Cisco Router DPC3925 User Manual

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 How Do I Configure My DOCSIS Residential Gateway? 
 
 
 
4 On the Administration Management page, create a User Name and Password 
and then click Save Settings. Once you save the settings for your User Name and 
Password on the Administration Management page, the Setup Quick Setup page 
opens. 
Important: You have the option to leave the password field blank (factory 
default). However, if you do not change your User Name and Password, you 
will be directed to the Administrative Management page each time you access 
the gateway. This serves as a reminder to set up your personalized password. 
Once you have personalized your Password, subsequent logins will take you 
directly to the Setup Quick Setup page. 
5 After you make your selections, click Save Settings to apply your changes or 
Cancel Changes to cancel.  
Setup > Quick Setup 
The Setup Quick Setup page is the first page to open after you have logged on to 
your gateway. You can use the settings on this page to change your password and to 
configure the WLAN. 
Important: The settings on this page are unique to your device. If you choose, you 
do not need to make any changes to the settings on this page. These default settings 
are all that you need to operate a secure wireless network.  
						

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Configuring Quick Settings 
Use the descriptions and instructions in the following table to configure the network 
settings for the device. After you make your selections, click Save Settings to apply 
your changes or click Cancel Changes to cancel. 
Section Field Description 
Change Password User Name  
Displays the user name for the operator currently logged in 
Change Password to  
Allows you to change your password 
Re-Enter New Password  
Allows you to re-enter the new password. You must enter the same 
password as the one entered in the field Change Password to  
						

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Section Field Description 
WLAN Wireless Network  
Allows you to enable or disable the wireless network. Select the 
desired option: 
 Enable 
 Disable  
Wireless Network Name (SSID)  
Allows you to enter a name for your wireless network or to use the 
default value. The value you enter he will be viewable on PCs and 
other wireless client devices such as the wireless network name. 
Note: The factory default Service Set Identifier (SSID) is normally 
equal to the last 6 characters of the CM MAC Address. The CM MAC 
Address can be found on the rating label attached to your wireless 
gateway. 
Wireless Security Mode  
Allows you to select a wireless security mode to help protect your 
network. If you select Disable then your wireless network is not 
secure and any wireless device within range may connect to it. See 
Wireless Security (on page 42) for detailed descriptions of wireless 
security modes. 
Note: The factory default Wireless Security Mode is WPA or  
WPA2-Personal. 
Encryption  
Allows you to select a level of encryption based on the wireless 
security mode you choose. See Wireless Security (on page 42) for 
detailed descriptions of encryption. 
Pre-Shared Key  
The pre-shared key for the device. The key can be from 8 to 63 
characters. The factory default Pre-Shared Key is equal to the 9-digit 
serial number of your gateway. The serial number can be found on 
the rating label attached to your wireless gateway. 
Note: Your service provider may provide you with a wireless 
configuration card that contains SSID and wireless security 
configuration information for your home network that may differ 
from what is described above.   
						

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Setup > Lan Setup 
The Setup Lan Setup page allows you to configure the settings for the Local Area 
Network (LAN) in your home. These settings include the range of IP addresses that 
define the LAN itself as well as how the addresses are assigned (automatically by 
DHCP or manually) as new devices are added to the network. 
Important: Unless you are knowledgeable about administering IP addresses, we 
recommend that you do not change these settings. If you change these values 
incorrectly, you can lose Internet access. 
Select the Lan Setup tab to open the Setup Lan Setup page. 
 
Configuring Your Network Settings 
Use the descriptions and instructions in the following table to configure the network 
settings for your residential gateway. After you make your selections, click Save 
Settings to apply your changes or click Cancel Changes to cancel. 
Section Field Description 
Network Setup 
(LAN) 
Gateway IP 
Local IP Address  
The base IP address of the private home LAN. The factory default 
LAN IP Address is 192.168.0.1. 
Subnet Mask  
The subnet mask for your LAN  
						

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Section Field Description 
Network Address 
Server Settings 
(DHCP) 
DHCP Server 
Allows you to enable or disable the DHCP server in the 
residential gateway. The DHCP server is used to automatically 
allocate IP addresses to devices as they are attached to your home 
network. 
 Connected Devices Summary page 
Click Connected Devices Summary in the Lan Setup page. The 
Connected Devices Summary page opens. This page is a pop-up 
window that displays the MAC Address and IP Address of the 
devices that are connected to the residential gateway. 
 
 Pre-assigned DHCP IP Addresses page 
Click Pre-assigned DHCP IP Addresses in the Lan Setup page. 
The Pre-assigned DHCP IP Addresses page opens. This page 
allows you to assign a specific IP address to a PC or other device 
when they request an IP address using DHCP. Only addresses 
within the range of the gateways DHCP address pool can be 
reserved with this feature. 
 
Notes:  
– The Add Static IP button adds the Static IP address to the 
list of pre-assigned IP addresses. 
– The Remove Static IP button removes the Static IP 
address from the list of pre-assigned IP addresses 
Starting IP Address 
Displays the starting address used by the built-in DHCP server to 
distribute Private LAN IP addresses. Because the device default 
IP address of the gateway is 192.168.0.1, the starting IP address 
must be 192.168.0.2 or greater, but smaller than 192.168.0.253. The 
default Starting IP Address is 192.168.0.10.  
						

