D-Link Router DIR-120 User Manual

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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Dynamic IP (DHCP) Internet Connection A Dynamic IP Address connection configures the Router to 
automatically obtain its global IP address from a DHCP server on the 
ISP’s network. The service provider assigns a global IP address from a 
pool of addresses available to the service provider. Typically the IP 
address assigned has a long lease time, so it will likely be the same 
address each time the Router requests an IP address. 
After configuration of Internet and local network IP settings is complete, 
click the Save Settings button to save the configuration changes made 
and reboot the Router. 
Dynamic IP Internet Connection configuration menu 
Host Name 
Enter the Host Name provided if necessary (optional). 
MAC Address / 
Clone MAC Address 
 This field will instruct the user to enter the Media Access Control (MAC) address of the Ethernet Card of your computer, if 
instructed to do so by your ISP. To quickly accomplish this, click the Clone MAC Address button, which will automatically 
copy the MAC address of your Ethernet card and enter it into the space provided, which will replace the MAC address of 
the router. MTU 
The Maximum Transmission Unit size may be changed if you want to optimize efficiency for uploading data through the WAN 
interface. The default setting (1492 bytes) should be suitable for most users. Some user may want to adjust the setting to 
optimize performance for wireless traffic or when low latency is desired (such as with Internet gaming). It is highly recommended 
that the user research how adjusting the MTU may affect network traffic throughput.  
Primary DNS Address This entry is for the IP address of your primary domain name server, which should also be provided to you by your ISP. 
The router will first try the Primary DNS Address to resolve a website’s URL IP address. If this IP address fails, the router 
will then try the Secondary DNS Address. Secondary DNS Address The IP address of the secondary domain name server will be used to resolve a website’s URL IP address if the Primary 
DNS Address fails. The information in this field should also be provided by your ISP. 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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Static IP Internet Connection Your ISP should provide IP settings information needed for your public IP 
address and other settings using the Static IP connection type. 
After configuration of Internet and local network IP settings is complete, click 
the Save Settings button to save the configuration changes made and reboot the 
Router. 
Static IP Internet Connection configuration menu 
IP Address 
Type in the public or global IP address provided by your ISP. 
Subnet Mask 
Type the Subnet Mask used for the public network interface.  
ISP Gateway Address 
Type the IP address of the gateway router (normally) owned by your ISP. 
MAC Address /            
Clone MAC Address 
 
MAC Address - If you clone the MAC address of your computer to the Router, the MAC address will appear here. This will be 
the MAC address presented to the ISP’s server when the connection is initiated.  
Clone MAC Address - The default MAC address is set to the WAN’s physical interface MAC address on the Broadband 
Router. You can use the “Clone MAC Address” button to copy the MAC address your computer’s Ethernet Card to the Router. 
Primary DNS Address/ 
Secondary DNS Address 
Type in the IP address of the primary DNS and secondary  server. 
 
   
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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PPPoE PPP or Point-to-Point protocol is a standard method of 
establishing a network connection/session between 
networked devices. Different forms of PPP include PPPoA 
and PPPoE (discussed below) involve an authentication 
process that requires a username and password to gain 
access to the network. PPPoE (PPP over Ethernet), as 
described in RFC 2516, is a method of using PPP through 
the Ethernet network. 
To configure the connection for PPPoE, perform the steps 
listed below. Some of the settings do not need to be changed 
the first time the device is set up, but can be changed later if 
you choose. The information that is to be provided in this 
window must be given to you by your ISP and must be 
carefully configured. Any small discrepancy will send the 
wrong message to your ISP’s server and inhibit your 
connection.  
There are two ways to configure the PPoE connection on the 
router, one is for a Dynamic PPPoE configuration, which 
means the router will implement some settings automatically 
through DHCP, such as the router’s IP address and the 
default gateway. The other is through a Static PPPoE 
connection, in which the user must configure the IP address 
and the DNS addresses automatically. 
After configuration of Internet and local network IP settings 
is complete, click the Save Settings button to save the 
configuration changes made and reboot the Router. 
 
