D-Link DI-713P Manuale utente

D-Link

DI-713P

Wireless Broadband Router

User’s Manual

Contents

Contents… ....................................................................................................2

Chapter 1 -Getting Started...........................................................................4

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

Introduction to Firewalls..........................................................................7

Introduction to Local Area Networking ...................................................8

Introduction to Virtual Private Networking..............................................9

Introduction to Wireless Networking .....................................................10

Chapter 2 -Hardware Installation ..............................................................12

Procedure for Hardware Installation ......................................................12

Package Contents ...................................................................................14

LED Panel ..............................................................................................15

Rear Panel...............................................................................................16

Chapter 3 -Basic Broadband Router Configuration..................................17

Start-up and Log in.................................................................................17

Device Information.................................................................................19

Useful Tools............................................................................................20

Setup .......................................................................................................24

Static IP Address.....................................................................................25

Dynamic IP Address...............................................................................26

PPP over Ethernet...................................................................................27

Dial-up Network.....................................................................................29

DHCP .....................................................................................................31

Wireless..................................................................................................33

Print Server.............................................................................................34

Chapter 4 -Advanced Broadband Router Configuration ...........................35

Virtual Server .........................................................................................37

Special Applications ...............................................................................40

Access Control .......................................................................................43

Wireless..................................................................................................46

Miscellaneous Items ...............................................................................48

DMZ Host...............................................................................................48

Remote Administrator Host....................................................................49

Non-Standard FTP Port ..........................................................................49

Chapter 5 -Console Mode..........................................................................51

Chapter 6 -Troubleshooting.......................................................................53

Basic Functions ......................................................................................53

LAN Connection Problems ....................................................................55

ISP Connection Problems .......................................................................57

Internet Application Problems ................................................................58

Wireless Troubleshooting.......................................................................60

Appendix 1 -Using PING..........................................................................61

Appendix 2 -Using WINIPCFG................................................................63

Contacting Technical Support ....................................................................67

Technical Specifications.............................................................................68

D-Link Offices............................................................................................70

Limited Warranty........................................................................................71

Registration Card........................................................................................79

Rev. 2001-03-15

Chapter 1 -Getting Started

Thank you for purchasing the D-Link Broadband Router. Your

Broadband Router enables you to share your DSL or Cable Internet

connection with computers on your wired or wireless network. This guide

will explain the features and functions of the Broadband Router to help you

get the most out of your Internet experience.

D-Link’s Wireless Broadband Router allows wireless 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 by the

user to ensure that games and other Internet applications will run properly.

The Wireless 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 the user 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

Wireless 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 Wireless Broadband Router. Also the Wireless

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 Wireless 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

Wireless Broadband Router will recognize them and set their IP address to

instantly connect them to the LAN

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 shouldn’t be there. This provides security

for the computers behind your router because computers from the outside

can’t 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 isn’t 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 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. Wireless

networks don’t 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. Some of these issues are discussed in this manual

under the Networking Basics section.

Introduction to Virtual Private Networking

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

Internet) to 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.

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 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:

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