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Wireless Cable Modem Gateway CGD24G User Manual
Customizing Your Network
5-9
v1.1, May 2009
To delete an IP address from the DHCP Client Lease Info table:
1.
In the DHCP Client Lease Info table, click the radio button for the MAC and IP address that
you want to remove.
2.
Click
Delete
to remove the information for the selected MAC and IP address from the DHCP
Client Lease Info table.
To remove all information from the DHCP Client Lease Info table, click
Clear DHCP Leases
.
Enabling Remote Management
With Remote Management, you can allow a user or users on the Internet to configure, upgrade,
and check the status of the gateway.
To configure the gateway for remote management:
1.
In the main menu, under Advanced, select Remote Management. The Remote Management
screen displays.
2.
Select the
Allow Remote Management
check box.
Figure 5-6
Page 72 / 90
Wireless Cable Modem Gateway CGD24G User Manual
5-10
Customizing Your Network
v1.1, May 2009
3.
Enter the following information:
•
Remote Password
. Enter the user name that will be used from the remote PC to manage
the gateway. This password is different from the password that you use to log into the
gateway from your LAN.
•
Port Number
. Specify the port number that will be used for accessing the management
interface. The default port number is 80.
4.
Click
Apply
to save your changes.
Reverting to Factory Default Setting
If you would like to erase settings but continue to allow access from the WAN after the settings
have been erased, select the
Allow Remote Management after Factory Default Reset
check box
under “Revert to factory default settings” in the Remote Management screen. Then, click
Erase
.
Note:
Be sure to change the gateway’s remote management password to a very
secure password before enabling remote management. The ideal password
should contain no dictionary words from any language, and should be a
mixture of letters (both upper and lower case), numbers, and symbols.
Your password can be up to 16 characters.
Note:
Web browser access normally uses the standard HTTP service port 80. For
greater security, you can change the remote management Web interface to
a custom port by entering that number in the box provided. Choose a
number between 1024 and 65535, but do not use the number of any
common service port. The default is 8080, which is a common alternate for
HTTP.
Note:
Do not attempt to go online, turn off the gateway, shut down the computer,
or do anything else to the gateway until the gateway finishes restarting.
When the test light turns off, wait a few more seconds before you do
anything with the gateway.
After you have erased the gateway’s current settings, the gateway’s
password will be password, the LAN IP address will be 192.168.0.1, the
gateway will function as a DHCP server on the LAN, and the gateway will
function as a DHCP client to the Internet.
Page 73 / 90
Wireless Cable Modem Gateway CGD24G User Manual
Customizing Your Network
5-11
v1.1, May 2009
Managing the URL to Connect to The Gateway
To manage the gateway via the Internet, you need its public IP address, as seen from the Internet.
This public IP address is allocated by your ISP, and is shown under “IP Address to connect this
device” in the Remote Management screen. Note that if your ISP account uses a dynamic IP
address instead of a fixed IP address, the address can change each time you connect to your ISP.
There are two solutions for this issue:
•
Be sure that your ISP allocates a fixed IP address for the gateway.
•
Use the Dynamic DNS feature so you can connect using a domain name, rather than an IP
address. See
“Configuring Dynamic DNS” on page 5-1
.
Configuring Universal Plug and Play (UPnP)
Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers, access
the network and connect to other devices as needed. UPnP devices can automatically discover the
services from other registered UPnP devices on the network.
To configure UPnP:
1.
In the main menu, under Advanced, select UPnP. The UPnP screen displays.
2.
Select the
Turn UPnP On
check box. The default setting is disabled, which prevents the
gateway from allowing any device to automatically control of its the resources, such as port
forwarding.
Figure 5-7
Page 74 / 90
Wireless Cable Modem Gateway CGD24G User Manual
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Customizing Your Network
v1.1, May 2009
3.
Enter the following information:
•
Advertisement Period
. Enter how often the gateway broadcasts its UPnP information.
The default is 30 minutes.Shorter durations will ensure that control points have current
device status at the expense of additional network traffic. Longer durations may
compromise the freshness of the device status but can significantly reduce network traffic.
•
Advertisement Time to Live
. Enter the time to live for the advertisement, which is
measured in hops (steps) for each UPnP packet that is sent. A hop is the number of steps
that are allowed to propagate for each UPnP advertisement before it disappears. The
number of hops can range from 1 to 255. The default value for the advertisement time to
live is 4 hops, which should be fine for most home networks. If you notice that some
devices are not being updated or reached correctly, you might need to increase this value
slightly.
The UPnP Portmap Table displays the IP address of each UPnP device that is currently
accessing the router and which internal and external ports of the gateway were opened by that
device. The UPnP Portmap Table also displays the protocol for the port that was opened and if
that port is still active for each IP address.
4.
Perform one of the following actions:
•
Click
Apply
to save your settings.
•
Click
Cancel
to disregard any unsaved changes.
•
Click
Refresh
to update the UPnP Portmap Table and to show the active ports that are
currently opened by UPnP devices.
Page 75 / 90
6-1
v1.1, May 2009
Chapter 6
Troubleshooting
This chapter gives information about troubleshooting your CGD24G Wireless Cable Modem
Gateway. For the common problems listed, go to the section indicated.
•
Have I connected the gateway correctly?
Go to
“Basic Functions” on page 6-1
.
•
I cannot access the gateway configuration with my browser.
Go to
“Connecting to the Gateway’s Main Menu” on page 6-3
.
•
I have configured the gateway but I cannot access the Internet.
Go to
“Troubleshooting the ISP Connection” on page 6-4
.
•
I cannot remember the gateway’s configuration password or I want to clear the configuration
and start over again.
Go to
“Backing Up and Restoring Your Settings” on page 4-5
.
Basic Functions
After you have turned on power to the gateway, you should do the following:
1.
When power is first applied, verify that the Power LED is on.
2.
Verify that the numbered Ethernet LEDs come on momentarily.
3.
After a few seconds, verify that the Local port Link LEDs are lit for any local ports that are
connected.
If any of these conditions does not occur, refer to the appropriate following section.
Tip:
NETGEAR provides helpful articles, documentation, and the latest software
updates at
.

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