Comtrend Corporation AR-5381u User manual

AR-5381u
ADSL2+ WLAN Router
User Manual
261056-074
Version A2.3, May 9, 2016

1
Preface
This manual provides information related to the installation and operation of this
device. The individual reading this manual is presumed to have a basic
understanding of telecommunications terminology and concepts.
If you find the product to be inoperable or malfunctioning, please contact technical
support for immediate service by email at INT[email protected]
For product update, new product release, manual revision, or software upgrades,
please visit our website at http://www.comtrend.com
Important Safety Instructions
With reference to unpacking, installation, use, and maintenance of your electronic
device, the following basic guidelines are recommended:
 Do not use or install this product near water, to avoid fire or shock hazard. For
example, near a bathtub, kitchen sink or laundry tub, or near a swimming pool.
Also, do not expose the equipment to rain or damp areas (e.g. a wet basement).
 Do not connect the power supply cord on elevated surfaces. Allow it to lie freely.
There should be no obstructions in its path and no heavy items should be placed
on the cord. In addition, do not walk on, step on, or mistreat the cord.
 Use only the power cord and adapter that are shipped with this device.
 To safeguard the equipment against overheating, make sure that all openings in
the unit that offer exposure to air are not blocked.
 Avoid using a telephone (other than a cordless type) during an electrical storm.
There may be a remote risk of electric shock from lightening. Also, do not use
the telephone to report a gas leak in the vicinity of the leak.
 Never install telephone wiring during stormy weather conditions.
CAUTION:
 To reduce the risk of fire, use only No. 26 AWG or larger
telecommunication line cord.
 Always disconnect all telephone lines from the wall outlet before servicing
or disassembling this equipment.
WARNING
 Disconnect the power line from the device before servicing.
 Power supply specifications are clearly stated in Appendix B -
Specifications.

2
FCC & ISED
User Information
Any changes or modifications not expressly approved by the party responsible for
compliance could void your authority to operate the equipment.
Aucune modification apportée à l’appareil par l’utilisateur, quelle qu’en soit la nature.
Tout changement ou modification peuvent annuler le droit d’utilisation de l’appareil
par l’utilisateur.
Note: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions,
may cause harmful interference to radio communications. However, there is no
guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to
try to correct the interference by one or more of the following measures:
—Reorient or relocate the receiving antenna.
—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.
This Class B digital apparatus complies with Canadian ICES-003.
To reduce potential radio interference to other users, the antenna type and
its gain should be so chosen that the equivalent isotropically radiated power
(e.i.r.p.) is not more than that permitted for successful communication.
This device complies with Part 15 of the FCC Rules and Industry Canada
licence-exempt RSS standard(s).
Operation is subject to the following two conditions:
1. This device may not cause interference, and
2. This device must accept any interference, including interference that may
cause undesired operation of the device.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 Canada.
Pour réduire le risque d’interférence aux autres utilisateurs, le type d’antenne
et son gain doivent être choisies de façon que la puissance isotrope
rayonnée équivalente (PIRE) ne dépasse pas ce qui est nécessaire pour une
communication réussie.
Cet appareil est conforme à la norme RSS Industrie Canada exempts de licence
norme(s).
Son fonctionnement est soumis aux deux conditions suivantes:
1. Cet appareil ne peut pas provoquer d’interférences et
2. Cet appareil doit accepter toute interférence, y compris les interférences
qui peuvent causer un mauvais fonctionnement du dispositif.

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Radiation Exposure
FCC
1. This Transmitter must not be co‐located or operating in conjunction with any
other antenna or transmitter.
2. This equipment complies with FCC RF radiation exposure limits set forth for an
uncontrolled environment. This equipment should be installed and operated with a
minimum distance of 20 centimeters between the radiator and your body.
ISED
This device complies with the ISED radiation exposure limit set forth for an
uncontrolled environment. This device should be installed and operated with
minimum distance 20cm between the radiator & your body. This transmitter must
not be co-located or operating in conjunction with any other antenna or transmitter.
Cet équipement est conforme avec l'exposition aux radiations ISED définies pour un
environnement non contrôlé. Cet équipement doit être installé et utilisé à une
distance minimum de 20 cm entre le radiateur et votre corps. Cet émetteur ne doit
pas être co-localisées ou opérant en conjonction avec une autre antenne ou
transmetteur.
Copyright
Copyright© 2016 Comtrend Corporation. All rights reserved. The information
contained herein is proprietary to Comtrend Corporation. No part of this document
may be translated, transcribed, reproduced, in any form, or by any means without
the prior written consent of Comtrend Corporation.
This program is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/
NOTE: This document is subject to change without notice.