PPPoE Internet Connection configuration menu 
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
28 
The table below describes the PPPoE Internet Connection menu settings.  
User Name The user name supplied to you by your ISP. 
Password The password supplied to you by your ISP. Retype Password Retype the password entered in the Password feld. Service Name Enter the service name supplied to you by your ISP, if required. IP Address Enter the IP address given to you by your ISP. This field is only to be completed if the Static PPPoE button is 
selected. MAC Address This field requires the user to enter the Media Access Control (MAC) address of the Ethernet Card of your 
computer, if instructed to do so by your ISP. To quickly accomplish this, click the Clone MAC Address button, 
which will automatically copy the MAC address of your Ethernet card and enter it into the space provided, which 
will replace the MAC address of the router. Primary DNS Address This entry is for the IP address of your primary domain name server, which should also be provided to you by your 
ISP. The router will first try the Primary DNS Address to resolve a website’s URL IP address. If this IP address 
fails, the router will then try the Secondary DNS Address. This field is only to be completed if the Static PPPoE 
button is selected. Secondary DNS Address The IP address of the secondary domain name server will be used to resolve a website’s URL IP address if the 
Primary DNS Address fails. The information in this field should also be provided by your ISP and is only to be 
completed if the Static PPPoE button is selected. Maximum Idle Time A value of 0 means that the PPP connection will remain connected. If your network account is billed according to 
the amount of time the Router is actually connected to the Internet, enter an appropriate Idle Time value (in 
seconds). This will disconnect the Router after the WAN connection has been idle for the amount of time specified. 
The default value = 5. MTU This field refers to the Maximum Transfer Unit, which is the maximum size of a packet, in bytes, that will be 
accepted by the router. The default setting is 1500 bytes. This field should not be altered unless instructed by your 
ISP. Connect Mode Select This function, with Connect-on-demand selected, will allow the router to connect any workstation on your LAN to 
the Internet upon request. If this function is set at Always-on, no request from the workstation will be needed to 
connect to the Internet. If Manual is selected, it will be necessary for the workstation on the LAN to manually 
connect to the Internet through this router. 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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PPTP If your ISP is using PPTP to provide your Internet connection, the ISP 
will give you the necessary information to configure the Router. 
There are two ways to enable the router to become a PPTP client, one is 
through assigning the router an IP address dynamically, which means that 
the DHCP protocol will be implemented by the Router to automatically 
configure the IP settings. The user may input the IP settings manually by 
choosing the Static IP option above the configuring area.  
After configuration of Internet and local network IP settings is complete, 
click the Save Settings button to save the configuration changes made 
and reboot the Router. 
 
PPTP Internet Connection configuration menu  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
30 
To configure the router to be a PPTP client, complete the following fields and click the Save Settings button. 
IP Address 
Type the IP address supplied by your ISP.  
Subnet Mask 
Type the Subnet mask supplied by your ISP. Gateway  The gateway IP address is used provide access to resources outside your IP Subnet or ISP’s network. Type the 
gateway IP address given to you by your ISP.  DNS This entry is for the IP address of your primary domain name server, which should also be provided to you by your 
ISP. Server IP/Name Enter the Server IP address for this protocol into this field. This is the IP address of the server computer that will be 
used, along with your computer, to create the Virtual Private Network. This field must be completed for both the 
Dynamic IP and Static IP options PPTP Account Enter the PPTP account name, provided to you by your ISP, here.  PPTP Password Enter your password for this PPTP account here, as stated to you by your ISP. PPTP Confirm Password Retype the password entered in the PPTP Password field. Maximum Idle Time A value of 0 in this field means that the PPTP connection will remain connected. If your network account is billed 
according to the amount of time the Router is actually connected to the Internet, enter an appropriate Idle Time value 
(in seconds). This will disconnect the Router after the WAN connection has been idle for the amount of time specified. 
The default value = 5. MTU This field refers to the Maximum Transfer Unit, which is the maximum size of a packet, in bytes, that will be accepted 
by the router. The default setting is 1500 bytes. This field should not be altered unless instructed by your ISP. Connect Mode Select This function, with Connect-on-demand selected, will allow the router to connect any workstation on your LAN to the 
Internet upon request. If this function is set at Always-on, no request from the workstation will be needed to connect 
to the Internet. If Manual is selected, it will be necessary for the workstation on the LAN to manually connect to the 
Internet through this router. 
 
 
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
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L2TP If your ISP is using L2TP to provide your Internet connection, the ISP 
will give you the necessary information to configure the Router. 
There are two ways to enable the router to become a L2TP client, one 
is through assigning the router an IP address dynamically, which 
means that the DHCP protocol will be implemented by the Router to 
automatically configure the IP settings. The user may input the IP 
settings manually by choosing the Static IP option above the 
configuring area.  
After configuration of Internet and local network IP settings is 
complete, click the Save Settings button to save the configuration 
changes made and reboot the Router. 
 
