D Link IR822A1 User Manual
Version 1.0 | 18/May/2015
User Manual
AC1200 Wi-Fi Router
DIR-822
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 May 18, 2015 • 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. iPhone, iPad, and iPod touch are registered trademarks of Apple Inc. Android is a trademark of Google, Inc.
All other company or product names mentioned herein are trademarks or registered trademarks of their respective companies.
Copyright © 2015 by D-Link Corporation.
All rights reserved. This publication may not be reproduced, in whole or in part, without prior expressed written permission
from D-Link Corporation.
iD-Link DIR-822 User Manual
Table of Contents
Table of Contents
Preface ................................................................................. i
Manual Revisions ........................................................................... i
Trademarks ...................................................................................... i
Package Contents .........................................................................1
System Requirements ................................................................. 2
Introduction ................................................................................... 3
Features ............................................................................................4
Hardware Overview ..................................................................... 5
Connections ........................................................................... 5
LEDs ........................................................................................... 6
Installation ......................................................................... 7
Before you Begin ...........................................................................7
Wireless Installation Considerations ......................................8
Manual Setup ................................................................................. 9
Conguration ................................................................... 10
Quick Setup Wizard ....................................................................11
QRS Mobile App ..........................................................................16
Web-based Conguration Utility ..........................................20
Internet Connection Setup .............................................21
Internet Connection Setup Wizard ............................... 22
Internet (Manual) ................................................................28
Static (assigned by ISP) ................................................30
PPPoE (DSL) ......................................................................31
PPTP ....................................................................................33
L2TP ....................................................................................35
DS-Lite ...............................................................................37
Wireless Connection Setup Wizard ..............................38
Wi-Fi Protected Setup Wizard .........................................41
Manual Wireless Network Setup ...................................42
Wireless Security .................................................................51
What is WPA? ...................................................................51
Network Settings ................................................................52
Router Settings ...............................................................52
DHCP Server Settings ................................................... 53
DHCP Reservation .........................................................55
IPv6 ..........................................................................................56
IPv6 Internet Connection Setup Wizard ................57
IPv6 Manual Setup.........................................................62
Advanced ...............................................................................71
Virtual Server ................................................................... 71
Port Forwarding .............................................................72
Application Rules ...........................................................73
QoS Engine .......................................................................74
Network Filters ................................................................76
Access Control .................................................................77
Website Filters .................................................................80
Inbound Filters ................................................................81
Firewall Settings .............................................................82
Routing ..............................................................................83
Advanced Wireless ........................................................84
Wi-Fi Protected Setup (WPS) .....................................85
iiD-Link DIR-822 User Manual
Table of Contents
Advanced Network Settings ......................................87
Guest Zone .......................................................................88
IPv6 Firewall .....................................................................89
IPv6 Routing ....................................................................90
Tools ........................................................................................91
Admin.................................................................................91
Time ....................................................................................92
SysLog ................................................................................93
Email Settings..................................................................94
System ...............................................................................95
Firmware ...........................................................................96
Language Pack ................................................................96
Dynamic DNS ..................................................................97
System Check ..................................................................98
Schedules .........................................................................99
Status ................................................................................... 100
Device Info .................................................................... 100
Logs..................................................................................101
Statistics ......................................................................... 102
WPA/WPA2 ......................................................................... 110
Windows® 7 ................................................................................112
WPA/WPA2 ......................................................................... 112
WPS ....................................................................................... 115
Windows Vista® .........................................................................119
WPA/WPA2 ......................................................................... 120
WPS/WCN 2.0 .................................................................... 122
Windows® XP .............................................................................123
WPA/WPA2 ......................................................................... 124
Troubleshooting ............................................................ 126
Wireless Basics ...............................................................130
What is Wireless? ...................................................................... 131
Tips ................................................................................................ 133
Wireless Modes .........................................................................134
Networking Basics .........................................................135
Check your IP address ............................................................ 135
Statically Assign an IP address ............................................ 136
Internet Sessions ......................................................... 103
Wireless...........................................................................104
Routing ........................................................................... 105
IPv6 .................................................................................. 106
IPv6 Routing ................................................................. 107
Support ............................................................................... 108
Connect a Wireless Client to your Router ....................109
WPS Button ................................................................................ 109
Windows® 8 ................................................................................110
Technical Specications ................................................137
Regulatory Information ................................................138
iiiD-Link DIR-822 User Manual
Section 1 - Product Overview
DIR-822 AC1200 Wi-Fi Router
Ethernet Cable
Power Adapter
Package Contents
Wi-Fi Conguration Note
WI-FI Conguration Note
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-822 will cause damage and void the warranty
for this product.
