D-Link DSL-G256DG User manual

Version 1.0 | 04/04/2015
DUAL BAND WIRELESS AC1600 GIGABIT VDSL2
MODEM ROUTER
DSL-G256DG
User Manual

D-Link DSL-G256DG VDSL Router User Manual
Table of Contents Page 2
Table of Contents
Table of Contents................................................................................................... 2
Product Overview................................................................................................... 3
Package Contents................................................................................................ 3
System Requirements.......................................................................................... 3
Features................................................................................................................ 4
Hardware Overview.............................................................................................. 5
Front Panel ....................................................................................................... 5
Rear Panel........................................................................................................ 6
Basic Installation.................................................................................................... 7
Before You Begin ................................................................................................. 7
Installation Notes.................................................................................................. 7
Information you will need from your VDSL service provider............................. 9
Information you will need about this Router.................................................... 10
Information you will need about your LAN or computer.................................. 10
Device Installation .............................................................................................. 11
Power on Router............................................................................................. 11
Factory Reset Button...................................................................................... 11
Network Connections...................................................................................... 12
Getting Started ................................................................................................... 13
How to connect to the Web User Interface..................................................... 13
Web User Interface Configuration...................................................................... 14
Setup Category................................................................................................... 15
WAN Service................................................................................................... 16
Wireless 2.4G ................................................................................................. 33
Wireless 5G .................................................................................................... 35
Local Network................................................................................................. 37
IPv6 Autoconfig............................................................................................... 39
Time and Date ................................................................................................ 41
Advanced Category............................................................................................ 43
Advanced Wireless 2.4G ................................................................................ 45
Advanced Wireless 5G ................................................................................... 63
Port Forwarding .............................................................................................. 81
Port Triggering................................................................................................ 84
DMZ ................................................................................................................ 87
Parental Control.............................................................................................. 88
Filtering Options.............................................................................................. 93
DNS............................................................................................................... 100
Dynamic DNS ............................................................................................... 102
Network Tools............................................................................................... 104
Routing.......................................................................................................... 121
IPSec ............................................................................................................ 127
Power Management...................................................................................... 131
DLNA ............................................................................................................ 133
Storage Service ............................................................................................ 134
IP Tunnel....................................................................................................... 135
Certificates.................................................................................................... 140
Print Server................................................................................................... 147
Samba........................................................................................................... 148
Maintenance Category ..................................................................................... 149
System.......................................................................................................... 150
Firmware Update .......................................................................................... 152
Access Control.............................................................................................. 153
Diagnostics ...................................................................................................157
System Log................................................................................................... 165
Status Category................................................................................................ 168
Device Info.................................................................................................... 169
DHCP Clients................................................................................................ 171
Statistics........................................................................................................ 172
Route Info .....................................................................................................179
WAN Info....................................................................................................... 180
ARP Info........................................................................................................ 181
Help Category................................................................................................... 182
Knowledge Base ................................................................................................ 183
Networking Basics............................................................................................ 183
Wireless Basics................................................................................................ 185
Wireless Modes ............................................................................................ 187
Wireless Security.............................................................................................. 187
What is WPA?............................................................................................... 187
Frequently Asked Questions ............................................................................ 189
Technical Specifications................................................................................... 190

D-Link DSL-G256DG VDSL Router User Manual
Product Overview Page 3
Product Overview
Package Contents
This product should contain all of the below mentioned items within its packaging:
•One VDSL2+ Wireless Router
•One Power Adapter
•One CD containing the User Manual
•One RJ-11 telephone cable
•One CAT-5 Ethernet cable
•One Quick Installation Guide
If any of the above items are missing, please contact your reseller.
Note: Using a power supply with a different voltage rating than the one included with
the router will cause damage to this product and void the warranty for this product.
System Requirements
Network Requirements: •10/100/1000Mbps Ethernet Adapter.
•IEEE 802.11a/b/g/n/ac Wireless Adapter
Web User Interface Requirements: •Windows®, Macintosh, or Linux-based Operating System.
•Internet Explorer 7 or higher, Firefox 3.5 or higher, Safari 4 or higher, or
Chrome 8 or higher.
Internet Requirements: •VDSL Internet Connection Service from an ISP.