4
Protect Our Environment
This symbol indicates that when the equipment has reached the end of
its useful life, it must be taken to a recycling centre and processed
separate from domestic waste.
The cardboard box, the plastic contained in the packaging, and the parts that make
up this router can be recycled in accordance with regionally established regulations.
Never dispose of this electronic equipment along with your household waste; you
may be subject to penalties or sanctions under the law. Instead, please be
responsible and ask for disposal instructions from your local government.

5
Table of Contents
CHAPTER 1 INTRODUCTION...........................................................................................................8
CHAPTER 2 INSTALLATION.............................................................................................................9
2.1 HARDWARE SETUP...........................................................................................................................9
2.2 LED INDICATORS...........................................................................................................................11
CHAPTER 3 WEB USER INTERFACE............................................................................................13
3.1 DEFAULT SETTINGS .......................................................................................................................13
3.2 IP CONFIGURATION........................................................................................................................13
3.3 LOGIN PROCEDURE........................................................................................................................16
CHAPTER 4 DEVICE INFORMATION...........................................................................................18
4.1 WAN.............................................................................................................................................19
4.2 STATISTICS.....................................................................................................................................20
4.2.1 LAN Statistics......................................................................................................................20
4.2.2 WAN Service Statistics ........................................................................................................21
4.2.3 xTM Statistics......................................................................................................................22
4.2.4 xDSL Statistics ....................................................................................................................23
4.3 ROUTE...........................................................................................................................................27
4.4ARP...............................................................................................................................................28
4.5 DHCP............................................................................................................................................29
4.5.1 DHCPv4 ................................................................................................................................29
4.5.2 DHCPv6 ................................................................................................................................30
4.6 NAT SESSION ................................................................................................................................31
4.7 IGMPPROXY ................................................................................................................................32
4.8 IPV6 ..............................................................................................................................................33
4.8.1 IPv6 Info................................................................................................................................33
4.8.2 IPv6 Neighbor .......................................................................................................................34
4.8.3 IPv6 Route .............................................................................................................................35
CHAPTER 5 ADVANCED SETUP.....................................................................................................36
5.1 LAYER 2INTERFACE ......................................................................................................................36
5.1.1 ATM Interface.....................................................................................................................36
5.1.2 PTM Interface.....................................................................................................................36
5.1.3 ETH Interface .....................................................................................................................37
5.2 WAN SERVICE...............................................................................................................................38
5.3 LAN..............................................................................................................................................39
5.3.1 LAN IPv6 Autoconfig.............................................................................................................42
5.3.2 Static IP Neighbor .................................................................................................................45
5.4AUTO-DETECTION .........................................................................................................................46
5.5 NAT ..............................................................................................................................................50
5.5.1 Virtual Servers ....................................................................................................................50
5.5.2 Port Triggering ...................................................................................................................52
5.5.3 DMZ Host ...........................................................................................................................54
5.5.4 IP Address Map...................................................................................................................55
5.5.5 IPSEC ALG.........................................................................................................................57
5.5.6 SIP ALG..............................................................................................................................58
5.6 SECURITY ......................................................................................................................................59
5.6.1 IP Filtering .........................................................................................................................59
5.6.2 MAC Filtering.....................................................................................................................62
5.7 PARENTAL CONTROL......................................................................................................................64
5.7.1 Time Restriction..................................................................................................................64
5.7.2 URL Filter...........................................................................................................................65
5.8 QUALITY OF SERVICE (QOS)..........................................................................................................67
5.8.1 Queue Management Configuration.....................................................................................67
5.8.2 QoS Queue Setup................................................................................................................68
5.8.3 QoS Policer.........................................................................................................................70
5.8.4 QoS Classification..............................................................................................................72
5.9 ROUTING .......................................................................................................................................75

