D-Link Router DIR-120 User Manual

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
5 
Connecting the Router 
The Router provides the connection between two networks, a private Ethernet LAN and the public Internet (WAN). Choose a location for the Router where Ethernet devices 
can be connected to the LAN ports and the WAN port can be connected to the cable modem or DSL modem that provides the broadband Internet connection.  
The Router, and all electrical devices should be protected from dust, water, moisture and heat. Make sure network cables, power adapters and power cords are placed safely out 
of the way so they do not create a tripping hazard. As with any electrical appliance, observe common sense safety procedures. 
Place the Router on a shelf, desktop, or other stable platform. Ideally you should be able to view the LED indicators on the front panel. 
 Connect Router to Ethernet LAN The Router can be connected to computers or other Ethernet devices using the four Ethernet LAN ports on the rear panel. Any connection to an Ethernet concentrating device 
such as a switch or hub must operate at a speed of 10/100 Mbps only. When connecting the Router to any Ethernet device capable of operating at speeds between 10~100Mbps, 
be sure that the device has auto-negotiation (NWay) enabled for the connecting port. Use standard CAT5 or better Ethernet cable with RJ-45 connectors. The Ethernet LAN 
ports are auto MDI-II/MDI-X so you can use straight-through or crossover Ethernet cabling.  
The rules governing Ethernet cable lengths apply to the LAN to Router connection. Be sure the Ethernet cables connected to the LAN ports do not exceed 100 meters in length.   
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
6 
Power On Router To power on the Router: 
1. Insert the AC Power Adapter cord into the power receptacle located on the rear panel of 
the Router and plug the adapter into a suitable nearby power source. See the back panel 
illustration above to view the power receptacle. 
2. The Power LED indicator will immediately light green and remain lit. The Status LED 
should light steady green initially and begin to blink after a few seconds. 
3. If you have the Router connected to your network you can look at the Ethernet Link/Act LED indicators to make sure they have valid connections. The Router will attempt 
to establish the WAN connection, if the WAN line is connected and the connection is properly configured this should light up after several seconds.  Reset To reset the system settings to factory defaults, please follow these steps: 
1. Leave the device powered on, do not disconnect the power. 
2. Press the reset button and hold (use a paper-clip). See the back panel illustration above to view the location of the reset button.  
3. Keep the button pressed about 10 seconds. 
4. Release the button. 
The DIR-120 will then automatically reboot itself. Upon restarting the Router will load the factory default configuration settings including the default IP address 192.168.0.1 a 
subnet mask 255.255.255.0 and the DHCP server active.  
 
 
 
CAUTION: The Router must be used with the power adapter included with the device.  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
7 
Basic Router Configuration 
The first time you setup the Router it is recommended that you configure the WAN connection using a single computer making sure that both the computer and the Router are 
not connected to the LAN. Once the WAN connection is functioning properly, you may continue to make changes to Router configuration including IP settings and DHCP 
setup. This chapter is concerned mainly with using your computer to configure the WAN connection. Instructions are also provided for basic Wireless LAN configuration. The 
following chapter describes how to set up the advanced features of the Router.  Configuration Summary 
1. Connect to the Router To configure various settings used by the Router for Internet and Wireless LAN access it is first necessary to access the Router’s management 
HTML-based interface. This is done using an ordinary web browser. Your computer must be able to “see” the Router before it can manage it using a browser. If the 
Router is in the same “neighborhood” or subnet as the Router, you should be able to access the management software. Therefore, you must first make sure your 
computer has IP settings that place it in the same subnet as the Router. The easiest way to make sure your computer has the correct IP settings is to configure it to use 
the DHCP server in the Router. The DHCP server will automatically enable your computer to use a browser to manage the Router. Appendix B, Configuring IP 
Settings on Your Computer, describes how to change the IP configuration for a computer running a Windows operating system to be a DHCP client. If you are running 
another operating system, make sure your computer is configured as a DHCP client so it can automatically obtain IP settings from the Router. Some operating systems 
will automatically select the best IP settings. Consult the user manual for the operating system (OS) if you are unsure. 
2. Configure the Internet (WAN) Connection Most users will be able to complete this process using the Setup Wizard. The Setup Wizard can be launched once you 
have successfully connected with the Router’s management software.  There are different methods used to establish the WAN connection to the ISP’s network and 
ultimately to the Internet. Your service provider should provide all the information needed to configure the WAN connection for Internet access. 
 
