D-Link DI-711 - Gateway User manual

D-Link
DI-711
Wireless Broadband Router
User’s Manual
Rev. 07062005

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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

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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

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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

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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

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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.

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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

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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.

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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

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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