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5.9.1 Default Gateway.................................................................................................................75
5.9.2 Static Route.........................................................................................................................76
5.9.3 Policy Routing ....................................................................................................................77
5.9.4 RIP......................................................................................................................................79
5.10 DNS............................................................................................................................................80
5.10.1 DNS Server .........................................................................................................................80
5.10.2 Dynamic DNS .....................................................................................................................81
5.10.3 DNS Entries.........................................................................................................................83
5.11 DSL.............................................................................................................................................84
5.12 UPNP...........................................................................................................................................86
5.13 DNS PROXY/RELAY ....................................................................................................................87
5.14 PRINT SERVER .............................................................................................................................88
5.15 DLNA.........................................................................................................................................89
5.16 STORAGE SERVICE.......................................................................................................................90
5.17 INTERFACE GROUPING.................................................................................................................91
5.18 IPTUNNEL...................................................................................................................................94
5.18.1 IPv6inIPv4...........................................................................................................................94
5.18.2 IPv4inIPv6...........................................................................................................................96
5.19 IPSEC ..........................................................................................................................................98
5.20 CERTIFICATE..............................................................................................................................101
5.20.1 Local.................................................................................................................................101
5.20.2 Trusted CA ........................................................................................................................104
5.21 MULTICAST................................................................................................................................106
CHAPTER 6 WIRELESS..................................................................................................................108
6.1 BASIC ..........................................................................................................................................108
6.2 SECURITY ....................................................................................................................................110
6.2.1 WPS .....................................................................................................................................113
6.3 MAC FILTER ...............................................................................................................................116
6.4 WIRELESS BRIDGE.......................................................................................................................117
6.5ADVANCED ..................................................................................................................................118
6.6 SITE SURVEY ...............................................................................................................................121
6.7 STATION INFO ..............................................................................................................................123
6.8 WIFI BUTTON..............................................................................................................................124
CHAPTER 7 DIAGNOSTICS...........................................................................................................125
7.1 DIAGNOSTICS –INDIVIDUAL TESTS .............................................................................................125
7.2 FAULT MANAGEMENT..................................................................................................................126
7.3 UPTIME STATUS ...........................................................................................................................127
CHAPTER 8 MANAGEMENT ........................................................................................................128
8.1 SETTINGS.....................................................................................................................................128
8.1.1 Backup Settings.................................................................................................................128
8.1.2 Update Settings.................................................................................................................128
8.1.3 Restore Default .................................................................................................................129
8.2 SYSTEM LOG ...............................................................................................................................130
8.3 SNMPAGENT .............................................................................................................................132
8.4 TR-069 CLIENT ...........................................................................................................................133
8.5 INTERNET TIME ...........................................................................................................................135
8.6ACCESS CONTROL .......................................................................................................................136
8.6.1 Accounts............................................................................................................................136
8.6.2 Service Access...................................................................................................................138
8.6.3 IP Address.........................................................................................................................139
8.7 UPDATE SOFTWARE .....................................................................................................................141
8.8 REBOOT.......................................................................................................................................142
APPENDIX A - FIREWALL .............................................................................................................143
APPENDIX B - SPECIFICATIONS.................................................................................................146
APPENDIX C - SSH CLIENT ..........................................................................................................148

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APPENDIX D - CONNECTION SETUP.........................................................................................149
APPENDIX E - PRINTER SERVER................................................................................................199

8
Chapter 1 Introduction
The AR-5381u is an 802.11n (300Mbps) Wireless ADSL2+ router. AR-5381u
has four 10/100 Base-T Ethernet ports, a Wi-Fi Protected Setup (WPS) button
and a Wi-Fi switch button, one USB Host, and is backward compatible with
existing 802.11b (11Mbps) and 11g (54bps) equipment.
The AR-5381u ADSL2+ router also provides state of the art security features
such as 64/128 bit WEP encryption and WPA/WPA2 encryption, Firewall, and
VPN pass through. The AR-5381u is designed for both residential and business
applications that require wireless and wired connectivity to an ADSL
broadband network. The AR-5381u supports up to 16 contiguous virtual
connections allowing for multiple simultaneous Internet connections. The
AR-5381u is also designed with TR-068 compliant color panel, which eases the
installation of the modem and makes it more user-friendly.

