D-Link Router DIR-120 User Manual

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
45 
 Website Filter The Website Filter feature filters URLs. A URL is a specially formatted text string that uniquely defines an Internet website. This window will allow users to block computers 
on the LAN from accessing certain URLs. This may be accomplished by simply entering the URL to be blocked in the Website URL Address field. The three options 
available for configuring Website Filtering from the drop-down menu on the window below are: Turn Website Filtering OFF, Turn Website Filtering ON and ALLOW 
computers access to ONLY these sites, and Turn Website Filtering ON and DENY computers access to ONLY these sites. When you are finished, click the Save Settings button 
at the top of the window.  
To access this window, click the Advanced tab along the top of the configuration window, then the Website Filter tab to the left hand side. 
 
Website Filtering Rules menu  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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Firewall Settings menu 
Firewall Rules To configure rules for the firewall, modify the following fields and click the Save Settings button at the top of the window to set the rule in the Routers memory. Newly 
configured firewall rules will be displayed in the Firewall Rules List at the bottom of the window.   Firewall Settings The DIR-120 Broadband Router comes equipped with a firewall. This configuration window allows the 
Router to enforce specific predefined policies intended to protect against certain common types of 
attacks. To configure the Router’s firewall, click the Advanced tab at the top of the window and then 
the Firewall Settings tab to the left. 
Stateful Packet Inspection (SPI) is a type of firewall that protects your network against hacker attacks 
by analyzing packets to ensure that only authorized packets will be allowed to enter your network. To 
enable this function, tick the Enable SPI checkbox. 
A DoS denial-of-service attack is characterized by an explicit attempt by attackers to prevent 
legitimate users of a service from using that service. Examples include: attempts to flood a network, 
thereby preventing legitimate network traffic, attempts to disrupt connections between two machines, 
thereby preventing access to a service, attempts to prevent a particular individual from accessing a 
service, or, attempts to disrupt service to a specific system or person. To enable this function, tick the 
Enable DoS Prevention checkbox. DMZ Host Firewalls may conflict with certain interactive applications such as video conferencing or playing 
Internet video games. For these applications, a firewall bypass can be set up using a DMZ IP address. 
The DMZ IP address is a “visible” address and does not benefit from the full protection of the firewall 
function. Therefore it is advisable that other security precautions be enabled to protect the other 
computers and devices on the LAN. It may be wise to use isolate the device with the DMZ IP address 
from the rest of the LAN.  
For example, if you want to use video conferencing and still use a firewall, you can use the DMZ IP 
address function. In this case, you must have a PC or server through which video conferencing will 
take place. The IP address of this PC or server will then be the DMZ IP address. You can designate the 
server’s IP address as the DMZ by typing in the IP address in the DMZ IP Address space provided 
and then enabling its status by ticking the Enable DMZ Host checkbox. Click the Save Settings 
button at the top of the window when you are finished.  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
47 
Advanced Network 
 
UPNP 
UPnP supports zero-configuration networking and automatic discovery for many types of 
networked devices. When enabled, it allows other devices that support UPnP to dynamically 
join a network, obtain an IP address, convey its capabilities, and learn about the presence and 
capabilities of other devices. DHCP and DNS service can also be used if available on the 
network. UPnP also allows supported devices to leave a network automatically without adverse 
effects to the device or other devices on the network. 
Diverse networking media including Ethernet, 802.11b/g wireless, Firmware, phone line and 
power line networking can support UPnP. To enable UPnP, tick the Enable UPnP checkbox. WAN Ping This feature allow users to either allow or block a Ping test from outside computers looking to 
check the connectivity of your device. This is usually attempted by hackers trying to access 
your router or computer from a remote device on the WAN side of the connection. Tick the 
Enable WAN Ping Respond checkbox to allow WAN pinging of your device. WAN Port Speed This section allows the user to set the wire speed over which the router will transmit packets. 
The user has three options: 
• 10Mbps – Selecting this option from the drop-down menu will set the wire speed at 10 
megabytes per second. 
• 100Mbps – Selecting this option from the drop-down menu will set the wire speed at 
100 megabytes per second.   
• 10/100 Mbps Auto  – Selecting this option from the drop-down menu will allow the 
wire speed to be automatically set by the Router depending on the wire speed available 
at any given time. Gaming Mode Gaming mode opens TCP/UDP ports used by many common games. To take advantage of this 
feature, tick the Enable Gaming mode checkbox.    Multicast Streams Multicast streams will allow servers from the Internet to broadcast their multicast content to 
other PCs on your LAN. Tick the Enable Multicast Streams checkbox to use this feature. 
Most users will want to enable this. 
Advanced Network menu  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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QOS Engine 
 
QoS (Quality of Service) menu 
 
Upstream Bandwidth Use the QoS WAN Upstream Bandwidth drop-down menu to 
adjust the upstream bandwidth setting. Please contact your ISP 
for more information before changing this setting.  QoS This feature allows you to improve your VoIP voice quality or 
stream by prioritizing it over other network traffic such as FTP 
or Web. To use QoS on the Router, tick the Lag eliminated 
(VoIP, Streaming) checkbox. Uplink bandwidth can be 
configured manually with the Manual Uplink Speed pull-down 
menu; or select the Automatic Uplink Speed option to allow 
the Router to select the best speed. Click the Save Settings 
button at the top of the window when you are finished.   
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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Tools The Tools tab allows you to set up basic maintenance features on the Router. The windows available under this tab include Admin, Time, System, Firmware, Dynamic DNS, 
System Check, Schedules, and Log Settings. 
 