L2TP Internet Connection configuration menu  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
32 
To configure the router to be a L2TP client, complete the following fields and click the Save Settings button. 
IP Address 
Type the IP address supplied by your ISP.  
Subnet Mask 
Type the Subnet mask supplied by your ISP. Gateway  The gateway IP address is used provide access to resources outside your IP Subnet or ISP’s network. Type the 
gateway IP address given to you by your ISP.  DNS This entry is for the IP address of your primary domain name server, which should also be provided to you by your 
ISP. Server IP/Name Enter the Server IP address for this protocol into this field. This is the IP address of the server computer that will be 
used, along with your computer, to create the Virtual Private Network. This field must be completed for both the 
Dynamic IP and Static IP options L2TP Account Enter the L2TP account name, provided to you by your ISP, here.  L2TP Password Enter your password for this L2TP account here, as stated to you by your ISP. L2TP Confirm Password Retype the password entered in the L2TP Password field. Maximum Idle Time A value of 0 in this field means that the L2TP connection will remain connected. If your network account is billed 
according to the amount of time the Router is actually connected to the Internet, enter an appropriate Idle Time value 
(in seconds). This will disconnect the Router after the WAN connection has been idle for the amount of time specified. 
The default value = 5. MTU This field refers to the Maximum Transfer Unit, which is the maximum size of a packet, in bytes, that will be accepted 
by the router. The default setting is 1500 bytes. This field should not be altered unless instructed by your ISP. Connect Mode Select This function, with Connect-on-demand selected, will allow the router to connect any workstation on your LAN to the 
Internet upon request. If this function is set at Always-on, no request from the workstation will be needed to connect 
to the Internet. If Manual is selected, it will be necessary for the workstation on the LAN to manually connect to the 
Internet through this router. 
 
 
 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
33 
L2TP If your ISP is using L2TP to provide your Internet connection, the 
ISP will give you the necessary information to configure the Router. 
There are two ways to enable the router to become a L2TP client, 
one is through assigning the router an IP address dynamically, 
which means that the DHCP protocol will be implemented by the 
Router to automatically configure the IP settings. The user may 
input the IP settings manually by choosing the Static IP option 
above the configuring area. 
After configuration of Internet and local network IP settings is 
complete, click the Save Settings button to save the configuration 
changes made and reboot the Router. 
 
BigPond Internet Connection configuration menu 
User Name The user name supplied to you by your ISP. 
Password The password supplied to you by your ISP. Confirm Password Retype the password entered in the Password feld. Auth Server Toggle the Authentication Server between sm-server and dce-server. Login Server IP/Name Enter the IP address given to you by your ISP. This field is optional. MAC Address This field requires the user to enter the Media Access Control (MAC) address of the Ethernet Card of your computer, 
if instructed to do so by your ISP. To quickly accomplish this, click the Clone MAC Address button, which will 
automatically copy the MAC address of your Ethernet card and enter it into the space provided, which will replace the 
MAC address of the router. 
 
  
						

							DIR-120 Ethernet Broadband Router 
 D-Link DIR-120 User Manual                                                      
34 
Network (LAN IP) Settings 
 
Network Setting menu 
Use this window to configure Router Settings and DHCP Server Settings. 
When you are finished, click the Save Settings button at the top of the 
window.   
Use the Network Settings menu to configure the LAN IP settings, DHCP 
server status and DHCP static IP addresses for the LAN. Any active DHCP 
clients are listed here.  
After configuration of Internet and local network IP settings is complete, 
click the Save Settings button to save the configuration changes made and 
reboot the Router. Router Settings This section is used to configure the internal network settings of the Router. 
This IP address is private to your internal network and cannot be seen on the 
Internet. The default Router IP Address is 192.168.0.1 and the Default 
Subnet Mask is 255.255.255.0. The Local Domain Name is for the local 
Domain set on your network, if you have given it a name previously. This 
field is for your personal use and unnecessary for proper configuration of this 
window.  
In addition, the Router can be configured to relay DNS from your ISP or 
another available service to workstations on your LAN. When Enable DNS 
Relay is checked, the Router will accept DNS requests from hosts on the 
LAN and forward them to the ISP (or alternative) DNS servers. 
Alternatively, you may also disable the DNS relay and configure hosts on 
your LAN to use DNS servers directly. Most users who are using the Router 
for DHCP service on the LAN and are using DNS servers on the ISP’s 
network, will leave DNS relay enabled.