1D-Link DIR-822 User Manual
Section 1 - Product Overview
Network Requirements
Web-based Conguration
Utility Requirements
System Requirements
• An Ethernet-based Cable or DSL modem
• IEEE 802.11ac/n/g/b/a wireless clients
• 10/100 Ethernet
Computer with the following:
• Windows®, Macintosh, or Linux-based operating system
• An installed Ethernet adapter
Browser Requirements:
• Internet Explorer 9 or higher
• Firefox 20 or higher
• Safari 5.1 or higher
• Chrome 25 or higher
QRS Mobile Requirements
Windows
installed. Visit www.java.com to download the latest version.
• iPhone®/iPad®/iPod Touch® (iOS 6.0 or higher)
• Android™ device (2.33 or higher)
®
Users: Make sure you have the latest version of Java
2D-Link DIR-822 User Manual
Section 1 - Product Overview
Introduction
The D-Link DIR-822 is a IEEE 802.11ac compliant device that delivers up to 3x faster speeds than 802.11n while staying backward
compatible with 802.11g/b/a devices. Connect the DIR-822 to a cable or DSL modem and provide high-speed Internet access to
multiple computers, game consoles, and media players. Create a secure wireless network to share photos, les, music, videos,
printers, and network storage. Powered by the 802.11ac technology and equipped with four external antennas, this router
provides superior wireless coverage for larger homes and oces, or for users running bandwidth-intensive applications. The
DIR-822 also includes a 4-port 10/100 Fast Ethernet switch that connects to wired devices for uninterrupted video calling and
faster le transfers.
D-Link Intelligent QoS Technology helps to increase network eciency by analyzing wired and wireless network trac and
prioritizing it in order of importance. This way, important network trac such as VoIP and video streaming, take priority over
background network trac such as a le downloads and print tasks, ensuring you have optimal network performance.
The DIR-822 supports the latest wireless security features to help prevent unauthorized access, be it from over a wireless network
or the Internet. Support for WPA™ and WPA2™ standards ensure that you will be able to use the best possible encryption
regardless of your client devices. In addition, this router is equipped with a dual-active rewall (SPI and NAT) to prevent potential
attacks over the Internet.
3D-Link DIR-822 User Manual
Section 1 - Product Overview
•UltimateFastWirelessNetworking - The DIR-822 provides up to 300 Mbps wireless connection in 2.4 GHz
band, and up to 867 Mbps wireless connection in 5 GHz with other 802.11ac and 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 802.11ac wireless router gives you the freedom of wireless networking
at speeds 3x faster than 802.11n.
•Compatiblewith802.11a/g/nDevices - The DIR-822 is still fully compatible with the IEEE 802.11a, 802.11g
and 802.11n, so it can connect with existing 802.11a, 802.11g and 802.11n PCI, USB, and CardBus adapters.
•AdvancedFirewallFeatures - The web-based user interface displays a number of advanced network
management features including:
• ContentFiltering - Easily applied content ltering based on MAC address, URL, and/or domain
name.
Features
• FilterScheduling - These lters can be scheduled to be active on certain days or for a duration of
hours or minutes.