9
Chapter 2 Installation
2.1 Hardware Setup
Follow the instructions below to complete the hardware setup.
BACK PANEL
The figure below shows the back panel of the device.
DSL
Connect to the DSL port with the DSL RJ11 cable.
Ethernet (LAN) Ports
You can connect the router to up to four LAN devices using RJ45 cables. The ports
are auto-sensing MDI/X and either straight-through or crossover cable can be used.
USB Host Port (Type A)
This port can be used to connect the router to the print server.
Power ON
Press the power button to the OFF position (OUT). Connect the power adapter to the
power port. Attach the power adapter to a wall outlet or other AC source. Press the
power button to the ON position (IN). If the Power LED displays as expected then
the device is ready for setup (see section 2.2 LED Indicators).
Caution 1: If the device fails to power up, or it malfunctions, first verify that the
power cords are connected securely and then power it on again. If the
problem persists, contact technical support.
Caution 2: Before servicing or disassembling this equipment, disconnect all power
cords and telephone lines from their outlets.
Reset Button
Restore the default parameters of the device by pressing the Reset button for 10
seconds. After the device has rebooted successfully, the front panel should display
as expected (see section 2.2 LED Indicators for details).
NOTE: If pressed down for more than 60 seconds, the AR-5381u will go into a
firmware update state (CFE boot mode). The firmware can then be
updated using an Internet browser pointed to the default IP address.

10
FRONT PANEL
The Wi-Fi & WPS buttons are located on the bottom-left of the front panel, as shown.
WiFi Button
Press this button for more than 3 seconds to enable/disable the wireless LAN
(WLAN).
WPS Button
Press this button to begin searching for WPS clients. These clients must also enable
WPS push button mode (see 6.2.1 WPS for instructions).

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2.2 LED Indicators
The front panel LED indicators are shown below and explained in the following table.
This information can be used to check the status of the device and its connections.
LED
Color
Mode
Function
POWER
Green
On
The device is powered up.
Off
The device is powered down.
Blink
Upgrade is in process.
Red
On
POST (Power On Self Test) failure or other
malfunction1.
ETH 1 to 4
Green
On
An Ethernet Link is established.
Off
An Ethernet Link is not established.
Blink
Data transmitting or receiving over
Ethernet.
WPS
Green
On
WPS enabled and PC connected to WLAN
Off
WPS disenabled when WPS
configured
After clients connected to router
about 5 minutes, LED is off
Wi-Fi
Green
On
The wireless module is ready.
(i.e. installed and enabled).
Off
The wireless module is not ready.
(i.e. either not installed or disabled).
Blink
Data transmitting or receiving over WLAN.
DSL
Green
On
The DSL Link is established.
Off
Modem is powered off.
Blink
fast: xDSL Link is training or data
transmitting.
slow: xDSL training failed.
INTERNET
Green
On
IP connected and no traffic detected 2.
Off
Modem power off or modem in bridged
mode.
Blink
IP connected and IP Traffic is passing
through the device (either direction).

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1A malfunction is any error of internal sequence or state that will prevent the device
from connecting to the DSLAM or passing customer data. This may be identified at
various times such after power on or during operation through the use of self testing
or in operations which result in a unit state that is not expected or should not occur.
2IP connected (the device has a WAN IP address from IPCP or DHCP and DSL is up
or a static IP address is configured, PPP negotiation has successfully complete –if
used –and DSL is up ) and no traffic detected. If the IP or PPPoE session is dropped
for any other reason, the light is turned off. The light will turn red when it attempts
to reconnect and DHCP or PPPoE fails.

