D-Link DIR-651 User Manual
Preface
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
Revision Date Description
1.0 January 25, 2011 • Initial Release
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 © 2011 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.
iD-Link DIR-651 User Manual
Table of Contents
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
Getting Started .............................................................................. 9
Conguration ...................................................................10
Web-based Conguration Utility ..........................................10
Setup Wizard ........................................................................11
Internet Connection .....................................................11
Wireless Settings ............................................................11
Manual Conguration .......................................................15
Dynamic (Cable) .............................................................16
Internet Setup ......................................................................17
PPPoE (DSL) ......................................................................17
PPTP ....................................................................................18
L2TP ....................................................................................19
Static (assigned by ISP) ................................................20
Wireless Settings .................................................................21
Network Settings ................................................................22
DHCP Server Settings ...................................................23
DHCP Reservation .........................................................24
Virtual Server ........................................................................25
Port Forwarding ..................................................................27
Application Rules ................................................................28
QoS Engine............................................................................29
Network Filters .....................................................................31
Access Control .....................................................................32
Access Control Wizard ..................................................32
Website Filter ........................................................................35
Inbound Filter ......................................................................36
Firewall Settings ..................................................................37
Application Level Gateway Conguration .................38
Routing ...................................................................................39
Advanced Wireless Settings ............................................40
Wi-Fi Protected Setup (WPS) ..........................................41
Advanced Network Settings ...........................................42
UPnP ...................................................................................42
Internet Ping Block ........................................................42
Internet Port Speed .......................................................42
Multicast Streams ..........................................................42
Guest Zone ............................................................................43
Administrator Settings ......................................................44
iiD-Link DIR-651 User Manual
Table of Contents
Time Settings .......................................................................45
SysLog .....................................................................................46
Email Settings ......................................................................47
System Settings ...................................................................48
Update Firmware ................................................................49
Language Pack ................................................................49
DDNS .......................................................................................50
System Check .......................................................................51
Schedules ..............................................................................52
Device Information ............................................................53
Log ...........................................................................................54
Stats .........................................................................................55
Internet Sessions .................................................................56
Wireless ..................................................................................57
Support ..................................................................................58
Wireless Security .............................................................59
Troubleshooting ..............................................................74
Wireless Basics .................................................................78
Tips ...................................................................................................80
Wireless Modes ............................................................................81
Networking Basics ...........................................................82
Check your IP address ...............................................................82
Technical Specications ..................................................84
Contacting Technical Support ........................................85
Warranty ........................................................................... 86
Registration .....................................................................92
What is WPA? ................................................................................59
Wireless Security Setup Wizard .............................................60
Congure WPA-Personal (PSK) ...............................................62
Congure WPA-Enterprise (RADIUS) ....................................63
Connect to a Wireless Network ....................................... 65
Windows® 7 ...................................................................................65
Windows Vista® ............................................................................68
Congure Wireless Security ............................................69
Windows® XP ................................................................................71
Congure WPA-PSK ............................................................72
iiiD-Link DIR-651 User Manual
Section 1 - Product Overview
Product Overview
Package Contents
DIR-651 Wireless N 300 Gigabit Router
Ethernet Cable
Power Adapter
CD-ROM with Manual and Setup Wizard
If any of the above items are missing, please contact your reseller.
Note: Using a power supply with a dierent voltage rating than the one included with the DIR-651 will cause damage and void the warranty.
1D-Link DIR-651 User Manual
Section 1 - Product Overview
System Requirements
Network Requirements
Web-based Conguration
Utility Requirements
• An Ethernet-based Cable or DSL modem
• IEEE 802.11n or 802.11g wireless clients
• 10/100/1000 Ethernet
Computer with the following:
• Windows®, Macintosh, or Linux-based operating system
• An installed Ethernet adapter
Browser Requirements:
• Internet Explorer 6.0 or higher
• Chrome 2.0 or higher
• Firefox 3.0 or higher
• Safari 3.0 or higher
CD Installation Wizard
Requirements
Windows® Users: Make sure you have the latest version of Java
installed. Visit www.java.com to download the latest version.
