D-Link DSL-2640U User manual

D-Link DSL-2640U
Wireless ADSL2/2+ 4-port Ethernet Router
User Manual
Building Networks for People
RECYCLABLE
2006/11/08
Ver. 1.00

1
Table of Contents
.
GENERAL INFORMATION.........................................................................3
Package Contents .......................................................................3
Important Safety Instructions .........................................................3
Front Panel View........................................................................4
Back Panel View.........................................................................5
CONNECTING THE ROUTER TO YOUR COMPUTER.................................................6
Connect the Telephone Cable .....................................................6
Connect the Ethernet Cable .......................................................6
Connect the Power Adapter........................................................6
CONFIGURING THE ROUTER .....................................................................7
HOME ..........................................................................................8
Wizard ....................................................................................8
ATM PVC Configuration..........................................................8
Connection Type ................................................................10
PPP Username and Password ..................................................11
Network Address Translation Settings........................................11
Device Setup.....................................................................12
Wireless ..........................................................................13
Setup - Summary................................................................14
Wireless .................................................................................15
Wireless -- Basic.................................................................15
Wireless – Security..............................................................16
WAN......................................................................................17
LAN.......................................................................................24
DNS.......................................................................................26
DNS Server Configuration ......................................................26
Dynamic DNS............................................................................27
Logout ...................................................................................28
ADVANCED SETUP .............................................................................29
ADSL......................................................................................29
ADSL Settings ....................................................................29
ADSL Tone Settings .............................................................30
Virtual Server...........................................................................31
NAT—Virtual Servers Setup ....................................................31
DMZ ......................................................................................33
SNMP.....................................................................................34
SNMP—Configuration............................................................34
IP Filter..................................................................................34
Incoming IP Filtering Setup ....................................................35
Outgoing IP Filtering Setup ....................................................37
Bridge Filters ...........................................................................39
MAC Filtering Setup.............................................................39
Parental Control........................................................................41
Time of Day Restrictions.......................................................41
Routing ..................................................................................42
Routing--Static Route...........................................................43
Routing—Default Gateway .....................................................44
Routing—RIP Configuration ....................................................46
Quality of Service ......................................................................46
Port Mapping............................................................................48
Certificate...............................................................................50
Local ..............................................................................50
Trusted CA .......................................................................52
Wireless .................................................................................53
Wireless—Advance Setting .....................................................54

2
Wireless—MAC Filter............................................................57
Wireless—Bridge.................................................................58
Wireless—QoS....................................................................59
TOOLS ........................................................................................60
Access Control..........................................................................60
Access Control—Admin .........................................................61
Access Control—Services .......................................................62
Access Control—IP Address.....................................................62
Time .....................................................................................64
Remote Log .............................................................................65
TR-069 Client ...........................................................................66
System...................................................................................68
Save and Reboot.................................................................68
Backup Settings..................................................................68
Update Settings .................................................................69
Restore Default Settings .......................................................69
Firmware ................................................................................71
Test ......................................................................................72
STATUS .......................................................................................74
Device Info..............................................................................74
DHCP Clients............................................................................75
WAN Info ................................................................................76
Route Info...............................................................................76
Log .......................................................................................77
LAN.......................................................................................78
WAN......................................................................................79
ATM ......................................................................................79
ADSL......................................................................................81
ADSL BER Test ...................................................................82
Wireless Station Info...................................................................83

3
General Information
The D-Link DSL-2640U is an ADSL2+ router that provides a convenient wireless
routing function. This user manual offers you with a simple and easy-to-understand
format to install and configure your router.
Package Contents
Included in the package is one of each of the following—
•DSL-2640U Wireless ADSL2/2+ 4-port Ethernet Router
•Power adapter
•RJ-11 telephone cable
•RJ-45 Ethernet cable
•CD-ROM (containing User Manual & Quick Guide)
•Quick Guide (booklet)
•Place your router on a flat surface close to the cables in a location with
sufficient ventilation. Do not mount this device on a wall.
•To prevent overheating, do not obstruct the ventilation openings of this
equipment.
•Plug this equipment into a surge protector to reduce the risk of damage
from power surges and lightning strikes.
•Operate this equipment only from an electrical outlet with the correct
power source as indicated on the adapter.
•Do not open the cover of this equipment. Opening the cover will void any
warranties on the equipment.
•Unplug equipment first before cleaning. A damp cloth can be used to clean
the equipment. Do not use liquid / aerosol cleaners or magnetic / static
cleaning devices.
Important Safety Instructions

