D-Link DIR-840 User manual

User Manual
Wireless N600 VPN Router
DIR840
Version 1.0 | 07/02/2012

iD-Link DIR-840 User Manual
D-Link reserves the right to revise this publication and to make changes in the content hereof without obligation to notify any
person or organization of such revisions or changes.
Manual Revisions
Trademarks
D-Link and the D-Link logo are trademarks or registered trademarks of D-Link Corporation or its subsidiaries in the United
States or other countries. All other company or product names mentioned herein are trademarks or registered trademarks of
their respective companies.
Copyright © 2012 by D-Link Systems, Inc.
All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed written permission
from D-Link Systems, Inc.
Revision Date Description
1.0 July 02, 2012 • Initial release
Preface

iiD-Link DIR-840 User Manual
Table of Contents
Preface ................................................................................. i
Manual Revisions ........................................................................... i
Trademarks ...................................................................................... i
Product Overview .............................................................. 1
Package Contents ......................................................................... 1
System Requirements ................................................................. 2
Introduction ................................................................................... 3
Features ............................................................................................ 4
Hardware Overview ..................................................................... 5
Connections ...........................................................................5
LEDs ...........................................................................................6
Installation ......................................................................... 7
Before you Begin ........................................................................... 7
Wireless Installation Considerations ...................................... 8
Manual Setup .................................................................................9
Connect to an Existing Router ...............................................11
Conguration ...................................................................13
Web-based Conguration Utility ..........................................13
Internet Connection Setup .....................................................14
Static (assigned by ISP) .....................................................15
Dynamic (Cable) ..................................................................16
PPPoE (DSL) ...........................................................................17
PPTP .........................................................................................18
L2TP .........................................................................................20
Multi-SSID ......................................................................................22
Network Settings ........................................................................24
Router Settings ....................................................................24
DHCP Server Settings ........................................................25
VPN Settings .................................................................................26
IPSec Settings .......................................................................27
L2TP Settings ........................................................................29
Advanced Network Settings ...................................................30
Tools ..................................................................................31
Admin .............................................................................................31
Time .................................................................................................32
SysLog .............................................................................................33
System ............................................................................................34
Firmware ........................................................................................35
Dynamic DNS ...............................................................................36
System Check ...............................................................................37
Status ................................................................................38
Device Info ....................................................................................38
Log ...................................................................................................39
Statistics .........................................................................................40
Wireless ..........................................................................................41
VPN ..................................................................................................42
Troubleshooting ..............................................................43
Wireless Basics .................................................................47
What is Wireless? .........................................................................48
Table of Contents

iiiD-Link DIR-840 User Manual
Table of Contents
Tips ...................................................................................................50
Wireless Modes ............................................................................51
Networking Basics ...........................................................52
Check your IP address ...............................................................52
Statically Assign an IP address ...............................................53
Technical Specications ..................................................54
GPL Code Statement........................................................55
Safety Statements ...........................................................68

1D-Link DIR-840 User Manual
Section 1 - Product Overview
Product Overview
Package Contents
Note: Using a power supply with a dierent voltage rating than the one included with the DIR-840 will cause damage and void the warranty
for this product.
If any of the above items are missing, please contact your reseller.
DIR-840 Wireless N600 VPN Router
Ethernet Cable
Two Detachable Antennas
Power Adapter

2D-Link DIR-840 User Manual
Section 1 - Product Overview
Network Requirements
• An Ethernet-based Cable or DSL modem
• IEEE 802.11n or 802.11g wireless clients
• IEEE 802.11a wireless clients
• 10/100/1000 Ethernet
Web-based Conguration
Utility Requirements
Computer with the following:
• Windows®, Macintosh, or Linux-based operating system
• An installed Ethernet adapter
Browser Requirements:
• Internet Explorer 6 or higher
• Firefox 3.0 or higher
• Safari 3.0 or higher
• Chrome 2.0 or higher
Windows® Users: Make sure you have the latest version of Java
installed. Visit www.java.com to download the latest version.
System Requirements