Computer with the following:
• Windows® 7, Vista®, or XP (Service Pack 2 or higher)
• An installed Ethernet adapter
• CD-ROM drive
2D-Link DIR-651 User Manual
Section 1 - Product Overview
Introduction
TOTAL PERFORMANCE
Combines award winning router features and 802.11n wireless technology to provide the best wireless performance.
TOTAL SECURITY
The most complete set of security features including Active Firewall and 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 N 300 Gigabit Router is an 802.11n compliant device that delivers real world performance of up to 650%
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 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 300 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 300 notebook or desktop adapter and stay connected to your network from virtually anywhere in your home.
TOTAL NETWORK SECURITY
The 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 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 802.11g and 802.11n specications. Actual data throughput will vary. Network conditions and environmental factors,
including volume of network trac, building materials and construction, and network overhead, lower actual data throughput rate. Environmental conditions will adversely
aect wireless signal range.
3D-Link DIR-651 User Manual
Section 1 - Product Overview
• Faster Wireless Networking - The DIR-651 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 650% faster than 802.11g.
• Compatible with 802.11g Devices - The DIR-651 is still fully compatible with the IEEE 802.11g standard, so it
can connect with existing 802.11g PCI, USB and Cardbus adapters.
• Advanced Firewall Features - The Web-based user interface displays a number of advanced network
management features including:
• Content Filtering - Easily applied content ltering based on MAC Address, URL, and/or Domain
Name.
Features
• Filter Scheduling - These lters can be scheduled to be active on certain days or for a duration of
hours or minutes.
• Secure Multiple/Concurrent Sessions - The DIR-651 can pass through VPN sessions. It supports
multiple and concurrent IPSec and PPTP sessions, so users behind the DIR-651 can securely access
corporate networks.
• User-friendly Setup Wizard - Through its easy-to-use Web-based user interface, the DIR-651 lets you control what
information is accessible to those on the wireless network, whether from the Internet or from your company’s
server. Congure your router to your specic settings within minutes.
* Maximum wireless signal rate derived from IEEE Standard 802.11g and 802.11n specications. Actual data throughput will vary. Network conditions and environmental factors,
including volume of network trac, building materials and construction, and network overhead, lower actual data throughput rate. Environmental conditions will adversely
aect wireless signal range.
4D-Link DIR-651 User Manual
Section 1 - Product Overview
Hardware Overview
Connections
1 2 3 4
1 LAN Ports (1-4) Connect Ethernet devices such as computers, switches, and hubs.
2 Internet Port
3 Power Receptor Receptor for the supplied power adapter.
4 Reset Press and hold the Reset button to restore the router to its original factory default settings.
The auto MDI/MDIX Internet port is the connection for the Ethernet cable to the cable or DSL
modem.
5D-Link DIR-651 User Manual
Section 1 - Product Overview
LEDs
2
1
1 Power LED A solid light indicates a proper connection to the power supply.
2 Internet LED
3 WLAN LED A solid light indicates that the wireless segment is ready. This LED blinks during wireless data transmission.
Local Network’s
4
LED
A solid light indicates connection on the Internet port. This LED blinks during data transmission. A solid blue light
indicates that there is an Internet connection, an orange light indicates that there is none.
A solid light indicates a connection to an Ethernet-enabled computer on ports 1-4. This LED blinks during data
transmission.
3
4
6D-Link DIR-651 User Manual
Section 2 - Installation
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.
Before you Begin
Please congure the router with the computer that was last connected directly to your modem. Also, 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.
7D-Link DIR-651 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 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 dierence. A solid metal door or aluminum studs may have a negative eect 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.
