall that is .5 meter thick, at a 45 degree

angle appears to be almost 1 meter thick.At a 2 degree angle it looks

over 14 meters thick! Try to make sure that the AP and Adapters are

positioned so that the signal will travel straight through a wall or

ceiling for better reception.

3. Building Materials make a difference - A solid metal door or aluminum

studs may have a negative effect on range. Again, try to position

Access Points, Residential Gateways, and Computers so that the signal

passes through drywall or open doorways and not other materials.

4. Make sure that the antenna is positioned for best reception by using the

software signal strength tools included with your product.

5. Keep your product away (at least 1-2 meters) from electrical devices

that generate RF noise, like microwaves, Monitors, electric motors, etc.

For the average American 4-bedroom home, range should not be a

problem. If you experience low or no signal strength in areas of your

home that you wish to access, consider positioning theAccess Point in

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