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Product Overview Page 4
Features
•Faster Wireless Networking - The router provides up to 300Mbps* for the 2.4GHz band and 1.3Gbps* for the 5GHz band wireless connection with other 802.11n or
802.11ac wireless clients. This capability allows users to participate in real-time activities online, such as video streaming, online gaming, and real-time audio.
•Compatible with 802.11b and 802.11g Devices - The router is fully compatible with the IEEE 802.11b and IEEE 802.11g standards, so it can connect with existing
802.11b and 802.11g PCI, USB and Cardbus adapters.
•DHCP Support - Dynamic Host Configuration Protocol automatically and dynamically assigns all LAN IP settings to each host on your network. This eliminates the need
to reconfigure every host whenever changes in network topology occur.
•Network Address Translation (NAT) - For small office environments, the router allows multiple users on the LAN to access the Internet concurrently through a single
Internet account. This provides Internet access to everyone in the office for the price of a single user. NAT improves network security in effect by hiding the private
network behind one global and visible IP address. NAT address mapping can also be used to link two IP domains via a LAN-to-LAN connection.
•Precise ATM Traffic Shaping - Traffic shaping is a method of controlling the flow rate of ATM data cells. This function helps to establish the Quality of Service for ATM
data transfer.
•High Performance - Very high rates of data transfer are possible with the router. Up to 24Mbps downstream bit rate using the G.dmt standard. (For VDSL2+)
•Full Network Management - The router incorporates SNMP (Simple Network Management Protocol) support for web-based management and text-based network
management via a Telnet connection.
•Easy Installation - The router uses a web-based graphical user interface program for convenient management access and easy set up. Any common web browsing
software can be used to manage this router.
•USB Support- The router provides a USB port to easily share files and printers. The router supports a USB storage option that shares files through a SAMBA file server
and in addition also supports sharing USB printers to network members. Please note that the USB storage device is not included in this package and must be bought
separately.
∗Maximum wireless signal rate derived from IEEE standard 802.11n and 802.11ac specifications. Actual data throughput will vary. Network conditions and environmental factors, including volume of network traffic,
building materials and construction, and network overhead, lower actual data throughput rate. Environmental factors will adversely affect wireless signal range.

D-Link DSL-G256DG VDSL Router User Manual
Product Overview Page 5
Hardware Overview
Front Panel
Number Description
1 Power - A steady green light indicates the unit is powered on. When
the device is powered off this remains dark. During the Power-On
Self-Test this light will be red. If this light remains red after the POST,
a malfunction has occurred.
2 WAN - A solid light indicates a valid link on startup. This light will
blink when there is activity currently passing through the port. A
green light will be illuminated for a 10/100Mbps connection and an
amber light will be illuminated for a 1000Mbps connection.
3 LAN - A solid light indicates a valid link on startup. This light will blink
when there is activity currently passing through the Ethernet port. A
green light will be illuminated for a 10/100Mbps connection and an
amber light will be illuminated for a 1000Mbps connection.
4 2.4GHz WLAN - Steady green light indicates a wireless connection.
A blinking green light indicates activity on the WLAN.
5 5GHz WLAN - Steady green light indicates a wireless connection. A
blinking green light indicates activity on the WLAN.
6 USB - Steady green light indicates a successful USB connection.
Dark if no USB device is connected.
7 DSL - Steady green light indicates a valid VDSL connection. This will
light after the VDSL negotiation process has been settled. A blinking
green light indicates activity on the WAN (VDSL) interface.
8 Internet - Steady green light indicates a successful Internet
connection. Steady red light indicates failed Internet connection. Dark
if no WAN protocol is configured.