Tools directory – Aministrator Settings menu  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
50 
Admin 
 
Administrator Settings 
menu 
 
This window allows you to configure a new password for the 
Router. There is only one administrator account that can access 
the DIR-120’s web management interface. To change the 
password, enter the password into the New Password field and 
repeat the password in the Confirm Password field. Click Save 
Settings to set your new password. 
This window will also allow the user to enable remote 
management of the device from a remote computer. To 
configure this function, click Enable Remote Management 
under the Remote Management heading and then choose the 
corresponding port number of that computer by using the pull-
down menu. Click Save Settings to set these configurations into 
the memeory of the Router.  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
51 
Time 
 
Time menu 
The system time is the time used by the DIR-120 for scheduling 
services. You can configure, update, and maintain the time on 
the internal system clock.   
To configure system time on the Router, determine the method 
used to maintain time. If you wish to use a network time server, 
click to select the Automatically synchronize with Internet 
server option, and type in the IP address or URL of an NTP 
Server Address.  
Select Time Zone and choose Enable Daylight Saving settings 
where appropriate.  
Alternatively, you can manually configure the system time by 
clicking Synch. your computer’s time settings button. Doing 
this will set the Router’s system time to the same time on the 
computer you are using.    
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
52 
System 
 
System Settings menu 
The current system settings can be saved as a file onto the local 
hard drive by clicking the Save button. The saved file or any 
other saved setting file can be loaded back on the Router. To 
reload a system settings file, click on Browse to browse the 
local hard drive and locate the system file to be used. You may 
also reset the Router back to factory settings by clicking on 
Restore Device. In addition, the user can click Reboot to 
restart the Router.  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
53 
Firmware 
 
 
Firmware Upgrade menu 
 
You can upgrade the firmware of the Router at this page. Make 
sure the firmware you want to use is on the local hard drive of the 
computer. Click on Browse to browse the local hard driver and 
locate the firmware to be used for the update. Please check the D-
Link support site for firmware updates at D-Link Technical 
support website of your country. 
In order to keep pace with changes in standards and technology, 
the DIR-120 allows you to easily update the embedded firmware. 
You may obtain the latest version of the DIR-120 firmware by 
logging onto the D-Link web site at www.dlink.com. If you are 
connected to the Internet, you can access the D-Link web site by 
clicking on Check Now. The Firmware Upgrade window lists 
the version of the firmware the Router is currently using. If you 
would like to update, follow the instructions given on the D-Link 
web site firmware update page to download the new firmware. 
You can then use the DIR-120 Firmware Upgrade Utility 
included with the Router to transfer the new firmware to the 
Router. Once you have downloaded the new firmware to your 
computer, use the Browse button to find where it is located on 
your computer, or if you know the path of the file, enter it into the 
space provided. Click Update Now to begin the download. After 
the new firmware has been successfully downloaded into your 
Router, restart the device to let the changes take effect.  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
54 
Dynamic DNS 
 
Dynamic DNS menu 
The DIR-120 supports DDNS or Dynamic Domain Name 
Service. Dynamic DNS allows a dynamic public IP address to be 
associated with a static host name in any of the many domains, 
allowing access to a specific host from various locations on the 
Internet. With this function enabled, remote access to a host will 
be allowed by clicking a URL hyperlink in the following form: 
hostname.dydns.org Because many ISPs assign public IP 
addresses using DHCP, it can be difficult to locate a specific host 
on the LAN using the standard DNS. For example, if you are 
running a public web server or VPN server on your LAN, DDNS 
ensures that the host can be located from the Internet if the public 
IP address changes. DDNS requires that an account be set up with 
one of the supported DDNS servers.  
D-Link offers a free DDNS service. If you are interested in using 
D-Link’s DDNS service, click the hyperlink to 
www.Dlink.DDNS.com
 to sign up. 
To implement Dynamic DNS, first tick the Enable DDNS 
checkbox in the window above, then choose the Server Address 
from the list in the pull-down menu. Next, enter the Host Name 
of the LAN to be accessed, and the Username and Password for 
the DDNS account. Click the Save Settings button to save 
changes made. Use the DDNS Account Testing button to make 
sure the DDNS service is functioning.