• SecureMultiple/ConcurrentSessions - The DIR-822 can pass through VPN sessions. It supports
multiple and concurrent IPSec and PPTP sessions, so users behind the DIR-822 can securely access
corporate networks.
•User-friendlySetupWizard - Through its easy-to-use web-based user interface, the DIR-822 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 802.11a, 802.11g, 802.11n and 802.11ac 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-822 User Manual
Section 1 - Product Overview
Hardware Overview
Connections
3
4
5
1
1 LAN Ports (1-4) Connect 10/100 Ethernet devices such as computers, switches, storage (NAS) devices and game consoles.
2 Internet Port Using an Ethernet cable, connect your broadband modem to this port.
3 Power Button Press the power button to power the DIR-822 on and o.
2
4 Power Receptor Receptor for the supplied power adapter.
5 WPS / Reset Button Short press to start the WPS process. Long press for 10 seconds to reset the router to default settings.
5D-Link DIR-822 User Manual
Section 1 - Product Overview
Hardware Overview
LEDs
1 3
5
2 4
1 Power LED
2 Internet LED A solid light indicates that an Internet link is established.
3 WPS LED
4 WLAN LED A solid light indicates that the wireless segment is ready.
5 LAN LEDs 1-4 A solid light indicates a connection to an Ethernet-enabled computer on ports 1-4 respectively.
A solid light indicates that the device is powered on. The light will blink while the device is in recovery
mode.
A solid light indicates that the WPS handshake has been completed. The light will blink while the WPS
handshake is processing.
6D-Link DIR-822 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.
• 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-822 User Manual
Section 2 - Installation
Wireless Installation Considerations
The D-Link wireless router lets you access your network using a wireless connection from virtually anywhere within the
operating range of your wireless network. Keep in mind, however, that the number, thickness and location of walls, ceilings,
or other objects that the wireless signals must pass through, may limit the range. Typical ranges vary depending on the types
of materials and background RF (radio frequency) noise in your home or business. The key to maximizing wireless range is to
follow these basic guidelines:
1. Keep the number of walls and ceilings between the D-Link router and other network devices to a minimum each wall or ceiling can reduce your adapter’s range from 3-90 feet (1-30 meters.) Position your devices so that
the number of walls or ceilings is minimized.
2. Be aware of the direct line between network devices. A wall that is 1.5 feet thick (.5 meters), at a 45-degree angle
appears to be almost 3 feet (1 meter) thick. At a 2-degree angle it looks over 42 feet (14 meters) thick! Position
devices so that the signal will travel straight through a wall or ceiling (instead of at an angle) for better reception.
3. Building materials make a 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 2.4 GHz 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 2.4 GHz 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-822 User Manual
Section 2 - Installation
Manual Setup
1. Turn o and unplug your cable or DSL broadband modem. This is required.
2. Position your router close to your modem and a computer. Place the router in an open area of your intended
work area for better wireless coverage.
3. Unplug the Ethernet cable from your modem (or existing router if upgrading) that is connected to your computer.
Plug it into the LAN port labeled 1 on the back of your router. The router is now connected to your computer.
4. Plug one end of the included blue Ethernet cable that came with your router into the yellow port labeled
INTERNET on the back of the router. Plug the other end of this cable into the Ethernet port on your modem.
5. Reconnect the power adapter to your cable or DSL broadband modem and wait for two minutes.
6. Connect the supplied power adapter into the power port on the back of the router and then plug it into a power
outlet or surge protector. Press the power button and verify that the power LED is lit. Allow 1 minute for the
router to boot up.
7. If you are connecting to a broadband service that uses a dynamic connection (not PPPoE), you may be online
already. Try opening a web browser connecting to a website. If a solid light indicates a connection on the Internet
port, then the router can connect to the Internet.