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Rear Panel
Number Description
1 VDSL Port - Use the DSL cable to connect to your telephone line
(RJ-11 port).
2 USB Port - Use the USB port to connect your USB device.
3 Ethernet Ports - Use the Ethernet ports to connect the router to your
Ethernet LAN or Ethernet devices.
4 WAN Ports - Use the WAN ports to connect the router to your
Ethernet LAN or Ethernet devices.
5 5GHz Wireless On/Off Switch Button - Please press and hold on
for 3 seconds to turn on/turn off.
6 2.4GHz Wireless On/Off Switch Button - Please press and hold on
for 3 seconds to turn on/turn off.
7 Reset Button - Press and hold the button for 10-15 seconds to
restore the device to its original factory default settings.
8 Power Button - Push in to power-on the router. Push again to
power-off the router.
9 Power Receptor - Receptor for the supplied power adapter.

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Basic 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 read and make sure you understand all the prerequisites for proper installation of your new router. Have all the necessary information and equipment on hand before
beginning the installation.
Installation Notes
In order to establish a connection to the Internet it will be necessary to provide information to the router that will be stored in its memory. For some users, only their account
information (Username and Password) is required. For others, various parameters that control and define the Internet connection will be required.
Low Pass Filters
Since VDSL and telephone services share the same copper wiring to carry their respective signals, a filtering mechanism may be necessary to avoid mutual interference. A
low pass filter device can be installed for each telephone that shares the line with the VDSL line. These filters are easy to install passive devices that connect to the VDSL
device and/or telephone using standard telephone cable. Ask your service provider for more information about the use of low pass filters with your installation.
Operating Systems
The router uses an HTML-based web interface for setup and management. The Web configuration manager may be accessed using any operating system capable of running
web browser software, including Windows®, Macintosh, and Linux-based Operating Systems.
Web Browser
Any common Web browser can be used to configure the router using the Web configuration management software. The program is designed to work best with more recently
released browsers such as Internet Explorer 7 or higher, Firefox 3.5 or higher, Safari 4 or higher, or Chrome 8 or higher.. The Web browser must have JavaScript enabled.
JavaScript is enabled by default on many browsers. Make sure JavaScript has not been disabled by other software (such as virus protection or web user security packages)
that may be running on your computer.
Ethernet Port (NIC Adapter)
Any computer that uses the router must be able to connect to it through one of the Ethernet ports on the router. This connection is an Ethernet connection and therefore
requires that your computer be equipped with an Ethernet port as well. Most notebook computers are now sold with an Ethernet port already installed. Likewise, most fully
assembled desktop computers come with an Ethernet adapter as standard equipment. If your computer does not have an Ethernet port, you must install an Ethernet NIC
adapter before you can use the router. If you must install an adapter, follow the installation instructions that come with the Ethernet NIC adapter.

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Additional Software
It may be necessary to install software on your computer that enables the computer to access the Internet. Additional software must be installed if you are using the device a
simple bridge. For a bridged connection, the information needed to make and maintain the Internet connection is stored on another computer or gateway device, not in the
router itself.
If your VDSL service is delivered through a PPPoE or PPPoA connection, the information needed to establish and maintain the Internet connection can be stored in the
router. In this case, it is not necessary to install software on your computer. It may however be necessary to change some settings in the device, including account information
used to identify and verify the connection.
All connections to the Internet require a unique global IP address. For bridged connections, the global IP settings must reside in a TCP/IP enabled device on the LAN side of
the bridge, such as a PC, a server, a gateway device such as a router or similar firewall hardware. The IP address can be assigned in a number of ways. Your network
service provider will give you instructions about any additional connection software or NIC configuration that may be required.