4
Front Panel View
LED Mode Indication
Solid Green The router is powered on. (READY)
No light The power is off.
Power Red Failure or device malfunction. (NOT READY)
Status Flashing
Green Traffic is passing through the device. (INTERNET TRAFFIC)
Solid Green DSL is synchronized.
No Light No carrier signal.
Slow Flashing DSL attempting synch. Trying to detect carrier signal.
DSL
Fast Flashing Carrier has been detected and router is trying to train.
Solid Green Wireless is up.
Flashing Wireless traffic is passing through.
WLAN No Light Wireless is down.
Solid Green Powered device connected to associated port
Flashing
Green LAN activity present (traffic in either direction).
LAN 1-4
No Light No activity, router power off, no cable or no powered
device is connected to the LAN port.
Solid Green
IP connected (device has a WAN IP address from IPCP or
DHCP and DSL is up or a static IP address is configured,
PPP negotiation has completed successfully (if used),
and DSL is up. (WAN IP AVAILABLE)
No Light Router power off, router in bridge mode or ADSL
connection not present.
Internet
Red
Device attempted to become IP connected and failed
(no DHCP response, no PPPoE response, PPPoE
authentication failed, no IP address from IPCP, etc.).
(WAN IP NOT AVAILABLE)

5
Back Panel View
Port Description
On/ Off Press to turn the router on and off.
Power Connects to the power adapter.
Reset Press for less than 3 seconds to reset the router.
Press for 3 seconds or more to revert to factory settings.
Console For use by D-Link service personnel for maintenance purposes only.
LAN 4-1 RJ-45 connects the unit to Ethernet devices such as a PC or a switch.
DSL RJ-11 telephone port connects telephone cable to telephone or fax
machine.

6
Connecting the Router to Your Computer
Connect the Telephone Cable
•Connect one end of the telephone cable to the DSL port on the router and
the other end of the cable into the wall socket.
Connect the Ethernet Cable
•Connect one end of the Ethernet cable to one of the 4 LAN ports on the
back of the router and attach the other end to an Ethernet Adapter or
available Ethernet port on your computer. Or, you can attach it to a switch /
hub first and connect your computer to the switch / hub.
Connect the Power Adapter
•Complete the process by connecting the power adapter to the Power input
on the back of the router and then plug the other end of power adapter into a
wall outlet or power strip. Then turn on the router and boot up your PC and
any LAN devices, such as hubs or switches, and any computers connected to
them.
LAN
1-4
On / Off
Button
* Console—
f
or use b
y
D-Link re
p
air service
p
ersonnel onl
y
.
Reset
Button Console *DSL
Port
Power
Input

7
Configuring the Router
To use your web browser to access the web pages used to set up the router, your
computer must be configured to “Obtain an IP address automatically”, that is, you
must change the IP network settings of your computer so that it is a DHCP client. If
you are using Windows XP and do not know how to change your network settings,
skip ahead to Appendix A and read the instructions provided.
Open your web browser and enter
the URL http://192.168.1.1 in the
address bar and press Enter.
Enter “admin” in
the User Name field
and “admin” in the
Password field.
Click
OK
NOTE: Actually, there are two default user name and password combinations. The
user / user name and password combination provides limited access to certain
configurations. The admin / admin combination can perform all functions. Passwords
can be changed at any time.

8
Home
The home section provides configurations for general use, including a Quick Setup
Wizard with steps to quickly set up your router for Internet connection. Also
included in this section are LAN / WAN setup and DNS configuration. The below
sections explains the setup for each.
Wizard
This section will explain how to quickly configure the router if your only intention is
to access the Internet.
ATM PVC Configuration
To enable the auto-connect process, click on the box labeled DSL Auto-connect, a
process that will automatically detect the first usable PVC and automatically detect
PPPoE and PPPoA. To continue, click on the Next button.
Skip ahead to page 11 if you select DSL Auto-connect.
If you uncheck the DSL Auto-connect box, the resulting screen is seen below. Enter
the VPI / VCI as indicated by your ISP. Also shown will be the Quality of Service.

9

10
Connection Type
Following is the Connection Type screen where you select the type of network
protocol and encapsulation mode over the ATM PVC that your ISP has instructed you
to use.
The following is a PPPoA example. Click on Next to continue.

11
PPP Username and Password
Now, enter the PPP username and password as given by your ISP. Then decide if
you will be using any features such as Dial on demand, PPP IP extension, Keep Alive
and then click on Next.
Network Address Translation Settings
The next step is to configure the Network Address Translation (NAT) settings. For
the example, NAT will be enabled. The remaining fields are left as default and
then click on Next to continue.

12
Device Setup
You can configure the DSL Router IP address and Subnet Mask for the LAN interface
to correspond to your LAN’s IP Subnet. If you want the DHCP server to
automatically assign IP addresses, then enable the DHCP server and enter the range
of IP addresses that the DHCP server can assign to your computers. Disable the
DHCP server if you would like to manually assign IP addresses. Click on Next to
continue.

13
Wireless
The router’s wireless function can be enabled on the following screen. If the
function is enabled, then continue by entering the SSID, the wireless network name.
Click on Next to continue.

14
Setup - Summary
After all of the configurations are done, the WAN Setup Summary screen displays all
WAN settings that you have made. Check that the settings are correct before
clicking on the Save / Reboot button. Clicking on Save / Reboot will save your
settings and restart your router.