8D-Link DIR-651 User Manual
Section 2 - Installation
Getting Started
The DIR-651 includes a Quick Router Setup Wizard CD. Follow the simple steps below to run the Setup Wizard to guide you
quickly through the installation process.
Insert the Quick Router Setup Wizard CD in the CD-ROM drive. The step-by-step instructions that follow are shown in
Windows® XP. The steps and screens are similar for the other Windows operating systems.
If the CD Autorun function does not automatically start on your computer, go to Start > Run. In the run box type
“D:\autorun.exe” (where D: represents the drive letter of your CD-ROM drive).
When the autorun screen appears, click Install.
Note: It is recommended to write down the SSID and Security Key, followed by the login password on the provided CD holder.
9D-Link DIR-651 User Manual
Section 3 - Conguration
Conguration
This section will show you how to congure your new D-Link wireless router using the web-based conguration utility.
Web-based Conguration Utility
To access the conguration utility, open a web-browser such as
Internet Explorer and enter the IP address of the router (192.168.0.1).
You may also connect using the NetBIOS name in the address bar
(http://dlinkrouter).
Select Admin from the drop-down menu and then enter your
password. The password is left blank by default.
If you get a Page Cannot be Displayed error, please refer to the
Troubleshooting section for assistance.
10D-Link DIR-651 User Manual
Section 3 - Conguration
Setup Wizard
Internet Connection
You may click Setup Wizard to quickly congure your router. Skip to the
next page.
If you want to enter your settings without running the wizard, click Manual
Conguration and skip to page 15.
Wireless Settings
Click Launch Internet Connection Setup Wizard to begin.
If you want to congure your wireless settings, click Launch Wireless
Security Setup Wizard and skip to page 60.
To manually congure your wireless settings, click Manual Wireless
Network Setup and skip to page 21.
11D-Link DIR-651 User Manual
Section 3 - Conguration
Click Next to continue.
Create a new password and then click Next to continue.
Select your time zone from the drop-down menu and then click Next to
continue.
Select the type of Internet connection you use and then click Next to
continue.
12D-Link DIR-651 User Manual
Section 3 - Conguration
If you selected Dynamic, you may need to enter the MAC address of the computer
that was last connected directly to your modem. If you are currently using that
computer, click Clone Your PC’s MAC Address and then click Next to continue.
The Host Name is optional but may be required by some ISPs. The default host
name is the device name of the Router and may be changed.
If you selected PPPoE, enter your PPPoE username and password. Click Next to
continue.
Select Static if your ISP assigned you the IP address, subnet mask, gateway, and
DNS server addresses.
Note: Make sure to remove your PPPoE software from your computer. The software
is no longer needed and will not work through a router.
If you selected PPTP, enter your PPTP username and password. Click Next to
continue.
13D-Link DIR-651 User Manual
Section 3 - Conguration
If you selected L2TP, enter your L2TP username and password. Click Next to
continue.
If you selected Static, enter your network settings supplied by your Internet
provider. Click Next to continue.
Click Connect to save your settings. Once the router is nished rebooting, click
Continue. Please allow 1-2 minutes to connect.
Close your browser window and reopen it to test your Internet connection. It
may take a few tries to initially connect to the Internet.
14D-Link DIR-651 User Manual
Section 3 - Conguration
Manual Conguration
My Internet
Connection is:
Enable
Hardware NAT:
Select the type of Internet connection you have.
Select Dynamic IP (DHCP), PPPoE, PPTP, L2TP,
or Static. Refer to the next few pages for more
information.
When this option is enabled, the router will speed
up NAT performance by hardware acceleration
mechanism.
Note: SPI and the QoS engine will be disabled
automatically when hardware NAT is enabled.
15D-Link DIR-651 User Manual
Section 3 - Conguration
Dynamic (Cable)
My Internet
Connection:
Host Name:
Use Unicasting:
Primary/
Secondary DNS
Server:
MTU:
MAC Address:
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 such as Comcast and Cox.