9D-Link DIR-822 User Manual
Section 3 - Conguration
Conguration
There are several dierent ways you can congure your router to connect to the Internet and connect to your clients:
• D-LinkSetupWizard - This wizard will launch when you log into the router for the rst time. Refer to page 11.
• QRSMobileApp- Use your iPhone, iPad, or iPod Touch to congure your router. Refer to page <OV>.
• Manual Setup - Log into the router and manually congure your router (advanced users only). Refer to page 20.
10D-Link DIR-822 User Manual
Section 3 - Conguration
Quick Setup Wizard
If this is your rst time installing the router, open your web browser.
You will automatically be directed to the Wizard Setup Screen. If
not, enter http://dlinkrouter.local Then, press Enter.
If you have already congured your settings and you would like to
access the conguration utility, please refer to page 20.
If this is your rst time logging into the router, this wizard will start
automatically.
This wizard is designed to guide you through a step-by-step process
to congure your new D-Link router and connect to the Internet.
http://dlinkrouter.local
Click Next to continue.
Please wait while your router detects your internet connection type.
If the router detects your Internet connection, you may need to enter
your ISP information such as username and password.
11D-Link DIR-822 User Manual
Section 3 - Conguration
If the router does not detect a valid Ethernet connection from the
Internet port, this screen will appear. Connect your broadband
modem to the Internet port and then click TryAgain.
If the router detects an Ethernet connection but does not detect the
type of Internet connection you have, this screen will appear. Click
Guide me through the Internet Connection Settings to display a
list of connection types to choose from.
Select your Internet connection type and click Next to continue.
12D-Link DIR-822 User Manual
Section 3 - Conguration
If the router detected or you selected PPPoE, enter your PPPoE
username and password and click Next to continue.
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 the router detected or you selected PPTP, enter your PPTP
username, password, and other information supplied by your ISP.
Click Next to continue.
If the router detected or you selected L2TP, enter your L2TP
username, password, and other information supplied by your ISP.
Click Next to continue.
13D-Link DIR-822 User Manual
Section 3 - Conguration
If the router detected or you selected Static, enter the IP and DNS
settings supplied by your ISP. Click Next to continue.
For both the 2.4 GHz and 5 GHz segments, create a Wi-Fi network
name (SSID) using up to 32 characters.
Create a Wi-Fi password (between 8-63 characters). Your wireless
clients will need to have this passphrase or key entered to be able
to connect to your wireless network.
Click Next to continue.
In order to secure your router, please enter a new password. Check
the Enable Graphical Authentication box to enable CAPTCHA
authentication for added security. Click Next to continue.
14D-Link DIR-822 User Manual
Section 3 - Conguration
Select your time zone from the drop-down menu and click Next
to continue.
The Conrm Wi-Fi Settings window will display your Wi-Fi settings.
Click Save to continue.
If you want to create a bookmark to the router, click OK. Click Cancel
if you do not want to create a bookmark.
If you clicked Yes , a window may appear (depending on what web
browser you are using) to create a bookmark.
15D-Link DIR-822 User Manual
Section 3 - Getting Started
QRS Mobile App
QRS Mobile app allows you to install and congure your router from your mobile device.
Note: The screenshots may be dierent depending on your mobile device’s OS version.
Step 1
Search for the free QRS Mobile App on the iTunes Store or Google Play.
Step 2
Once your app is installed, you may now congure your router. Connect
to the router wirelessly by going to your wireless utility on your device.
Scan for the Wi-Fi name (SSID) as listed on the supplied info card. Select
and then enter your Wi-Fi password.
Step 3
Once you connect to the router, launch the QRS Mobile app from the
Home screen of your device.
Note: The following steps show the Android interface of the QRS Mobile
app. If you are using an iPhone, iPad, or iPod touch, the appearance may be
dierent to that of the screenshots, but the process is the same.
16D-Link DIR-822 User Manual
Section 3 - Getting Started
Step 4
You will see the welcome screen. Tap Start to proceed, then enter your
device password and tap Log In. Tap Next once the Operation Mode
screen appears.
