D-Link AC1200 User manual

User Manual
DIR-842V2
AC1200 Wi-Fi Gigabit Router
August 2021

DIR-842V2 AC1200 Wi-Fi Gigabit Router
User Manual
Page 2
Contents
Chapter 1. Introduction ................................................................................................... 5
Contents and Audience ....................................................................................................................................5
Conventions ............................................................................................................................................................5
Document Structure............................................................................................................................................5
Chapter 2. Overview............................................................................................................. 6
General Information .........................................................................................................................................6
Specifications .....................................................................................................................................................8
Product Appearance. ...................................................................................................................................... 14
Front Panel. .................................................................................................................................................. 14
Back Panel...................................................................................................................................................... 16
Delivery Package. ........................................................................................................................................... 18
Chapter 3. Installation and Connection. ........................................................... 19
Before You Begin. ........................................................................................................................................... 19
Connecting to PC. ........................................................................................................................................... 20
PC with Ethernet Adapter. ................................................................................................................... 20
Obtaining IP Address Automatically (OS Windows 7). ........................................................ 21
Obtaining IP Address Automatically (OS Windows 10)....................................................... 26
PC with Wi-Fi Adapter. .......................................................................................................................... 31
Obtaining IP Address Automatically and Connecting
to Wireless Network (OS Windows 7)............................................................................................. 31
Obtaining IP Address Automatically and Connecting
to Wireless Network (OS Windows 10)........................................................................................... 34
Connecting to Web-based Interface. ................................................................................................... 37
Web-based Interface Structure.............................................................................................................. 39
Home Page.........................................................................................................................................................39
Internet Section. ..................................................................................................................................40
DIR-842V2 Section................................................................................................................................. 41
Wi-Fi Clients Section. ......................................................................................................................42
Menu Sections. ..............................................................................................................................................43
Notifications. ..............................................................................................................................................44
Chapter 4. Configuring via Web-based Interface......................................... 45
Setup Wizard. .....................................................................................................................................................45
Selecting Operation Mode.....................................................................................................................47
Router...........................................................................................................................................................47
Access Point or Repeater. ...............................................................................................................49
Changing LAN IPv4 Address. .................................................................................................................51
Wi-Fi Client. ................................................................................................................................................52
Configuring Wired WAN Connection..................................................................................................54
Static IPv4 Connection.....................................................................................................................55
Static IPv6 Connection.....................................................................................................................56
PPPoE, IPv6 PPPoE, PPPoE Dual Stack,
PPPoE + Dynamic IP (PPPoE Dual Access) Connections...................................................57
PPPoE + Static IP (PPPoE Dual Access) Connection........................................................58
PPTP + Dynamic IP or L2TP + Dynamic IP Connection. ....................................................59
PPTP + Static IP or L2TP + Static IP Connection. .........................................................60
Configuring Wireless Network............................................................................................................61

DIR-842V2 AC1200 Wi-Fi Gigabit Router
User Manual
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Configuring LAN Ports for IPTV/VoIP. ..........................................................................................63
Changing Web-based Interface Password. .....................................................................................65
Settings / Internet......................................................................................................................................67
WAN.....................................................................................................................................................................67
Creating Dynamic IPv4 or Static IPv4 WAN Connection. .............................................69
Creating Dynamic IPv6 or Static IPv6 WAN Connection. .............................................72
Creating PPPoE WAN Connection. .................................................................................................76
Creating PPTP, L2TP, or L2TP over IPsec WAN Connection.......................................81
Creating PPPoE IPv6 or PPPoE Dual Stack WAN Connection. ......................................86
VLAN. .................................................................................................................................................................92
DNS.....................................................................................................................................................................95
Settings / WAN Failover..........................................................................................................................97
Settings / Wireless network. ............................................................................................................ 100
Settings / Network................................................................................................................................... 110
IPv4........................................................................................................................................................... 110
IPv6........................................................................................................................................................... 116
Functions / Firewall. ............................................................................................................................. 120
IP Filter. .................................................................................................................................................. 120
DMZ.
................................................................................................................................................................. 124
MAC Filter. ................................................................................................................................................ 126
AdBlock. ....................................................................................................................................................... 128
Functions / Wi-Fi. .................................................................................................................................... 129
Client Management. ............................................................................................................................... 129
WPS.................................................................................................................................................................. 130
Using WPS Function via Web-based Interface. ............................................................... 132
Using WPS Function without Web-based Interface....................................................... 132
WMM.................................................................................................................................................................. 133
Client........................................................................................................................................................... 135
Client Shaping........................................................................................................................................ 137
Additional. ................................................................................................................................................ 139
MAC Filter. ................................................................................................................................................ 143