The Host Name is optional but may be required by
some ISPs. Leave blank if you are not sure.
Check the box if you are having problems obtaining
an IP address from your ISP.
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
specically receive these from your ISP.
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specic 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 Clone Your PC’s MAC Address button to
replace the Internet port’s MAC address with the MAC address of your Ethernet card.
16D-Link DIR-651 User Manual
Section 3 - Conguration
Internet Setup
PPPoE (DSL)
Choose PPPoE (Point to Point Protocol over Ethernet) if your ISP uses a PPPoE connection. Your ISP will provide you with a username and password.
This option is typically used for DSL services. Make sure to remove your PPPoE software from your computer. The software is no longer needed and
will not work through a router.
My Internet
Connection:
Address Mode:
IP Address:
User Name:
Password:
Service Name:
Reconnection
Mode:
Maximum Idle
Time:
DNS Addresses:
Select PPPoE (Username/Password) from the drop-down menu.
Select Static if your ISP assigned you the IP address, subnet mask,
gateway, and DNS server addresses. In most cases, select Dynamic.
Enter the IP address (Static PPPoE only).
Enter your PPPoE user name.
Enter your PPPoE password and then retype the password in the
next box.
Enter the ISP Service Name (optional).
Select either Always-on, On-Demand, or Manual.
Enter a maximum idle time during which the Internet connection is maintained during inactivity. To disable this feature, enable
Auto-reconnect.
Enter the Primary and Secondary DNS Server Addresses (Static PPPoE only).
MTU:
MAC Address:
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specic ISP. 1492 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 Clone Your PC’s MAC Address button to
replace the Internet port’s MAC address with the MAC address of your Ethernet card.
17D-Link DIR-651 User Manual
Section 3 - Conguration
PPTP
Choose PPTP (Point-to-Point-Tunneling Protocol ) if your ISP uses a PPTP connection. Your ISP will provide you with a username and password. This
option is typically used for DSL services.
Address Mode:
PPTP IP Address:
PPTP Subnet
Mask:
PPTP Gateway:
PPTP Server IP:
Username:
Password:
Reconnect Mode:
Maximum Idle
Time:
DNS Servers:
Select Static if your ISP assigned you the IP address, subnet
mask, gateway, and DNS server addresses. In most cases, select
Dynamic.
Enter the IP address (Static PPTP only).
Enter the Primary and Secondary DNS Server Addresses (Static
PPTP only).
Enter the Gateway IP Address provided by your ISP.
Enter the Server IP provided by your ISP (optional).
Enter your PPTP username.
Enter your PPTP password and then retype the password in
the next box.
Select either Always-on, On-Demand, or Manual.
Enter a maximum idle time during which the Internet connection
is maintained during inactivity. To disable this feature, enable
Auto-reconnect.
The DNS server information will be supplied by your ISP (Internet Service Provider.)
MTU:
MAC Address:
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specic ISP. 1400 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 Clone Your PC’s MAC Address button to replace
the Internet port’s MAC address with the MAC address of your Ethernet card.
18D-Link DIR-651 User Manual
Section 3 - Conguration
L2TP
Choose L2TP (Layer 2 Tunneling Protocol) if your ISP uses a L2TP connection. Your ISP will provide you with a username and password. This option
is typically used for DSL services.
Address Mode:
L2TP IP Address:
L2TP Subnet
Mask:
L2TP Gateway:
L2TP Server IP:
Username:
Password:
Reconnect Mode:
Maximum Idle
Time:
Select Static if your ISP assigned you the IP address, subnet mask,
gateway, and DNS server addresses. In most cases, select Dynamic.
Enter the L2TP IP address supplied by your ISP (Static only).
Enter the Subnet Mask supplied by your ISP (Static only).
Enter the Gateway IP Address provided by your ISP.
Enter the Server IP provided by your ISP (optional).
Enter your L2TP username.
Enter your L2TP password and then retype the password in the next box.