Configuring IP Settings on Your Computer In order to configure your system to receive IP settings from the Router it must first have the TCP/IP protocol installed. If you have an Ethernet port on your computer, it 
probably already has TCP/IP protocol installed. See Appendix B for instruction on how to configure Windows computers to be DHCP clients.   
For computers running non-Windows operating systems, follow the instructions for your OS that configure the system to receive an IP address from the Router, that is, 
configure the system to be a DHCP client.  
For computers using manually configured IP settings, make sure the IP address is on the same subnet as the Router. The computer should use an IP address in the range 
192.168.0.2 to 192.168.0.254 with a subnet mask of 255.255.255.0. 
 
   
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
8 
Accessing the Configuration Manager Now that your computer’s IP settings allow it to communicate with the Router, you can access the configuration software.  
To use the web-based management software, launch a suitable web browser and direct it to the IP address of the Router. 
Type in http:// followed by the default IP address, 192.168.0.1 in the address bar of the browser. The URL in the address 
bar should read: http://192.168.0.1. Once entered, the user will be prompted to enter the username and password to access 
the Configuration Manager, as show below. A new window will appear and you will be prompted for a user name and 
password to access the web-based manager.  
 
 NOTE: The wrong proxy server settings on your browser can prevent connection to the web manager. 
If you are having trouble connecting to the web interface of the Router, configure the proxy settings to 
bypass the proxy server or disable use of proxy servers and try to connect again. 
 
To check proxy setting for Windows Internet Explorer: 
1. In Windows, click on the Start button, go to Settings and choose Control Panel. 
2. In the Control Panel window, double-click on the Internet Options icon. (Alternatively you can access this Internet Options menu using the Tools pull-down menu in 
Internet Explorer.) 
3. Click the Connections tab and click on the LAN Settings button. 
4. Verify that the “Use proxy server” option is NOT checked. If it is checked, click in the checked box to deselect the option and click OK. 
 
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
9 
Login Use the default user name “admin” and no password for first time setup. You should change the web-based manager access user name and password once you have verified that 
a connection can be established. The user name and password allows any PC within the same subnet as the Router to access the web-based manger. 
 
Login menu  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
10 
Web Manager The Web Manager used for configuration uses directories to organize the various menus used to configure and monitor the Router. The first page that appears after logging in 
presents the Internet menu in the Setup menu directory. 
 
Internet Connection menu 
Most users will be able to configure their Internet connection using the Setup Wizard. Click the Setup Wizard button on the first menu that appears after logging in to access 
the Setup Wizard. For printer setup, click the Printer Setup link and use the Printer Setup Wizard to configure the Router’s USB printer connection. See Printer Setup for 
details. 
Click to access menu directories: 
Setup, Advanced, Tools and Support. 
Select language used 
for web interface 
Click to launch Setup Wizard for Internet connection.  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
11 
Configure Internet Connection with the Setup Wizard To use the Setup Wizard, open the Setup menu directory (the first page you see after logging in), and click the SetupWizard button to go to the Wizard menu. 
 
 
Wizard menu 
Click the Launch Internet Connection Setup Wizard button to begin configuration on the Internet connection. 
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
12 
Setup Wizard – Welcome  The initial dialog box summarizes the setup process. Click the Next button to proceed. You may stop using the Setup Wizard at any time by clicking the Cancel button. If you 
exit the wizard you will return to the Internet Connection menu page without saving any of the settings changed during the process. 
 
 
Setup Wizard welcome menu 
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
13 
Setup Wizard – Step 1 Type a new Password used for system administration in the space provided and the same password again in the Confirm Password space. This will be the new system 
password used to login. Remember that this password is case sensitive so it must be typed exactly as you are typing it here when you want to access the web manager. The user 
cannot change the system User Name used for login, admin. Click the Next button to proceed, click the Prev button to see the previous wizard menu. 
 
 
 
 
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
14 
Setup Wizard – Step 2 Choose the time zone you are in from the pull-down menu and click Next. This sets the system time used for the Router. If you wish to return to the previous menu during the 
setup process, click the Prev button.