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Functions / Advanced...............................................................................................................................146
UPnP IGD.......................................................................................................................................................146
Remote Access...........................................................................................................................................147
Virtual Servers......................................................................................................................................149
Static Route. ............................................................................................................................................152
Dynamic DNS..................................................................................................................................................154
IPsec. ...............................................................................................................................................................156
Ports Settings...........................................................................................................................................164
Redirect. ........................................................................................................................................................167
IGMP/MLD. ........................................................................................................................................................168
ALG/Passthrough. .......................................................................................................................................169
Management.........................................................................................................................................................171
System Time..................................................................................................................................................171
Administration...........................................................................................................................................174
Telnet/SSH. ...................................................................................................................................................176
Firmware Update. .......................................................................................................................................177
Local Update. ...................................................................................................................................... 178
Remote Update. .................................................................................................................................... 179
Schedule. ........................................................................................................................................................180
Statistics. ...................................................................................................................................................184
Network Statistics. ........................................................................................................................ 184
Port Statistics. ............................................................................................................................... 185
Routing. .................................................................................................................................................. 186
DHCP. ......................................................................................................................................................... 188
Multicast Groups. ............................................................................................................................. 189
Diagnostics..................................................................................................................................................190
Ping. ......................................................................................................................................................... 190
Chapter 5. Operation Guidelines. ......................................................................... 192
Wireless Installation Considerations. ..........................................................................................193
Chapter 6. Abbreviations and Acronyms. ........................................................ 194

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User Manual Introduction
CHAPTER 1. INTRODUCTION
Contents and Audience
This manual describes the router DIR-8425V2 and explains how to configure and operate it.
This manual is intended for users familiar with basic networking concepts, who create an in-home
local area network, and system administrators, who install and configure networks in offices.
Conventions
Example Description
text The body text of the manual.
Before You Begin A reference to a chapter or section of this manual.
“Quick Installation
Guide”
A reference to a document.
Change A name of a menu, menu item, control (field, checkbox, drop-down
list, button, etc.).
192.168.0.1
Data that you should enter in the specified field.
!
Information An important note.
Document Structure
Chapter 1 describes the purpose and structure of the document.
Chapter 2 gives an overview of the router's hardware and software features, describes its
appearance and the package contents.
Chapter 3 explains how to install the router DIR-842V2 and configure a PC in order to access its
web-based interface.
Chapter 4 describes all pages of the web-based interface in detail.
Chapter 5 includes safety instructions and tips for networking.
Chapter 6 introduces abbreviations and acronyms most commonly used in User Manuals forD-
Link customer premises equipment.