Select either Always-on, On-Demand, or Manual.
Enter a maximum idle time during which the Internet connection is maintained during inactivity. To disable this feature, enable Autoreconnect.
DNS Servers:
MTU:
Clone MAC
Address:
Enter the Primary and Secondary DNS Server Addresses (Static L2TP only).
Maximum Transmission Unit - you may need to change the MTU for optimal performance with your specic ISP. 1400 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.
19D-Link DIR-651 User Manual
Section 3 - Conguration
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.
IP Address:
Subnet Mask:
Default Gateway:
DNS Servers:
MTU:
MAC Address:
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 specic 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 Clone Your PC’s MAC Address button to replace the
Internet port’s MAC address with the MAC address of your Ethernet
card.
20D-Link DIR-651 User Manual
Section 3 - Conguration
Wireless Settings
Enable Wireless:
Schedule:
Wireless Network
Name:
Enable Auto
Channel Scan:
Wireless
Channel:
802.11 Mode:
Check the box to enable the wireless function. If you do not want to use
wireless, uncheck the box to disable all the wireless functions.
The schedule of time when the wireless settings rules will be enabled.
The schedule may be set to Always, which will allow the particular
service to always be enabled. You can create your own times in the
Tools > Schedules section.
Service Set Identifier (SSID) is the name of your wireless network.
Create a name using up to 32 characters. The SSID is case-sensitive.
The Auto Channel Scan setting can be selected to allow the DIR-651 to
choose the channel with the least amount of interference.
Indicates the channel setting for the DIR-651. By default the channel
is set to 6. The Channel can be changed to t the channel setting for
an existing wireless network or to customize the wireless network. If you enable Auto Channel Scan, this option will be greyed out.
Select one of the following:
802.11g Only - Select if all of your wireless clients are 802.11g.
802.11n Only - Select only if all of your wireless clients are 802.11n.
Mixed 802.11n and 802.11g - Select if you are using a mix of 802.11n and 11g wireless clients.
Channel Width:
Transmission
Rate:
Visibility Status:
Select the Channel Width:
Auto 20/40 - This is the default setting. Select if you are using both 802.11n and non-802.11n wireless devices.
20MHz - Select if you are not using any 802.11n wireless clients.
40MHz - Select if using only 802.11n wireless clients.
Select the transmit rate. It is strongly suggested to select Best (Auto) for best performance.
Select Invisible if you do not want the SSID of your wireless network to be broadcasted by the DIR-651. If Invisible is selected, the
SSID of the DIR-651 will not be seen by Site Survey utilities so your wireless clients will have to know the SSID of your DIR-651
21D-Link DIR-651 User Manual
Section 3 - Conguration
Network Settings
This section will allow you to change the local network settings of the router and to congure the DHCP settings.
Router IP Address:
Subnet Mask:
Device Name:
Local Domain:
Enable DNS Relay:
Enter the IP address of the router. The default IP address
is 192.168.0.1.
If you change the IP address, once you click Apply, you
will need to enter the new IP address in your browser to
get back into the conguration utility.
Enter the Subnet Mask. The default subnet mask is
255.255.255.0.
Enter a name for the router.
Enter the Domain name (Optional).
Uncheck the box to transfer the DNS server information
from your ISP to your computers. If checked, your
computers will use the router for a DNS server.
22D-Link DIR-651 User Manual
Section 3 - Conguration
DHCP Server Settings
DHCP stands for Dynamic Host Control Protocol. The DIR-651 has a built-in DHCP server. The DHCP Server will automatically assign an IP address
to the computers on the LAN/private network. Be sure to set your computers to be DHCP clients by setting their TCP/IP settings to “Obtain an IP
Address Automatically.” When you turn your computers on, they will automatically load the proper TCP/IP settings provided by the DIR-651. The
DHCP Server will automatically allocate an unused IP address from the IP address pool to the requesting computer. You must specify the starting
and ending address of the IP address pool.
