Comtrend Corporation ER-5845n User manual

Contents
CHAPTER 1 PRODUCT INTRODUCTION......................1
1.1 Package Contents ..................................1
1.2 LED Indicators and Port Description..........1
CHAPTER 2 PRODUCT INSTALLATION........................4
CHAPTER 3 HOW TO CONFIGURE TOACCESS THE
INTERNET.............................................................................6
3.1 How to Set the Network Configurations.....6
3.2 Log in to the Router ............................. 11
3.3 Fast Internet Access............................. 11
3.4 Fast Encryption.................................... 11
CHAPTER 4 ADVANCED SETTINGS..............................13
4.1 System Status..................................... 13
4.2 WAN Settings...................................... 14
4.3 LAN Settings....................................... 16
4.4 DNS Settings....................................... 16
4.5 WAN Medium Type ............................... 17
4.6 Bandwidth Control ............................... 18
4.7 Traffic Statistics................................... 19
CHAPTER 5 WLAN SETTINGS .......................................20
5.1 Wireless Basic Settings......................... 20
5.2 Wireless Security Settings..................... 21
5.2.1 WPS Settings.................................... 22
5.2.2 WPA- PSK ........................................ 22
5.2.3 WPA2- PSK....................................... 23
5.3 Wireless Access Control ........................ 23
5.4 Connection Status................................ 23

CHAPTER 6 DHCPSERVER.............................................24
6.1 DHCP Server....................................... 24
6.2 DHCP Client List................................... 24
CHAPTER 7 VIRTUALSERVER......................................25
7.1 Port Range Forwarding.......................... 25
7.2 DMZ Settings ...................................... 27
7.3 UPNP Settings ..................................... 27
CHAPTER 8 SECURITY SETTINGS ...............................29
8.1 Client Filter Settings............................. 29
8.2 MAC Address Filter............................... 30
8.3 URL Filter Settings ............................... 30
8.4 Remote Web Management..................... 31
CHAPTER 9 ROUTING SETTINGS.................................32
9.1 Routing Table ...................................... 32
9.2 Static Routing...................................... 32
CHAPTER 10 SYSTEM TOOLS........................................33
10.1 TIME SETTINGS ..................................... 33
10.2 DDNS............................................... 33
10.3 Backup/Restore ................................. 34
10.4 Restore to Factory Default ................... 35
10.5 Upgrade............................................ 35
10.6 Reboot the Router.............................. 36
10.7 Password Change............................... 36
10.8 Syslog.............................................. 36
10.9 Log out............................................. 36
APPENDIX 1 GLOSSARY..................................................37
APPENDIX 2 PRODUCT FEATURES..............................38
APPENDIX 3 FAQ ...............................................................39

APPENDIX 4 CLEAR WIRELESS CONFIGURATION.41
APPENDIX 5 REGULATORY INFORMATION .............43

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Chapter 1 Product Introduction
Thank you for purchasing the ER-5840n/ER-5845n Wireless N Broadband Router!
This easy-to-use router provides simple configuration interface which enables you to
configure it with ease. It is based on the latest IEEE802.11n standard, and is backward
compatible with devices of IEEE802.11b/g standards.
The ER-5840n/ER-5845n wireless router，including router, wireless AP, four-port switch and
firewall in one，provides powerful online monitor function and supports URL filter and MAC
filter. With WDS function, it can repeat and amplify wireless signals so as to enlarge
network coverage area. It truly supports UPnP and WMM to make your audio and video
smoother. With QoS function, it can efficiently distribute the downloading rate for the clients.
With super compatibility, the router can break the access limits in some areas so that
multiple computers can share the Internet access.Additionally, it supports WISP function to
access to the ISP’s wireless hotspots (this function applies only to some of the products).
1.1 Package Contents
Please verify the following items after you open the package:
¾One Wireless N Broadband Router
¾One Quick Installation Guide
¾One Power Adapter
¾One Software CD
If any of the listed items are missing or damaged, please contact the ER-5840n/ER-5845n
reseller for immediate replacement.
1.2 LED Indicators and Port Description
Panel and LED indicators show:
LED indicator description on the front panel

2
Back panel port show (take ER-5840N/ER-5845N as an example)

3
Back panel port description

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Chapter 2 Product Installation
In this user guide, we take ER-5840N/ER-5845N as an example to explain the installation
steps. The installation steps of other products are similar to this one.
1. Please use only the included power adapter to power your router. (NOTE: Use of an
unmatched power adapter could cause damage to this product).
2. Please connect the router’s LAN port to your computer with an Ethernet cable as shown
below.
3. Please connect your broadband line provided by your ISP to the router’s WAN port.