DIR-842V2 AC1200 Wi-Fi Gigabit Router
User Manual
Overview
Page 6
CHAPTER 2. OVERVIEW
General Information
The DIR-842V2 device is a wireless dual band gigabit router with 3G/LTE support. It provides a
fast and simple way to create a wireless and wired network at home or in an office.
The DIR-842V2 device is a wireless dual band gigabit router with a built-in 4-port switch.
Also you are able to connect the wireless router DIR-842V2 to a cable or DSL modem or to
a private Ethernet line and use a high-speed Internet connection to successfully fulfill
a wide range of professional tasks. The built-in 4-port switch enables you to connect Ethernet-
enabled computers, game consoles, and other devices to your network.
Using the DIR-842V2 device, you are able to quickly create a high-speed wireless network at home
or in your office, which lets computers and mobile devices access the
Internet virtually anywhere (within the operational range of your wireless network).
Simultaneous activity of 2.4GHz band and 5GHz band allows performing a wide range of
tasks. The router can operate as a base station for connecting wireless devices of the
standards 802.11a, 802.11b, 802.11g, 802.11n, and 802.11ac (at the wireless connection rate up to
1167Mbps1).
The router supports multiple functions for the wireless interface: several security standards
(WEP, WPA/WPA2/WPA3), MAC address filtering, WPS, WMM.
In addition, the device is equipped with a button for switching the Wi-Fi network off/on. If needed,
for example, when you leave home, you can easily switch the router’s WLAN by pressing
the button, and devices connected to the LAN ports of the router will stay online.
Multi-user MIMO technology allows to distribute the router's resources to let multiple
wireless clients use the Wi-Fi network efficiently, keeping high rates for HD media
streaming, lag-free gaming, and fast transfer of large files.
Transmit Beamforming technology allows to flexibly change the antennas' radiation pattern and
to redistribute the signal directly to wireless devices connected to the router.
1Up to 300Mbps for 2.4GHz and up to 867Mbps for 5GHz.
2Up to 6 devices.

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Support of guest Wi-Fi network allows you to create a separate wireless network with individual
security settings and maximum rate limitation. Devices connected to the guest network will be able
to access the Internet, but will be isolated from the devices and resources of the router's LAN.
The wireless router DIR-842V2 includes a built-in firewall. The advanced security functions
minimize threats of hacker attacks and prevent unwanted intrusions to your network.
The SSH protocol support provides more secure remote configuration and management of the
router due to encryption of all transmitted traffic, including passwords.
In addition, the router supports IPsec and allows to create secure VPN tunnels. Support of the
IKEv2 protocol allows to provide simplified message exchange and use asymmetric authentication
engine upon configuration of an IPsec tunnel.
Built-in Yandex.DNS service protects against malicious and fraudulent web sites and helps to block
access to adult content on children's devices.
Now the schedules are also implemented; they can be applied to the rules and settings of the
firewall and used to reboot the router at the specified time or every specified time period and to
enable/disable the wireless network and the Wi-Fi filter.
The new ad blocking function effectively blocks advertisements which appear during web surfing.
You can configure the settings of the wireless router DIR-842V2 via the user-friendly web-
based interface (the interface is available in several languages).
The Setup Wizard allows you to quickly switch DIR-842V2 to one of the following modes: router
(for connection to a wired or wireless ISP), access point, repeater, or client, and then
configure all needed setting for operation in the selected mode in several simple steps.
Also DIR-842V2 supports configuration and management via mobile application for Android
and iPhone smartphones.
You can simply update the firmware: the router itself finds approved firmware on D-Link update
server and notifies when ready to install it.

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User Manual
AC1200 Wi-Fi Gigabit Router
Overview
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Specifications*
Hardware
Processor
· RTL8197FH-VG (1GHz)
RAM
· 128MB, DDR2, built in processor
Flash
· 128MB, SPI NAND
Interfaces
· 10/100/1000BASE-T WAN port
· 4 10/100/1000BASE-T LAN ports
LEDs
· Power
· Internet
· WLAN 2.4G
· WLAN 5G
Buttons
· ON/OFF button to power on/power off
· RESET button to restore factory default settings
· WPS button to connect mesh network devices, set up wireless connection, and
enable/disable wireless network
Antenna
· Four external non-detachable antennas (5dBi gain)
MIMO
· 2 x 2, MU-MIMO
Power connector
· Power input connector (DC)
Software
WAN connection types
· Mobile Internet
· PPPoE
· IPv6 PPPoE
· PPPoE Dual Stack
· Static IPv4 / Dynamic IPv4
· Static IPv6 / Dynamic IPv6
· PPPoE + Static IP (PPPoE Dual Access)
· PPPoE + Dynamic IP (PPPoE Dual Access)
· PPTP/L2TP + Static IP
· PPTP/L2TP + Dynamic IP
* The device features are subject to change without notice. For the latest versions of the firmware and relevant documentation, visit
https://eu.dlink.com/