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Information you will need from your VDSL service provider
Username
This is the Username used to log on to your VDSL service provider’s network. Your VDSL service provider uses this to identify your account.
Password
This is the Password used, in conjunction with the Username above, to log on to your VDSL service provider’s network. This is used to verify the identity of your account.
WAN Setting / Connection Type
These settings describe the method your VDSL service provider uses to transport data between the Internet and your computer. Most users will use the default settings. You
may need to specify one of the following WAN Setting and Connection Type configurations (Connection Type settings listed in parenthesis):
•PPPoE/PPPoA (PPPoE LLC, PPPoE VC-Mux, PPPoA LLC or PPPoA VC-Mux)
•Static/Dynamic IP Address (1483 Routed IP LLC or 1483 Routed IP VC-Mux)
•DHCP IP Address
•Bridge Mode (1483 Bridged IP LLC or 1483 Bridged IP VC Mux)
Modulation Type
VDSL uses various standardized modulation techniques to transmit data over the allotted signal frequencies. Some users may need to change the type of modulation used for
their service. The default DSL modulation (Autosense) used for the router automatically detects all types of VDSL, VDSL2, and VDSL2+ modulation.
Security Protocol
This is the method your VDSL service provider will use to verify your Username and Password when you log on to their network. Your router supports the PAP and CHAP
protocols.
VPI
Most users will not be required to change this setting. The Virtual Path Identifier (VPI) is used in conjunction with the Virtual Channel Identifier (VCI) to identify the data path
between your VDSL service provider’s network and your computer. If you are setting up the router for multiple virtual connections, you will need to configure the VPI and VCI
as instructed by your VDSL service provider for the additional connections. This setting can be changed in the WAN Settings window of the web management interface.
VCI
Most users will not be required to change this setting. The Virtual Channel Identifier (VCI) used in conjunction with the VPI to identify the data path between your VDSL
service provider’s network and your computer. If you are setting up the router for multiple virtual connections, you will need to configure the VPI and VCI as instructed by your
VDSL service provider for the additional connections. This setting can be changed in the WAN Settings window of the web management interface.

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Information you will need about this Router
Username
This is the username needed access the router’s web management interface. When you attempt to connect to the device through a web browser you will be prompted to enter
this username. The default username for the router is “Admin”. Alternatively, you can also try “user”
Password
This is the password you will be prompted to enter when you access the router’s web management interface. The default password is “Admin”. Alternatively, you can also try
“user”
LAN IP Addresses for the Router
This is the IP address you will enter into the Address field of your web browser to access the router’s configuration Graphical User Interface (GUI) using a web browser. The
default IP address is 10.0.0.138. This may be changed to suit any IP address scheme the user desires. This address will be the base IP address used for DHCP service on
the LAN when DHCP is enabled.
LAN Subnet Mask for the Router
This is the subnet mask used by the Router, and will be used throughout your LAN. The default subnet mask is 255.255.255.0. This can be changed later.
Information you will need about your LAN or computer
Ethernet NIC
If your computer has an Ethernet NIC, you can connect the router to this Ethernet port using an Ethernet cable. You can also use the Ethernet ports on the router to connect
to other computer or Ethernet devices.
DHCP Client status
Your VDSL router is configured, by default, to be a DHCP server. This means that it can assign an IP address, subnet mask, and a default gateway address to computers on
your LAN. The default range of IP addresses the unit will assign are from 10.0.0.139 to 10.0.0.254. Your computer (or computers) needs to be configured to obtain an IP
address automatically (that is, they need to be configured as DHCP clients.)
Once you have the above information, you are ready to setup and configure your VDSL router.

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Device Installation
The router connects two separate physical interfaces, a VDSL (WAN) and an Ethernet (LAN) interface. Place the router in a location where it can be connected to the various
devices as well as to a power source. The router should not be located where it will be exposed to moisture or excessive heat. Make sure the cables and power cord are
placed safely out of the way so they do not create a tripping hazard. As with any electrical appliance, observe common sense safety procedures.
The router can be placed on a shelf or desktop, ideally you should be able to see the LED indicators on the front if you need to view them for troubleshooting.
Power on Router
The router must be used with the power adapter included with the device.
1. Insert the AC Power Adapter cord into the power receptacle located on the rear panel of the router and plug the adapter into a suitable nearby power source.
2. Press the Power button into the on position. You should see the Power LED indicator light up and remain lit.
3. If the Ethernet port is connected to a working device, check the Ethernet LED indicators to make sure the connection is valid. The router will attempt to establish the
VDSL connection, if the VDSL line is connected and the router is properly configured this should light up after several seconds. If this is the first time installing the
device, some settings may need to be changed before the router can establish a connection.
Factory Reset Button
The router may be reset to the original factory default settings by using a ballpoint pen or paperclip to gently push down the reset button in the following sequence:
1. Press and hold the reset button while the device is powered on for 10-15 seconds.
2. Release the reset button.
Remember that this will wipe out any settings stored in flash memory including user account information and LAN IP settings. The device settings will be restored to the
factory default IP address 10.0.0.138 and the subnet mask is 255.255.255.0.The default management username is “Admin” and the default password is “Admin”.