3D-Link DIR-840 User Manual
Section 1 - Product Overview
Introduction
TOTAL PERFORMANCE
Combines award winning router features and IEEE 802.11a/g/n wireless technology to provide the best wireless performance.
TOTAL SECURITY
The most complete set of security features including Active Firewall and WPA/WPA2 to protect your network against outside intruders.
TOTAL COVERAGE
Provides greater wireless signal rates even at farther distances for best-in-class Whole Home Coverage.
ULTIMATE PERFORMANCE
The D-Link Wireless N600 VPN Router (DIR-840) is a 802.11n/802.11a compliant device that delivers real world performance of up to 14x
faster than an 802.11g wireless connection (also faster than a 100Mbps wired Ethernet connection). Create a secure wireless network
to share photos, les, music, video, printers, and network storage throughout your home. Connect the DIR-840 router to a cable or DSL
modem and share your high-speed Internet access with everyone on the network. In addition, this Router includes a Quality of Service
(QoS) engine that keeps digital phone calls (VoIP) and online gaming smooth and responsive, providing a better Internet experience.
EXTENDED WHOLE HOME COVERAGE
Powered by Wireless N technology, this high performance router provides superior Whole Home Coverage while reducing dead spots.
The router is designed for use in bigger homes and for users who demand higher performance networking. Add a Wireless N notebook
or desktop adapter and stay connected to your network from virtually anywhere in your home.
TOTAL NETWORK SECURITY
The Wireless N router supports all of the latest wireless security features to prevent unauthorized access, be it from over the wireless
network or from the Internet. Support for WPA/WPA2 standards ensure that you’ll be able to use the best possible encryption method,
regardless of your client devices. In addition, this router utilizes dual active rewalls (SPI and NAT) to prevent potential attacks from
across the Internet.
* Maximum wireless signal rate derived from IEEE Standard 802.11a, 802.11g and 802.11n specications. Actual data throughput will vary. Network conditions and environmental
factors, including volume of network trac, building materials and construction, and network overhead, lower actual data throughput rate. Environmental conditions will
adversely aect wireless signal range.

4D-Link DIR-840 User Manual
Section 1 - Product Overview
• Faster Wireless Networking - The DIR-840 provides up to 300Mbps* wireless connection with other 802.11n
wireless clients. This capability allows users to participate in real-time activities online, such as video streaming,
online gaming, and real-time audio. The performance of this 802.11n wireless router gives you the freedom of
wireless networking at speeds 14x faster than 802.11g.
• Compatible with 802.11a/g Devices - The DIR-840 is still fully compatible with the IEEE 802.11g and 802.11a
standards, so it can connect with existing 802.11g and 802.11a PCI, USB, and Cardbus adapters.
• Advanced Firewall Features - The Web-based user interface displays a number of advanced network
management features including:
• Secure Multiple/Concurrent Sessions - The DIR-840 can pass through VPN sessions. It supports
multiple and concurrent IPSec and PPTP sessions, so users behind the DIR-840 can securely access
corporate networks.
• User-friendly Setup Wizard - Through its easy-to-use Web-based user interface, the DIR-840 lets you control what
information is accessible to those on the wireless network, whether from the Internet or from your company’s
server. Congure your router to your specic settings within minutes.
* Maximum wireless signal rate derived from IEEE Standard 802.11g, 802.11a, and 802.11n specications. Actual data throughput will vary. Network conditions and environmental
factors, including volume of network trac, building materials and construction, and network overhead, lower actual data throughput rate. Environmental conditions will
adversely aect wireless signal range.
Features

5D-Link DIR-840 User Manual
Section 1 - Product Overview
Hardware Overview
Connections
1Reset Button Pressing the Reset button restores the router to its original factory default settings.
2LAN Ports (1-4) Connect 10/100/1000 Ethernet devices such as computers, switches, and NAS.
3Internet Port The auto MDI/MDIX Internet port is the connection for the Ethernet cable to the cable or DSL modem.
4Power Receptor Receptor for the supplied power adapter.
1 2 43

6D-Link DIR-840 User Manual
Section 1 - Product Overview
Hardware Overview
LEDs
1Power LED A solid light indicates a proper connection to the power supply.
2Internet LED A solid light indicates connection on the Internet port. This LED blinks during data transmission.
3WLAN LED (2.4GHz) A solid light indicates that the 2.4GHz wireless segment is ready. This LED blinks during wireless data
transmission.
4WLAN LED (5GHz) A solid light indicates that the 5GHz wireless segment is ready. This LED blinks during wireless data
transmission.
5LAN LEDs (1-4) A solid light indicates a connection to an Ethernet-enabled computer on ports 1-4. This LED blinks during
data transmission.
1 2 3 4 5

7D-Link DIR-840 User Manual
Section 2 - Installation
Before you Begin
Installation
This section will walk you through the installation process. Placement of the router is very important. Do not place the router
in an enclosed area such as a closet, cabinet, or in the attic or garage.
• Please congure the router with the computer that was last connected directly to your modem.
• You can only use the Ethernet port on your modem. If you were using the USB connection before using the router,
then you must turn o your modem, disconnect the USB cable and connect an Ethernet cable to the Internet port
on the router, and then turn the modem back on. In some cases, you may need to call your ISP to change connection
types (USB to Ethernet).
• If you have DSL and are connecting via PPPoE, make sure you disable or uninstall any PPPoE software such as WinPoet,
Broadjump, or Enternet 300 from your computer or you will not be able to connect to the Internet.