Step 5
At this point, please ensure that your the router is connected to a modem.
Plug one end of the provided Ethernet cable into your DSL or cable
modem, and plug the other end into the port marked INTERNET on the
DIR-860L. Tap Next to automatically detect your Internet connection
and proceed to the next step.
17D-Link DIR-822 User Manual
Section 3 - Getting Started
Step 6
Firstly, enter a network name (SSID) of your choice, or leave it unchanged
to accept the default SSID.
Secondly, choose a Wi-Fi password of at least 8 characters. Any device
trying to connect to the router wirelessly will need to enter this password
the rst time it connects.
Finally, tap Next to proceed.
You will be asked to enter a SSID and password for your 5GHz network.
Repeat step 6 and tap Next to proceed.
Step 7
Enter the administrator password of your choice. Unlike the Wi-Fi
password, this password is only required when you need to congure the
router. See Web-based Conguration Utility on page 20 for details
of when this password is used. Tap Next to proceed.
18D-Link DIR-822 User Manual
Section 3 - Getting Started
Step 8
You will be presented with a summary of your chosen settings.
Tap Save to complete the setup.
Congratulations, your device has been successfully congured! You can
share this information by tapping ShareByNFC, Share By E-mail, or
tap Finish to exit the app.
If you tap ShareByNFC,you can now touch the tag with your other
device until the conrmation message appears.
Note: NFC is not supported by iPhone, iPad, and iPod touch devices.
19D-Link DIR-822 User Manual
Section 3 - Conguration
Web-based Conguration Utility
To access the conguration utility, open a web browser such as
Internet Explorer and enter the address of the router
(http://dlinkrouter.localorhttp://192.168.0.1).
Non-Windows and non-Mac users may also connect by typing
http://192.168.0.1 in the address bar.
Leave the password blank by default.
20D-Link DIR-822 User Manual
Section 3 - Conguration
Internet Connection Setup
If you want to congure your router to connect to the Internet using
the wizard, click InternetConnectionSetupWizard. You will be
directed to the Quick Setup Wizard. See the next page for details.
Click Manual Internet Connection Setup to configure your
connection manually. See Internet (Manual) on page 28 for
details.
21D-Link DIR-822 User Manual
Section 3 - Conguration
Internet Connection Setup Wizard
When conguring the router for the rst time, we recommend
that you use the Internet Connection Setup Wizard, and follow the
instructions on the screen. This wizard is designed to assist the user
with a quick and easy method to congure the Internet connectivity
of this router.
At any time during the Internet Connection Setup Wizard, the user
can click on the Cancel button to discard any changes and return to
the main Internet page. Also the user can click on the Prev button,
to return to the previous window for re-conguration.
Welcome:
This wizard will guide you through a step-by-step process to congure your
new D-Link router and connect to the Internet.
Click Next to continue.
Step 1: Set Your Password
By default, the D-Link router does not have a password congured for
administrator access to the web-based conguration pages. To secure your
new networking device, please enter and verify a password in the spaces
provided. The two passwords must match.
Click Next to continue.
22D-Link DIR-822 User Manual
Section 3 - Conguration
Step 2: Select Your Time Zone
Select the appropriate time zone for your location. This information is
required to congure the time-based options for the router.
Click Next to continue.
Step 3: Internet Connection
Here you will be able to congure the Internet connection used by this
device. If your ISP connection is listed in the drop-down menu select it and
click Next. If your ISP connection is not listed then you can proceed to select
any of the other manual Internet connection methods listed below.
The following parameters will be available for conguration:
DynamicIPAddress: Choose this if your Internet connection
automatically provides you with an IP address.
Most cable modems use this type of
connection.
PPPoE: Choose this option if your Internet connection
requires a PPPoE username and password to
get online. Most DSL modems use this type of
connection.