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Network Connections
Connect VDSL Line
Use the VDSL cable included with the router to connect it to a telephone wall socket or receptacle. Plug one end of the cable into the VDSL port (RJ-11 receptacle) on the
rear panel of the router and insert the other end into the RJ-11 wall socket. If you are using a low pass filter device, follow the instructions included with the device or given to
you by your service provider. The VDSL connection represents the WAN interface, the connection to the Internet. It is the physical link to the service provider’s network
backbone and ultimately to the Internet.
Connect Router to Ethernet
The router may be connected to a single computer or Ethernet device through the Ethernet ports on the rear panel. Any connection to an Ethernet concentrating device such
as a switch or hub must operate at a speed of 10/100/1000Mbps. When connecting the router to any Ethernet device that is capable of operating at speeds higher than
10Mbps, be sure that the device has auto-negotiation (NWay) enabled for the connecting port. Use standard twisted-pair cable with RJ-45 connectors. The RJ-45 ports on the
router are a crossed port (MDI-X). Follow standard Ethernet guidelines when deciding what type of cable to use to make this connection. When connecting the router directly
to a PC or server use a normal straight-through cable. You should use a crossed cable when connecting the router to a normal (MDI-X) port on a switch or hub. Use a normal
straight-through cable when connecting it to an uplink (MDI-II) port on a hub or switch. The rules governing Ethernet cable lengths apply to the LAN to router connection. Be
sure that the cable connecting the LAN to the router does not exceed 100 meters.
Hub or Switch to Router Connection
Connect the router to an uplink port (MDI-II) on an Ethernet hub or switch with a straight-through cable. If you wish to reserve the uplink port on the switch or hub for another
device, connect to any on the other MDI-X ports (1x, 2x, etc.) with a crossed cable.
Computer to Router Connection
You can connect the router directly to an Ethernet adapter card (NIC) installed on a PC using the Ethernet cable provided.

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Getting Started
This section will show you how to set up and configure your new D-Link router using the Web-based configuration utility.
How to connect to the Web User Interface
Connect to the Router
To configure the WAN connection used by the router it is first necessary to communicate with the router through its management interface, which is HTML-based and can be
accessed using a web browser. The easiest way to make sure your computer has the correct IP settings is to configure it to use the DHCP server in the router.
To access the web user interface, open a web-browser such as Internet Explorer and
enter the IP address of the router (10.0.0.138) into the address bar and press the
Enter key on your keyboard.
Type “Admin” in the User Name field and “Admin” in the Password field, and enter
the validation code. Click the Login button to proceed. If you get a Page Cannot be
Displayed error, please refer to the Troubleshooting section for assistance.
Tick the Remember my login info on this computer option to allow the browser to
remember the login information for the next login.

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Web User Interface Configuration
After successfully logging into the Web User Interface, the following page will be displayed. This page is divided into clickable components that make the configuration of this
device easier and more understandable.
The top menu lists out the Categories available for configuration. The categories
available to configure on this device are Setup,Advanced,Maintenance,Status
and Help.
The left menu lists out the Pages available, for each individual category, for
configuration. In this example, we observe the pages available in the Setup category.
Every category will have a Logout option at the bottom of all the pages. This option
can be used to log out from the web user interface and also close the browser.