8D-Link DIR-840 User Manual
Section 2 - Installation
Wireless Installation Considerations
The D-Link wireless router lets you access your network using a wireless connection from virtually anywhere within the
operating range of your wireless network. Keep in mind, however, that the number, thickness and location of walls, ceilings,
or other objects that the wireless signals must pass through, may limit the range. Typical ranges vary depending on the types
of materials and background RF (radio frequency) noise in your home or business. The key to maximizing wireless range is to
follow these basic guidelines:
1. Keep the number of walls and ceilings between the D-Link router and other network devices to a minimum -
each wall or ceiling can reduce your adapter’s range from 3-90 feet (1-30 meters.) Position your devices so that
the number of walls or ceilings is minimized.
2. Be aware of the direct line between network devices. A wall that is 1.5 feet thick (.5 meters), at a 45-degree angle
appears to be almost 3 feet (1 meter) thick. At a 2-degree angle it looks over 42 feet (14 meters) thick! Position
devices so that the signal will travel straight through a wall or ceiling (instead of at an angle) for better reception.
3. Building Materials make a dierence. A solid metal door or aluminum studs may have a negative eect on range.
Try to position access points, wireless routers, and computers so that the signal passes through drywall or open
doorways. Materials and objects such as glass, steel, metal, walls with insulation, water (sh tanks), mirrors, le
cabinets, brick, and concrete will degrade your wireless signal.
4. Keep your product away (at least 3-6 feet or 1-2 meters) from electrical devices or appliances that generate RF
noise.
5. If you are using 2.4GHz cordless phones or X-10 (wireless products such as ceiling fans, lights, and home security
systems), your wireless connection may degrade dramatically or drop completely. Make sure your 2.4GHz phone
base is as far away from your wireless devices as possible. The base transmits a signal even if the phone in not
in use.

9D-Link DIR-840 User Manual
Section 2 - Installation
1. Turn o and unplug your cable or DSL broadband modem. This is required.
Manual Setup
2. Position your router close to your modem and a computer. Place the router in an open area of your intended
work area for better wireless coverage.
3. Unplug the Ethernet cable from your modem (or existing router if upgrading) that is connected to your computer.
Plug it into the blue port labeled 1 on the back of your router. The router is now connected to your computer.
Modem
DIR-840
Computer

10D-Link DIR-840 User Manual
Section 2 - Installation
4. Plug one end of the included blue Ethernet cable that came with your router into the yellow port labeled
INTERNET on the back of the router. Plug the other end of this cable into the Ethernet port on your modem.
5. Reconnect the power adapter to your cable or DSL broadband modem and wait for two minutes.
6. Connect the supplied power adapter into the power port on the back of the router and then plug it into a power
outlet or surge protector. Press the power button and verify that the power LED is lit. Allow 1 minute for the
router to boot up.
7. If you are connecting to a Broadband service that uses a dynamic connection (not PPPoE), you may be online
already. Try opening a web browser and enter a web site. If you connect, you are nished with your Internet setup.
Please skip to page 13 to congure your router and use the manual setup procedure to congure your network
and wireless settings. If you did not connect to the Internet, use the D-Link Setup Wizard (refer to page 15).
DIR-840
DIR-840
Modem

11D-Link DIR-840 User Manual
Section 2 - Installation
Note: It is strongly recommended to replace your existing router with the DIR-840 instead of using both. If your modem is a combo
router, you may want to contact your ISP or manufacturer’s user guide to put the router into Bridge mode, which will ‘turn o’ the
router (NAT) functions.
If you are connecting the DIR-840 router to an existing router to use as a wireless access point and/or switch, you will have to
do the following to the DIR-840 before connecting it to your network:
• Disable UPnP™
• Disable DHCP
• Change the LAN IP address to an available address on your network. The LAN ports on the router cannot accept
a DHCP address from your other router.
To connect to another router, please follow the steps below:
1. Plug the power into the router. Connect one of your computers to the router (LAN port) using an Ethernet cable. Make sure
your IP address on the computer is 192.168.0.xxx (where xxx is between 2 and 254). Please see the Networking Basics
section for more information. If you need to change the settings, write down your existing settings before making any
changes. In most cases, your computer should be set to receive an IP address automatically in which case you will not have
to do anything to your computer.
2. Open a web browser, enter http://192.168.89.1 and press Enter. When the login window appears, set the user name to
Admin and the password to nwtitfbipne. Click Log In to continue.
3. Click on Advanced and then click Advanced Network. Uncheck the Enable UPnP checkbox. Click Save Settings to continue.
4. Click Setup and then click Network Settings. Uncheck the Enable DHCP Server checkbox. Click Save Settings to continue.
Connect to an Existing Router