PPTP: Choose this option if your Internet connection
requires a PPTP username and password to get
online.
L2TP: Choose this option if your Internet connection
requires an L2TP username and password to
get online.
StaticIPAddress: Choose this option if your Internet service
provider provided you with IP address
information that has to be manually
congured.
23D-Link DIR-822 User Manual
Section 3 - Conguration
Step3:InternetConnection(DynamicIPAddress)
After selecting the Dynamic IP Address Internet connection method, the following page will appear.
The following parameters will be available for conguration:
MACAddress: Enter the MAC address of the Internet gateway
(plugged into the Internet port of this device) here.
Clone Button: If the conguration PC also acts as the Internet
gateway, then click on the Clone Your PC’s MAC
Address button to copy the PC’s MAC address into
the space provided. If you’re not sure, leave the
MAC Address eld blank.
Host Name: Enter the host name used here. If you do not have
or know this information, please contact your ISP.
PrimaryDNSAddress: Enter the Primary DNS IP address used here.
SecondaryDNSAddress: Enter the Secondary DNS IP address used here. This
eld is normally optional. Only one DNS address is
required for a functional Internet connection, but
using a second DNS address provides more
stability.
Click Next to continue.
Step 3: Internet Connection (PPPoE)
After selecting the PPPoE Internet connection method, the following page
will appear:
The following parameters will be available for conguration:
User Name: Enter the PPPoE account user name used here. This
information is given by the ISP.
Password: Enter the PPPoE account password used here. This
information is given by the ISP.
Click Next to continue.
24D-Link DIR-822 User Manual
Section 3 - Conguration
Step 3: Internet Connection (PPTP)
After selecting the PPTP Internet connection method, the following page
will appear:
The following parameters will be available for conguration:
AddressMode: Here the user can specify whether this Internet
connection requires the use of a Dynamic or
Static IP address. PPTP usually requires a
dynamic IP conguration.
PPTPIPAddress: Enter the PPTP IP address used here. This op-
tion is only available if Static IP is selected.
PPTP Subnet Mask: Enter the PPTP subnet mask used here.
PPTPGatewayIPAddress: Enter the PPTP gateway IP address used here.
PPTPServerIPAddress: Enter the PPTP server IP address used here.
This is normally the same as the PPTP gateway
IP address.
User Name: Enter the PPTP username used here.
Password: Enter the PPTP password used here.
Verify Password: Re-enter the PPTP password used here.
PrimaryDNSAddress: Enter the primary DNS IP address used here.
SecondaryDNSAddress: Enter the secondary DNS IP address used here.
This eld is normally optional. Only one DNS
address is required for a functional Internet
connection, but using a second DNS address
provides more stability.
Click Next to continue.
25D-Link DIR-822 User Manual
Section 3 - Conguration
Step 3: Internet Connection (L2TP)
After selecting the L2TP Internet connection method, the following page
will appear:
The following parameters will be available for conguration:
AddressMode: Here the user can specify whether this Internet
connection requires the use of a dynamic or
static IP address. L2TP usually requires a
dynamic IP conguration.
L2TPIPAddress: Enter the L2TP IP address used here. This
option is only available if Static IP is selected.
L2TP Subnet Mask: Enter the L2TP subnet mask used here.
L2TPGatewayIPAddress: Enter the L2TP gateway IP address used here.
L2TPServerIPAddress: Enter the L2TP server IP address used here.
This is normally the same as the L2TP gateway
IP address.
User Name: Enter the L2TP username used here.
Password: Enter the L2TP password used here.
Verify Password: Re-enter the L2TP password used here.
PrimaryDNSAddress: Enter the primary DNS IP address used here.
SecondaryDNSAddress: Enter the secondary DNS IP address used here.
This eld is normally optional. Only one DNS
address is required for a functional Internet
connection, but using a second DNS address
provides more stability.
Click Next to continue.
26D-Link DIR-822 User Manual
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