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4. Insert the included software CD into the CD drive of your computer. After the software
automatically initiates, double click the “Setup” icon and follow the instructions to complete
the installation. You can also enter the router’s Web-based Utility to complete the
configuration.

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Chapter 3 How to configure to access the Internet
3.1 How to Set the Network Configurations
Network Configurations under windows XP
1. Right click “My Network Places” on your computer desktop and select “Properties”.
2. Right click “Local Area Connection” and select “Properties”.
3. Select “Internet Protocol (TCP/IP)” and click “Properties”.

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4. Select “Obtain an IP address automatically” and “Obtain DNS server address
automatically”. Click “OK” to save the configurations.
Or select “Use the following IP address” and enter the IP address, Subnet mask, Default
gateway as follows:
¾IP Address: 192.168.0.XXX: (XXX is a number from 2~254)
¾Subnet Mask: 255.255.255.0
¾Gateway: 192.168.0.1
¾DNS server: You should input the DNS server address provided by your ISP.
Otherwise, you can enter 192.168.0.1. Click “OK” to save the configurations.

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Network Configurations under windows 7
1. Click the network icon on the lower right corner of your computer desktop, and then
click” Open Network and Sharing Center”.
2. Click “Change adapter settings” on the left side of the window.

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3. Right click “LocalArea Connection” and select “Properties”.
4. Double click” Internet Protocol Version 4(TCP/IPv4)".
5. Select “Obtain an IP address automatically” and “Obtain DNS server address

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automatically”. Click “OK” to save the configurations.
Or select “Use the following IP address” and enter the IP address, Subnet mask, Default
gateway as follows:
¾IP Address: 192.168.0.XXX: (XXX is a number from 2~254)
¾Subnet Mask: 255.255.255.0
¾Gateway: 192.168.0.1
¾DNS server: You should input the DNS server address provided by your ISP.
Otherwise, you can enter 192.168.0.1. Click “OK” to save the configurations.

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3.2 Log in to the Router
1. To access the Router’s Web-based Utility, launch a web browser such as Internet
Explorer or Firefox and enter http://192.168.0.1. Press “Enter”.
2. The system will automatically choose the corresponding web language in accordance
with the Browser’s language. For example, if your Browser’s language is French, the
router’s web language will display as French.
3. If your Browser language is English or beyond the 9 languages (Arabic, French, German,
Italian, Polish, Portuguese, Russian, Spanish, Turkish), the router’s web language will be
English.
3.3 Fast Internet Access
Two kinds of fast access methods are provided on the router’s web-based utility: ADSL
dial-up and DHCP.
If you select ADSL dial-up, you only need to enter the access account and access
password as well as the wireless password, and then click “Ok” to complete the settings.
If you select DHCP, you only need to enter the wireless password and click “Ok” to
complete the settings.
The default access method is ADSL dial-up and the access account and access password
are the same as the ADSL dial-up account and password, which you can inquire your
broadband ISP. For other access methods, please refer to WAN settings in chapter 4.The
wireless password can only consist of 8 characters, the default is 12345678 and you can
modify it when necessary.
3.4 Fast Encryption

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The router provides two encryption setting screens, one is simple and easy, the other is
advanced (For advanced setting, please refer to chapter 5.2).
Simple and easy screen:
Log on to the router’s web-based utility and you may set encryption for the router. The
default adopts WPA-PSK mode and AES Algorithm. The default password is 12345678, as
shown below.
NOTE: The wireless password can only be 8 characters in length and the default
is 12345678, you can modify it when necessary.

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Chapter 4 Advanced Settings
4.1 System Status
System status screen allows you to view the router’s WAN port status and system status.
¾Connection status: It displays the router’s WAN connection status.
Disconnected: It indicates the router’s WAN port hasn’t been connected with the
network cable.
Connecting: It indicates the router’s WAN port is obtaining IP address.
Connected: It indicates the Router is well connected with the ISP.
¾WAN IP：IP address obtained from ISP.
¾Subnet mask: Obtained from ISP.
¾Gateway: Obtained from ISP.
¾DNS server: Obtained from ISP.
¾Alternate DNS server: Obtained from ISP.
¾Connection type: It displays your current access method.
¾LAN MAC address：It displays the Router’s LAN MAC address.
¾WAN MAC address：It displays the Router’s WAN MAC Address.