Enable DHCP
Server:
DHCP IP Address
Range:
DHCP Lease Time:
Always Broadcast:
NetBIOS
Announcement:
Learn NetBIOS
from WAN:
NetBIOS Scope:
Check this box to enable the DHCP server on your router.
Uncheck to disable this function.
Enter the starting and ending IP addresses for the DHCP
server’s IP assignment.
Note: If you statically (manually) assign IP addresses to
your computers or devices, make sure the IP addresses are
outside of this range or you may have an IP conict.
The length of time for the IP address lease. Enter the
Lease time in minutes.
Enable this feature to broadcast your networks DHCP
server to LAN/WLAN clients.
NetBIOS allows LAN hosts to discover all other computers
within the network, enable this feature to allow the DHCP
Server to oer NetBIOS conguration settings.
Enable this feature to allow WINS information to be learned from the WAN side, disable to allow manual conguration.
This feature allows the conguration of a NetBIOS ‘domain’ name under which network hosts operates. This setting has no eect
if the ‘Learn NetBIOS information from WAN’ is activated.”
NetBIOS Mode
Type:
Primary/
Secondary WINS IP
Address:
Select the dierent type of NetBIOS node: Broadcast only, Point-to-Point, Mixed-mode, and Hybrid.
Enter your Primary (and Secondary) WINS IP address(es).
23D-Link DIR-651 User Manual
Section 3 - Conguration
DHCP Reservation
If you want a computer or device to always have the same IP address assigned, you can create a DHCP reservation. The router will assign the IP
address only to that computer or device.
Note: This IP address must be within the DHCP IP Address Range.
Enable:
Computer Name:
IP Address:
MAC Address:
Copy Your PC’s
MAC Address:
Save:
Number of
Dynamic DHCP
Clients:
Revoke:
Check this box to enable the reservation.
Enter the computer name or select from the drop-down menu
and click <<.
Enter the IP address you want to assign to the computer or
device. This IP Address must be within the DHCP IP Address
Range.
Enter the MAC address of the computer or device.
If you want to assign an IP address to the computer you are
currently on, click this button to populate the elds.
Click Save to save your entry. You must click Save Settings at
the top to activate your reservations.
In this section you can see what LAN devices are currently
leasing IP addresses.
Click Revoke to cancel the lease for a specic LAN device and free an entry in the lease table. Do this only if the device no longer
needs the leased IP address, because, for example, it has been removed from the network.
Reserve:
Note: The Revoke option will not disconnect a PC with a current network session from the network; you would need to use MAC Address Filter
to do that. Revoke will only free up a DHCP Address for the very next requester. If the previous owner is still available, those two devices may
both receive an IP Address Conict error, or the second device may still not receive an IP Address; in that case, you may still need to extend
the “DHCP IP Address Range” to address the issue which is located in the DHCP Server section.
The Reserve option converts this dynamic IP allocation into a DHCP Reservation and adds the corresponding entry to the DHCP
Reservations List.
24D-Link DIR-651 User Manual
Section 3 - Conguration
Virtual Server
The DIR-651 can be congured as a virtual server so that remote users accessing Web or FTP services via the public IP address
can be automatically redirected to local servers in the LAN (Local Area Network).
The DIR-651 rewall feature lters out unrecognized packets to protect your LAN network so all computers networked with
the DIR-651 are invisible to the outside world. If you wish, you can make some of the LAN computers accessible from the
Internet by enabling Virtual Server. Depending on the requested service, the DIR-651 redirects the external service request to
the appropriate server within the LAN network.
The DIR-651 is also capable of port-redirection meaning incoming trac to a particular port may be redirected to a dierent
port on the server computer.
Each virtual service that is created will be listed at the bottom of the screen in the Virtual Servers List. There are pre-dened
virtual services already in the table. You may use them by enabling them and assigning the server IP to use that particular
virtual service.
25D-Link DIR-651 User Manual
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