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User Manual
AC1200 Wi-Fi Gigabit Router
Overview
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Software
Network functions
· DHCP server/relay
· Advanced configuration of built-in DHCP server
· Stateful/Stateless mode for IPv6 address assignment, IPv6 prefix delegation
· Automatic obtainment of LAN IP address (for access point/repeater/client
modes)
· DNS relay
· Dynamic DNS
· Static IPv4/IPv6 routing
· IGMP/MLD Proxy
· RIP
· Support of UPnP IGD
· Support of VLAN
· WAN ping respond
· Support of SIP ALG
· Support of RTSP
· WAN failover
· Autonegotiation of speed, duplex mode, and flow control / Manual speed and
duplex mode setup for each Ethernet port
Firewall functions
· Network Address Translation (NAT)
· Stateful Packet Inspection (SPI)
· IPv4/IPv6 filter
· MAC filter
· Ad blocking function
· DMZ
· Virtual servers
· Built-in Yandex.DNS web content filtering service
VPN
· IPsec/PPTP/L2TP/PPPoE pass-through
· PPTP/L2TP tunnels
· L2TP over IPsec
· IPsec tunnels
Transport/Tunnel mode
IKEv1/IKEv2 support
DES encryption
NAT Traversal
Support of DPD (Keep-alive for VPN tunnels)

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AC1200 Wi-Fi Gigabit Router
Overview
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Software
Management and monitoring
· Local and remote access to settings through SSH/TELNET/WEB
(HTTP/HTTPS)
· Multilingual web-based interface for configuration and management
· Support of D-Link Assistant application for Android and iPhone smartphones
· Notification on connection problems and auto redirect to settings
· Firmware update via web-based interface
· Automatic notification on new firmware version
· Saving/restoring configuration to/from file
· Automatic synchronization of system time with NTP server and manual
time/date setup
· Ping utility
· Traceroute utility
· TR-069 client
· Schedules for rules and settings of firewall, automatic reboot, and
enabling/disabling wireless network and Wi-Fi filter
Wireless Module Parameters
Standards
· IEEE 802.11ac Wave 2
· IEEE 802.11a/b/g/n
· IEEE 802.11k/v
· IEEE 802.11w
Frequency range
The frequency range depends upon the
radio frequency regulations applied in your
country
· 2400 ~ 2483.5MHz
· 5150 ~ 5350MHz
· 5650 ~ 5850MHz
Wireless connection security
· WEP
· WPA/WPA2 (Personal/Enterprise)
· WPA3 (Personal)
· МАС filter
· WPS (PBC)
Advanced functions
· Support of client mode
· WMM (Wi-Fi QoS)
· Information on connected Wi-Fi clients
· Advanced settings
· Guest Wi-Fi / support of MBSSID
· Rate limitation for wireless network/separate MAC addresses
· Periodic scan of channels, automatic switch to least loaded channel
· Support of 5GHz TX Beamforming
· Autonegotiation of channel bandwidth in accordance with environment
conditions (20/40 Coexistence)
· Support of STBC
Wireless connection rate
· IEEE 802.11a: 6, 9, 12, 18, 24, 36, 48, and 54Mbps
· IEEE 802.11b: 1, 2, 5.5, and 11Mbps
· IEEE 802.11g: 6, 9, 12, 18, 24, 36, 48, and 54Mbps
· IEEE 802.11n (2.4GHz/5GHz): from 6.5 to 300Mbps (MCS0–MCS15)
· IEEE 802.11ac (5GHz): from 6.5 to 867Mbps