13
Chapter 3 Web User Interface
This section describes how to access the device via the web user interface (WUI)
using an Internet browser such as Internet Explorer (version 5.0 and later).
3.1 Default Settings
The factory default settings of this device are summarized below.
 LAN IP address: 192.168.1.1
 LAN subnet mask: 255.255.255.0
 Administrative access (username: root , password: 12345 )
 WIFI access: enabled
Technical Note
During power on, the device initializes all settings to default values. It will then
read the configuration profile from the permanent storage section of flash memory.
The default attributes are overwritten when identical attributes with different values
are configured. The configuration profile in permanent storage can be created via
the web user interface or telnet user interface, or other management protocols.
The factory default configuration can be restored either by pushing the reset button
for more than ten seconds until the power indicates LED blinking or by clicking the
Restore Default Configuration option in the Restore Settings screen.
3.2 IP Configuration
DHCP MODE
When the AR-5381u powers up, the onboard DHCP server will switch on. Basically,
the DHCP server issues and reserves IP addresses for LAN devices, such as your PC.
To obtain an IP address from the DCHP server, follow the steps provided below.
NOTE: The following procedure assumes you are running Windows. However,
the general steps involved are similar for most operating systems (OS).
Check your OS support documentation for further details.
STEP 1: From the Network Connections window, open Local Area Connection (You
may also access this screen by double-clicking the Local Area Connection
icon on your taskbar). Click the Properties button.
STEP 2: Select Internet Protocol (TCP/IP) and click the Properties button.
STEP 3: Select Obtain an IP address automatically as shown below.

14
STEP 4: Click OK to submit these settings.
If you experience difficulty with DHCP mode, you can try static IP mode instead.

15
STATIC IP MODE
In static IP mode, you assign IP settings to your PC manually.
Follow these steps to configure your PC IP address to use subnet 192.168.1.x.
NOTE: The following procedure assumes you are running Windows. However,
the general steps involved are similar for most operating systems (OS).
Check your OS support documentation for further details.
STEP 1: From the Network Connections window, open Local Area Connection (You
may also access this screen by double-clicking the Local Area Connection
icon on your taskbar). Click the Properties button.
STEP 2: Select Internet Protocol (TCP/IP) and click the Properties button.
STEP 3: Change the IP address to the 192.168.1.x (1<x<255) subnet with subnet
mask of 255.255.255.0. The screen should now display as shown below.
STEP 4: Click OK to submit these settings.

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3.3 Login Procedure
Perform the following steps to login to the web user interface.
NOTE: The default settings can be found in 3.1 Default Settings.
STEP 1: Start the Internet browser and enter the default IP address for the device
in the Web address field. For example, if the default IP address is
192.168.1.1, type http://192.168.1.1.
NOTE: For local administration (i.e. LAN access), the PC running the browser
must be attached to the Ethernet, and not necessarily to the device.
For remote access (i.e. WAN), use the IP address shown on the Chapter 4
Device Information screen and login with remote username and
password.
STEP 2: A dialog box will appear, such as the one below. Enter the default
username and password, as defined in section 3.1 Default Settings.
Click OK to continue.
NOTE: The login password can be changed later (see 8.6.1 Accounts).

17
STEP 3: After successfully logging in for the first time, you will reach this screen.

18
Chapter 4 Device Information
The web user interface window is divided into two frames, the main menu (at left)
and the display screen (on the right). The main menu has several options and
selecting each of these options opens a submenu with more selections.
NOTE: The menu items shown are based upon the configured connection(s) and
user account privileges. For example, if NAT and Firewall are enabled, the
main menu will display the NAT and Security submenus. If either is
disabled, their corresponding menu(s) will also be disabled.
Device Info is the first selection on the main menu so it will be discussed first.
Subsequent chapters will introduce the other main menu options in sequence.
The Device Info Summary screen displays at startup.
This screen shows hardware, software, IP settings and other related information.

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4.1 WAN
Select WAN from the Device Info submenu to display the configured PVC(s).
Heading
Description
Interface
Name of the interface for WAN
Description
Name of the WAN connection
Type
Shows the connection type
VlanMuxId
Shows 802.1Q VLAN ID
IPv6
Shows WAN IPv6 address
IGMP
Shows Internet Group Management Protocol (IGMP) status
MLD
Shows Multicast Listener Discovery (MLD) status
NAT
Shows Network Address Translation (NAT) status
Firewall
Shows the status of Firewall
Status
Lists the status of DSL link
IPv4 Address
Shows WAN IPv4 address
IPv6 Address
Shows WAN IPv6 address