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¾System time：It displays the system’s updated time
¾Connected client ：It displays the number of the connected computers(normally it
displays the number of clients whose IP addresses obtained via DHCP server)
¾Software version：It displays the Router’s software version；
¾Hardware version：It displays the Router’s hardware version.
4.2 WAN Settings
Virtual Dial-up (PPPoE)
¾Mode: Show your current connection mode.
¾Access Account: Enter the account provided by your ISP.
¾Access Password: Enter the password provided by your ISP.
¾MTU: Maximum Transmission Unit. It is the size of the largest data packet that can
be sent over the network. The default value is 1492. Do NOT modify it unless
necessary, but if a specific website or web application software cannot open or be
enabled, you can try to change the MTU value to 1450, 1400, etc.
¾Service Name: The connection name for current PPPOE, enter it if necessary，
otherwise, leave it blank.
¾AC Name: The service name, enter it if necessary，otherwise, leave it blank.
¾Connect Automatically: Connect automatically to the Internet after rebooting the
system or connection failure.
¾Connect on Demand: Re-establish your connection to the Internet after the specific
time (Max Idle Time). Zero means you are connected to the Internet all times.
Otherwise, enter the minutes to be elapsed before you are disconnected from the
Internet.
¾Connect Manually: Connect to the Internet by users manually.
¾Connect on Fixed Time: Connect to the Internet during the time you fix
automatically.
NOTE:
The “Connect on Fixed Time” goes into effect only when you have set the current
time in “Time settings” from “System tools”.
Static IP
If your ISP provides you the static IP, please choose static IP, and you need to enter the IP
address, subnet mask, gateway, DNS server and alternate DNS server provided by your

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ISP or network administrator。
¾Mode: Show your current connection mode.
¾IP address: Enter the WAN IP address provided by your ISP. If you are not clear,
please inquire your local ISP.
¾Subnet mask: Enter the WAN Subnet Mask provided by your ISP. Generally it is
255.255.255.0。
¾Gateway: Enter the Gateway provided by your ISP. If you are not clear, please
inquire your local ISP.
¾DNS server: Enter the necessary DNS server provided by your ISP.
¾Alternate DNS server: Enter the second DNS address if your ISP provides, which is
optional.
Dynamic IP (Via DHCP)
If your connection mode is Dynamic IP, it means every time you access the Internet, you
will get a different IP. You don’t need to enter any parameters in this mode, just Click “Ok” to
finish the settings.
PPTP
¾Mode: Show your current connection mode.
¾PPTP server address: The IP address or domain name of the destination server
and it is used to specify the destination address which needs for PPTP connection.
¾Username/Password: Used to validate identity when connecting to the PPTP
server.
¾Address mode: Set the router’s IP address mode, you can select either “Dynamic”
or “Static”. If your ISP doesn’t provide the IP address, please select “Dynamic”.
¾IP address: Please enter the IP address provided by your ISP, inquire your local ISP
if you are not clear.
¾Subnet mask: Please enter the subnet mask provided by your ISP ,generally its
255.255.255.0
¾Gateway: Please enter the gateway provided by your ISP, inquire your local ISP if
you are not clear.
All the above parameters are provided by ISP.

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L2TP
¾Mode: Show your current connection mode.
¾L2TP server address: The IP address or domain name of the destination server and
it is used to specify the destination address which needs for L2TP connection.
¾Username/Password: Used to validate identity when connecting to the L2TP
server.
¾Address mode: Set the router’s IP address mode, you can select either “Dynamic”
or “Static”. If your ISP doesn’t provide the IP address, please select “Dynamic”.
¾IP address: Please enter the IP address provided by your ISP, inquire your local ISP
if you are not clear.
¾Subnet mask: Please enter the subnet mask provided by your ISP ,generally its
255.255.255.0
¾Gateway: Please enter the gateway provided by your ISP, inquire your local ISP if
you are not clear.
All the above parameters are provided by ISP.
4.3 LAN Settings
Click “Advanced settings” –LAN settings to enter the following screen.
¾LAN MAC address: The Router’s LAN MAC address, which is unchangeable.
¾IP address: The Router’s LAN IP address (not your PC’s IP address).The default
value is 192.168.0.1; you can change it when necessary.
¾Subnet mask: The Router’s LAN subnet mask. The default value is 255.255.255.0
NOTE:
Once you modify the IP address, you need to remember it for next time you log in to
the web-based utility.
4.4 DNS Settings
DNS stands for Domain Name System (or Service).
¾DNS setting: Select to enable the DNS server.
¾Primary DNS address: Enter the necessary address provided by your ISP.