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Wireless Module Parameters
Transmitter output power
The maximum value of the transmitter
output power depends upon the radio
frequency regulations applied in your
country
· 802.11a (typical at room temperature 25 °C)
15dBm at 6, 54Mbps
· 802.11g (typical at room temperature 25 °C)
15dBm at 6, 54Mbps
· 802.11n (typical at room temperature 25 °C)
2.4GHz
15dBm at MCS0, 7
5GHz
15dBm at MCS0, 7
· 802.11ac (typical at room temperature 25 °C)
15dBm at MCS0, 9
Receiver sensitivity
· 802.11a (typical at PER < 10% (1000-byte PDUs) at room temperature 25 °C)
-95dBm at 6Mbps
-93dBm at 9Mbps
-92dBm at 12Mbps
-90dBm at 18Mbps
-87dBm at 24Mbps
-84dBm at 36Mbps
-80dBm at 48Mbps
-78dBm at 54Mbps
· 802.11b (typical at PER = 8% (1000-byte PDUs) at room temperature 25 °C)
-90dBm at 1Mbps
-92dBm at 2Mbps
-93dBm at 5.5Mbps
-96dBm at 11Mbps
· 802.11g (typical at PER < 10% (1000-byte PDUs) at room temperature 25 °C)
-94dBm at 6Mbps
-92dBm at 9Mbps
-90dBm at 12Mbps
-89dBm at 18Mbps
-87dBm at 24Mbps
-84dBm at 36Mbps
-80dBm at 48Mbps
-77dBm at 54Mbps
· 802.11n (typical at PER = 10% (1000-byte PDUs) at room temperature 25 °C)
2.4GHz, HT20
-95dBm at MCS0
-91dBm at MCS1
-88dBm at MCS2
-86dBm at MCS3
-82dBm at MCS4
-79dBm at MCS5
-77dBm at MCS6
-75dBm at MCS7
2.4GHz, HT40
-92dBm at MCS0
-89dBm at MCS1
-86dBm at MCS2
-83dBm at MCS3
-80dBm at MCS4
-77dBm at MCS5
-74dBm at MCS6
-72dBm at MCS7

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Wireless Module Parameters
5GHz, HT20
-95dBm at MCS0
-93dBm at MCS1
-90dBm at MCS2
-87dBm at MCS3
-83dBm at MCS4
-79dBm at MCS5
-77dBm at MCS6
-75dBm at MCS7
5GHz, HT40
-92dBm at MCS0
-89dBm at MCS1
-86dBm at MCS2
-83dBm at MCS3
-80dBm at MCS4
-76dBm at MCS5
-74dBm at MCS6
-72dBm at MCS7
· 802.11ac (typical at PER = 10% (1000-byte PDUs) at room temperature 25 °C)
VHT20
-95dBm at MCS0
-92dBm at MCS1
-90dBm at MCS2
-86dBm at MCS3
-83dBm at MCS4
-79dBm at MCS5
-77dBm at MCS6
-75dBm at MCS7
-71dBm at MCS8
VHT40
-92dBm at MCS0
-89dBm at MCS1
-87dBm at MCS2
-84dBm at MCS3
-80dBm at MCS4
-76dBm at MCS5
-74dBm at MCS6
-72dBm at MCS7
-68dBm at MCS8
-66dBm at MCS9
VHT80
-89dBm at MCS0
-86dBm at MCS1
-83dBm at MCS2
-80dBm at MCS3
-77dBm at MCS4
-73dBm at MCS5
-71dBm at MCS6
-69dBm at MCS7
-66dBm at MCS8
-64dBm at MCS9
Modulation schemes
· 802.11a: BPSK, QPSK, 16QAM, 64QAM with OFDM
· 802.11b: DQPSK, DBPSK, DSSS, CCK
· 802.11g: BPSK, QPSK, 16QAM, 64QAM with OFDM
· 802.11n: BPSK, QPSK, 16QAM, 64QAM with OFDM
· 802.11ac: BPSK, QPSK, 16QAM, 64QAM, up to 256QAM with OFDM

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AC1200 Wi-Fi Gigabit Router
Overview
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Physical Parameters
Dimensions (L xWx H)
· 181 x 132.5 x 47.71 mm (7.13 x 5.22 x 1.88 in)
Weight
· 304.8 g (0.67 lb)
Operating Environment
Power
· Output: 12V DC, 1.5A
Temperature
· Operating: from 0 to 40 °C
· Storage: from -20 to 65 °C
Humidity
· Operating: from 10% to 90% (non-condensing)
· Storage: from 5% to 95% (non-condensing)

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AC1200 Wi-Fi Gigabit Router
Overview
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Product Appearance
Front Panel
Figure 1. Front panel view.
LED Mode Description
Power
Solid blue The router is powered on.
No light The router is powered off.
Internet
Solid blue The default wired WAN connection is on.
Slow blinking blue The firmware is being updated.
Fast blinking blue The device is in the emergency mode. Restore the
factory default settings via the hardware RESET button.