15
Wireless
Wireless -- Basic
The below Wireless – Basic screen lets you enable or disable wireless. The default
setting for wireless is enabled. You can also hide the access point so others cannot
see your ID on the network. Click on Apply to save your configurations before
clicking on Security to continue to the Security configurations.

16
Wireless – Security
The next screen is the Wireless – Security screen which allows you to select the
network authentication method and to enable or disable WEP encryption. Note
that depending on the network authentication that is selected, the screen will
change accordingly so additional fields can be configured for the specific
authentication method.
Network authentication methods include the following—
•Open—anyone can access the network. The default is a disabled WEP
encryption setting.
•Shared—WEP encryption is enabled and encryption key strength of 64-bit or
128-bit needs to be selected. Click on Set Encryption Keys to manually set
the network encryption keys. Up to 4 different keys can be set and you can
come back to select which one to use at anytime.
•802.1X—requires mutual authentication between a client station and the
router by including a RADIUS-based authentication server. Information
about the RADIUS server such as its IP address, port and key must be
entered. WEP encryption is also enabled and the encryption strength must
also be selected.
•WPA—(Wi-Fi Protected Access)— usually used for the larger Enterprise
environment, it uses a RADIUS server and TKIP (Temporal Key Integrity
Protocol) encryption (instead of WEP encryption which is disabled). TKIP
uses128-bit dynamic session keys (per user, per session, and per packet
keys).
•WPA-PSK (Wi-Fi Protected Access – Pre-Shared Key)—WPA for home and
SOHO environments also using the same strong TKIP encryption, per-packet
key construction, and key management that WPA provides in the enterprise
environment. The main difference is that the password is entered manually.
A group re-key interval time is also required.
•WPA2 (Wi-Fi Protected Access 2)—second generation of WPA which uses
AES (Advanced Encryption Standard) instead of TKIP as its encryption
method. Network re-auth interval is the time in which another key needs
to be dynamically issued.
•WPA2-PSK (Wi-Fi Protected Access 2 – Pre-Shared Key)—suitable for home
and SOHO environments, it also uses AES encryption and requires you to
enter a password and an re-key interval time.
•Mixed WPA2 / WPA—during transitional times for upgrades in the
enterprise environment, this mixed authentication method allows
“upgraded” and users not yet “upgraded” to access the network via the
router. RADIUS server information must be entered for WPA and a as well
as a group re-key interval time. Both TKIP and AES are used.
•Mixed WPA2 / WPA-PSK—useful during transitional times for upgrades in
the home or SOHO environment, a pre-shared key must be entered along
with the group re-key interval time. Both TKIP and AES are also used.

17
WAN
Configure the WAN settings as provided by your ISP.
Click on the Add button if you want to add a new connection for the WAN interface
and to proceed to the ATM PVC Configuration screen as seen below. The ATM PVC
Configuration screen allows you to configure an ATM PVC identifier (VPI and VCI)
and select a service category.

18
Find out the following values from your ISP before you change them.
•VPI:Virtual Path Identifier. The valid range is 0 to 255.
•VCI: Virtual Channel Identifier. The valid range is 32 to 65535.
•Service Category:Five classes of traffic are listed—
oUBR Without PCR (Unspecified Bit Rate without Peak Cell Rate)—
UBR service is suitable for applications that can tolerate variable
delays and some cell losses. Applications suitable for UBR service
include text/data/image transfer, messaging, distribution, and
retrieval and also for remote terminal applications such as
telecommuting.
oUBR With PCR (Unspecified Bit Rate with Peak Cell Rate)--
oCBR (Constant Bit Rate)—used by applications that require a fixed
data rate that is continuously available during the connection time.
It is commonly used for uncompressed audio and video information
such as videoconferencing, interactive audio (telephony), audio /
video distribution (e.g. television, distance learning, and pay-per-
view), and audio / video retrieval (e.g. video-on-demand and audio
library).
oNon Realtime VBR (Non-Real-time Variable Bit Rate)—can be used
for data transfers that have critical response-time requirements
such as airline reservations, banking transactions, and process
monitoring.
oRealtime VBR (Real-time Variable Bit Rate)—used by time-sensitive
applications such as real-time video. Rt-VBR service allows the
network more flexibility than CBR.
•Quality of Service:Can be enabled only for UBR without PCR, UBR with
PCR, and Non Realtime VPR.

19
The following screen shows the below types of network protocols and encapsulation
modes—
•PPP over ATM (PPPoA)
•PPP over Ethernet (PPPoE)
•MAC Encapsulation Routing (MER)
•IP over ATM (IpoA)
•Bridging
If you will be using VLAN tagging, then click on the Enable 802.1q checkbox and
then enter the VLAN ID number. Note that the 802.1q function is only available
if you select PPPoE, MER, or Bridging. When finished with your selections, click
on Next to continue.