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Setup Category
The Setup category is designed to assist the user with essential configurations, concerning the initial setup of this product.
The following pages can be found in the Setup category:
•Wan Service – On this page the user can configure services related to the
WAN connectivity of this product.
•Wireless 2.4G – On this page the user can configure services related to the
Wireless 2.4GHz connectivity of this product.
•Wireless 5G – On this page the user can configure services related to the
Wireless 5GHz connectivity of this product.
•Local Network – On this page the user can configure services related to the
Local Area Network connectivity of this product. Services available for
configuration are LAN Interface configuration and DHCP configuration.
•IPv6 Autoconfig – On this page the user can configure services related to
the IPv6 connectivity of this product.
•Time and Date – On this page the user can configure services related to the
time and date feature of this product. Time Servers and a Time Zone can be
specified here.

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WAN Service
To access the WAN Service page, click the Setup menu link, at the top, and then click the WAN Services menu link, on the left.
On this page the user can configure services related to the WAN connectivity of this
product.

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ATM Interface
Click the ATM Interface button to access the ATM Interface WAN Settings
configuration page.
After clicking the ATM Interface button, the DSL ATM Interface Configuration page
will be available.
In the ATM Interface Configurationsection, here, we can view a list of existing
interfaces configured.
Click the Add button to add a new interface.
Click the Edit button to modify the entry.
Select the Remove option and click the Remove button to remove the specific
interface.

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After clicking the Add button, the ATM PVC Configuration page will be available.
Enter the correct VPI and VCI values. These can also be changed if requested to do
so by the Internet Service Provider (ISP).
Select the appropriate DSL Latency option. Options to choose from are Path0 (Fast)
and Path1 (Interleaved).
Here we can select the DSL Link Type used. The Encapsulation Mode will change
depending on the DSL Link Type selected. Options to choose from are EoA,
PPPoA, and IPoA.
After selecting the EoA option, select the Encapsulation Mode. Options to choose from are LLC/SNAP-BRIDGING and VC/MUX.
After selecting the PPPoA option, the Connection Mode option will be disabled.
Select the Encapsulation Mode. Options to choose from are VC/MUX and
LLC/ENCAPSULATION.
After select the IPoA option, the Connection Mode option will be disabled.
Select the Encapsulation Mode. Options to choose from are LLC/SNAP-ROUTING
and VC/MUX.
Here we can select the Service Category. Options to choose from are UBR Without
PCR, UBR With PCR, CBR, Non Realtime VBR, and Realtime VBR.
After selecting UBR Without PCR, no additional field will be available.
After selecting UBR With PCR, the Peak Cell Rate field will be available. Enter the
Peak Cell Rate value here.
After selecting CBR, the Peak Cell Rate field will be available. Enter the Peak Cell
Rate value here.

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After selecting Non Realtime VBR, the Peak Cell Rate, Sustainable Cell Rate, and
Maximum Burst Size fields will be available. Enter the Peak Cell Rate, Sustainable
Cell Rate, and Maximum Burst Size values used here.
After selecting Realtime VBR, the Peak Cell Rate, Sustainable Cell Rate, and
Maximum Burst Size fields will be available. Enter the Peak Cell Rate, Sustainable
Cell Rate, and Maximum Burst Size values used here.
Select the Scheduler for Queues of Equal Precedence as the Default Queue
option here. Options to choose from are Weighted Round Robin and Weighted Fair
Queuing.
Also enter the Default Queue Weight, Default Queue Precedence, VC WRR
Weight, and VC Precedence value used here.
Click the Back button to return to the previous page.
Click the Apply/Save button to accept the changes made.
Click the Cancel button to discard the changes made and return to the main page.

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PTM Interface
Click the PTM Interface button to access the PTM Interface WAN Settings
configuration page.
After clicking the PTM Interface button, the DSL PTM Interface Configuration page
will be available.
Here you can view the Interface, DSL Latency, PTM Priority, Connection Mode,
and IP QoS. You can remove the configuration option by clicking the Remove
checkbox.
Click the Add button to add a new interface.
Select the Remove option and click the Remove button to remove the specific
interface.