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LED Mode Description
No light • The default wired WAN connection is off, or
• there are no WAN connections created.
WLAN 2.4G
WLAN 5G
Fast blinking blue
Data transfer through the Wi-Fi network of the relevant
band.
Slow blinking blue
When attempting to connect mesh network devices or
add a wireless device via the WPS function, the LEDs
are blinking one at a time.

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Back Panel
Figure 2. Back panel view.
Name Description
RESET
A button to restore the factory defaults.
To restore the factory defaults, push the button (with the device turned
on), hold it for 10 seconds, and then release the button.
WPS
A button to connect mesh network devices or set up wireless
connection (the WPS function).
To connect mesh network devices or use the WPS function: with the
device turned on, push and release the button.
To disable the router's wireless network: with the device turned on,
push the button, hold it for 10 seconds, and release.
LAN 1-4 4 Ethernet ports to connect computers or network devices.

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Name Description
WAN
A port to connect to a cable or DSL modem or to a private Ethernet
line (it is recommended to use the cable included in the delivery
package).
12V=1.5A Power connector.
ON/OFF A button to turn the router on/off.
The device is also equipped with four external non-detachable Wi-Fi antennas.

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Delivery Package
The following should be included:
• Router DIR-842V2
• Power adapter DC 12V/1.5A
• Ethernet cable
• “Quick Installation Guide” (brochure).
The “User Manual” and “Quick Installation Guide” documents are available on D-Link website
(see https://eu.dlink.com/)
!
Using a power supply with a different voltage rating than the one included will cause
damage and void the warranty for this product.

DIR-842V2 AC1200 Wi-Fi Gigabit Router
User Manual
Installation and Connection
Page 19
CHAPTER 3. INSTALLATION AND CONNECTION
Before You Begin
Please, read this manual prior to installing the device. Make sure that you have all the necessary
information and equipment.
Computer or Mobile Device
Configuration of the wireless dual band gigabit router with a built-in 4-port switch DIR-842V2
(hereinafter referred to as “the router”) is performed via the built-in web-based interface. The web-
based interface is available from any operating system that supports a web browser.
PC Web Browser
The following PC web browsers are recommended:
• Apple Safari 8 and later
• Google Chrome 48 and later
• Microsoft Internet Explorer 10 and later
• Microsoft Edge 20.10240 and later
• Mozilla Firefox 44 and later
• Opera 35 and later.
For successful operation, JavaScript should be enabled on the web browser. Make sure that
JavaScript has not been disabled by other software (such as virus protection or web user security
packages) running on your computer.
Wired or Wireless NIC (Ethernet or Wi-Fi Adapter)
Any computer that uses the router should be equipped with an Ethernet or Wi-Fi adapter (NIC). If
your computer is not equipped with such a device, install an Ethernet or Wi-Fi adapter prior to using
the router.
Wireless Connection
Wireless workstations from your network should be equipped with a wireless 802.11a, b, g, n, or ac
NIC (Wi-Fi adapter). In addition, you should specify the values of SSID, channel number and
security settings defined in the web-based interface of the router for all these wireless workstations.

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Installation and Connection
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Connecting to PC
PC with Ethernet Adapter
1. Connect an Ethernet cable between any of LAN ports located on the back panel of the router
and the Ethernet port of your PC.
2. Connect the power cord to the power connector port on the back panel of the router,
then plug the power adapter into an electrical outlet or power strip.
3. Turn on the router by pressing the ON/OFF button on its back panel.
Then make sure that your PC is configured to obtain an IP address automatically (as DHCP client).