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Section Field Description 
 Maximum Number of DHCP Users  
Enter the maximum number of users to which the DHCP server 
can assign IP addresses for use in the LAN. This number cannot 
be greater than 254 minus the starting IP address described 
above. 
Client Lease Time  
The Client Lease Time is the amount of time an IP address is 
valid. IP address leases are renewed automatically by your PC 
and other devices that use DHCP to obtain IP addresses. If a lease 
is allowed to expire, the IP address will be returned to the pool of 
available IP addresses that can be assigned by the DHCP server 
as new devices are added to your network. The default is 60 
minutes when the gateway is online.  
LAN Static DNS (Domain Name Server) 1-3 
DNS is used by a PC or other client devices to discover the public 
IP address associated with a URL or the name-based address of a 
website. You can manually specify which DNS servers are to be 
used by devices in your network by entered the IP addresses of 
those servers in  these fields. Otherwise, the gateway will forward 
the DNCS server information from your service provider 
automatically. The default is to leave these fields blank.  
Time Settings Time Zone 
Select the time zone for your location. If your location follows 
daylight saving time, select Automatically adjust clock for 
daylight saving time.  
Setup > DDNS 
Dynamic Domain Name Service (DDNS) provides the residential gateway (that may 
have a changing IP address) with a host name or URL resolvable by network 
applications through standard DNS queries. DDNS is useful when you are hosting 
your own website, FTP server, or other server behind the device. Before using this 
feature, you need to sign up for DDNS service. 
Select the DDNS tab to open the Setup DDNS page.  
						

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Section Field Description 
DDNS 
Service 
Disabling DDNS (Factory Default Settings) 
To disable DDNS, select Disabled from the drop-down list and click Save 
Settings. 
 
Enabling DDNS 
Note: In order to use the DDNS feature, you must first set up an account and 
establish a URL with www.DynDNS.org. The DDNS feature will not work 
without a valid account. 
To set up a DDNS account, open your browser and enter www.DynDNS.org 
in the address bar. Follow the instructions on the website to set up an account. 
To enable DDNS, follow these steps. 
1 On the DDNS page, select www.DynDNS.org as your DDNS server. 
 
2 Configure the following fields: 
 User Name 
 Password 
 Host Name 
3 Click Save Settings. The device will now advise the DDNS service of your 
current WAN (Internet) IP address whenever this address changes. 
Important: The Status area of the window will display the status of the 
DDNS service connection. 
  
						

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Configure Wireless Settings 
 
Configure Wireless Settings 
This section describes the options available from the Wireless pages that you can use 
to configure the parameters of the WAP to meet your specific requirements and 
needs.  
Wireless > Basic Settings 
Setting up your residential gateway for wireless communication provides you with 
the freedom to connect to the Internet from any location within range of the WAP 
without having to use wired connections. Select the Basic Settings tab to open the 
Wireless Basic Settings page.  
The Wireless Basic Settings page allows you to choose your wireless network mode 
and other basic features. 
 Wireless Network: Enable or Disable 
 Wireless Configuration: Manual or Wi-Fi Protected Setup (WPS) 
 Network Mode 
 Radio Band 
 Channel Width 
 Standard Channel  
 Wireless Network Name (SSID) 
Wi-Fi Protected Setup (WPS) 
When you select Wi-Fi Protected Setup (WPS) as your wireless configuration, many 
settings will be pre-configured. WPS allows simplified setup that allows you to 
easily attach new WPA-enabled devices to your network. 
Important: When using WPS mode, WEP is not supported. If you must use WEP 
encryption, WPS must be disabled by setting the Wireless Configuration to Manual. 
Note: WPS is the default setting.  
						

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Wireless Configuration Wi-Fi Protected Setup Example 
 
Wireless Configuration Wi-Fi Protected Setup Page Description 
Use the descriptions and instructions in the following table to configure the basic 
settings for Wi-Fi Protected Setup for the residential gateway. After you make your 
selections, click Save Settings to apply your changes or Cancel Changes to cancel. 
Section Field Description   
Basic Settings Enable or Disable the wireless network 
Wi-Fi Protected Setup Configuration 
The Wi-Fi Protected Setup feature automatically configures an 
encryption-secured, wireless network. To use Wi-Fi Protected Setup, you 
must have at least one other device that supports Wi-Fi Protected Setup 
in your network. After you have configured your Wi-Fi Protected Setup 
devices, you can manually configure other devices. 
WPS Push Button Setup (Option 1)  
Press the Wi-Fi Protected Setup button on the Basic Wireless Settings 
page or the button on the back panel of the gateway to register a wireless 
client with the gateway. Press the Wi-Fi Protected Setup software button 
on the client side at the same time as the Wi-Fi Protected Setup button is 
pushed on the gateway. The connection will be automatically set up.   
						

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Section Field Description   
WPS Setup Using Your Wi-Fi Adapter PIN (Option 2)  
This is the most secure option to register a wireless client with the 
gateway. You need the Wi-Fi Protected Setup PIN number, which is 
found in the client Wi-Fi Protected Setup utility. After entering the clients 
Wi-Fi Protected Setup PIN number, you can then connect to the gateway.  
WPS Setup Using the Gateway PIN (Option 3)  
Note the gateways Wi-Fi Protected Setup PIN number that is displayed 
on the Wi-Fi Protected Setup page. Click the Register button in Option 3, 
then using any Wi-Fi Protected Setup client utility or Microsoft Vista, 
enter the gateways Wi-Fi Protected Setup PIN number into the client 
device to complete registration.  
Wireless Configuration Manual Page Example 
 
Wireless Basic Settings Page Description 
Use the descriptions and instructions in the following table to manually configure 
the basic settings for wireless communication for the residential gateway. After you 
make your selections, click Save Settings to apply your changes or Cancel Changes 
to cancel.