12D-Link DIR-840 User Manual
Section 2 - Installation
5. Under Router Settings, enter an available IP address and the subnet mask of your network. Click Save Settings to save your
settings. Use this new IP address to access the conguration utility of the router in the future. Close the browser and change
your computer’s IP settings back to the original values as in Step 1.
6. Disconnect the Ethernet cable from the router and reconnect your computer to your network.
7. Connect an Ethernet cable in one of the LAN ports of the router and connect it to your other router. Do not plug anything
into the Internet (WAN) port of the D-Link router.
8. You may now use the other 3 LAN ports to connect other Ethernet devices and computers. To congure your wireless network,
open a web browser and enter the IP address you assigned to the router. Refer to the Conguration and Wireless Security
sections for more information on setting up your wireless network.
Laptop
Computer
DIR-840
Existing Router Modem
Internet

13D-Link DIR-840 User Manual
Section 3 - Conguration
Web-based Conguration Utility
Select Admin from the drop-down menu and then enter the password
nwtitfbipne.
To access the conguration utility, open a web-browser such as Internet
Explorer and enter the IP address of the router (http://192.168.89.1).
Conguration

14D-Link DIR-840 User Manual
Section 3 - Conguration
Internet Connection Setup
Use this tab to choose either Static IP, DHCP, PPPoE, PPTP, or
L2TP to congure your Internet connection. You may need to
get this information from your ISP (Internet Service Provider).

15D-Link DIR-840 User Manual
Section 3 - Conguration
Select Static IP to manually enter the IP settings supplied by
your ISP.
Enter the IP address assigned by your ISP.
Enter the Subnet Mask assigned by your ISP.
Enter the Gateway assigned by your ISP.
The DNS server information will be supplied by your ISP (Internet
Service Provider.)
Maximum Transmission Unit - you may need to change the MTU
for optimal performance with your specic ISP. 1500 is the default
MTU.
The default MAC Address is set to the Internet port’s physical
interface MAC address on the Broadband Router. It is not
recommended that you change the default MAC address unless
required by your ISP. You can use the Copy Your PC’s MAC Address
button to replace the Internet port’s MAC address with the MAC
address of your Ethernet card.
My Internet Connection:
IP Address:
Subnet Mask:
Default Gateway:
DNS Servers:
MTU:
MAC Address:
Static (assigned by ISP)
Select Static IP Address if all the Internet port’s IP information is provided to you by your ISP. You will need to enter in the IP address, subnet mask,
gateway address, and DNS address(es) provided to you by your ISP. Each IP address entered in the elds must be in the appropriate IP form, which
are four octets separated by a dot (x.x.x.x). The Router will not accept the IP address if it is not in this format.

16D-Link DIR-840 User Manual
Section 3 - Conguration
Select Dynamic IP (DHCP) to obtain IP Address information
automatically from your ISP. Select this option if your ISP does not give
you any IP numbers to use. This option is commonly used for cable
modem services.
The Host Name is optional but may be required by some ISPs. Leave
blank if you are not sure.
Enter the Primary and secondary DNS server IP addresses assigned by
your ISP. These addresses are usually obtained automatically from your
ISP. Leave at 0.0.0.0 if you did not specically receive these from your ISP.
Maximum Transmission Unit - you may need to change the MTU for
optimal performance with your specic ISP. 1500 is the default MTU.
The default MAC Address is set to the Internet port’s physical interface MAC address on the Broadband Router. It is not recommended
that you change the default MAC address unless required by your ISP. You can use the Copy Your PC’s MAC Address button to
replace the Internet port’s MAC address with the MAC address of your Ethernet card.
My Internet
Connection:
Host Name:
Primary/Secondary
DNS Server:
MTU:
MAC Address:
Dynamic (Cable)