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Page 46 / 59 Scroll up to view Page 41 - 45
Advanced Settings
46
NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway
By default, this check box is cleared. This
prevents the gateway from allowing any
devices to automatically control the
resources, such as port forwarding, of
the gateway.
3.
Complete the Advertisement Period and
Advertisement Time to Live fields.
The UPnP Portmap Table displays the IP
address of each UPnP device that is
accessing the gateway and which
internal and external ports of the gateway
that device opened. 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.
Set Networking Protocols
Network Time Protocol (NTP) is a networking protocol that synchronizes clocks between
computer systems over packet-switched, variable-latency data networks.
To enable NTP:
1.
In the main menu, under Advanced, select
NTP
.
2.
Select the
NTP enable
check box.
3.
Enter the IP server addresses.
a.
Enter the first server IP address in the Server IP Address 1 field.
b.
Enter the second server IP address in the Server IP Address 2 field.
c.
Enter the third server IP address in the
Server IP Address 3 field.
4.
Click
Apply
.
Page 47 / 59
Advanced Settings
47
NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway
Enable Network
Address T
ranslation
Network Address Translation (NAT) provides one-to-many translation of IP addresses between
devices. This means that your network presents only one IP address to the Internet, and outside
users cannot directly address any of your local computers. Enable NAT to allow multiple
computers on your network to access the Internet using a single public IP address. NAT is
enabled by default.
To disable NAT:
1.
In the main menu, under Advanced, select
NAT
.
2.
Deselect the
Turn NAT On
box.
3.
Click
Apply
.
Remove USB Devices
To remove a USB device:
1.
In the main menu, under USB Storage, select
Basic Settings
.
2.
Click
Safely Remove USB Device
.
Page 48 / 59
48
6
6.
T
roubleshooting
This chapter gives information about troubleshooting your NETGEAR DOCSIS 3.0 N450 Wi-Fi
Data Gateway. For the common problems listed, see the section indicated.
•
Have I connected the gateway correctly?
See
Basic Functions
on page
49.
•
I cannot access the gateway configuration with my browser.
See
Connect to the Gateway’s Main Menu
on page
49.
•
I have configured the gateway but I cannot access the Internet.
See
Troubleshoot the ISP Connection
on page
50.
•
My gateway is not responding.
•
See
Troubleshoot a TCP/IP Network Using a Ping Utility
on page
50
If you cannot remember the gateway’s configuration password or you want to clear the
configuration and start over again, see
Factory Default Settings
on page
54.
Tip:
NETGEAR provides helpful articles, documentation, and the latest
software updates at
Page 49 / 59
Troubleshooting
49
NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway
Basic Functions
After you have turned on power to the gateway, do the following:
1.
Check to see that the Power LED is lit.
2.
Check that the numbered Ethernet LEDs light momentarily.
3.
After a few seconds, check that the LEDs are lit for any local ports that are connected.
The following table provides help when you are using the LEDs for troubleshooting.
Table 1.
LED behavior
Connect to the Gateway’
s Main Menu
If you are unable to access the gateway’s main menu from a computer on your local network,
check the following:
•
Check the Ethernet connection between the computer and the gateway as described in
the previous section.
LED Behavior
Action
All LEDs are off when the gateway
is plugged in.
•
Make sure that the power cord is properly connected to your
gateway and that the power supply adapter is properly connected
to a functioning power outlet.
•
Check that you are using the 12V-DC power adapter supplied by
NETGEAR for this product.
If the error persists, you have a hardware problem and should contact
technical support.
All LEDs stay on.
Clear the gateway’s configuration to factory defaults. This sets the
gateway’s IP address to 192.168.0.1. See
Factory Default Settings
on
page
54.
If the error persists, you might have a hardware problem and should
contact technical support.
LAN LED is off for a port with an
Ethernet connection.
•
Make sure that the Ethernet cable connections are secure at the
gateway and at the hub or computer.
•
Make sure that power is turned on to the connected hub or
computer.
•
Be sure that you are using the correct cable.
Internet LED is off and the
gateway is connected to the cable
television cable.
•
Make sure that the coaxial cable connections are secure at the
gateway and at the wall jack.
•
Make sure that your cable service provider provisioned your cable
Internet service. Your provider should verify that the signal quality
is good enough for cable modem service.
•
Remove any excessive splitters you might have on your cable line.
It might be necessary to run a “home run” back to the point where
the cable enters your home.
Page 50 / 59
Troubleshooting
50
NETGEAR DOCSIS 3.0 N450 Wi-Fi Data Gateway
•
Make sure that your computer’s IP address is on the same subnet as the gateway. If you
are using the recommended addressing scheme, your computer’s address should be in
the range of 192.168.0.10 to 192.168.0.254.
Note:
If your computer’s IP address is shown as 169.254.x.x:
Recent versions of Windows and Mac OS generate and assign an IP
address if the computer cannot reach a DHCP server. These
autogenerated addresses are in the range of 169.254.x.x. If your IP
address is in this range, check the connection from the computer to
the gateway and reboot your computer.
•
If your gateway’s IP address has been changed and you do not know the current IP
address, clear the gateway’s configuration to factory defaults. This sets the gateway’s IP
address to 192.168.0.1. For more information, see
Factory Default Settings
on page
54
.
•
Make sure that your browser has Java, JavaScript, or ActiveX enabled. If you are using
Internet Explorer, click
Refresh
to make sure that the Java applet is loaded.
•
Try quitting the browser and launching it again.
•
Make sure that you are using the correct login information. The gateway user name is
admin,
and
the default password is
password
, both in lower case letters. (Caps Lock
should be off when you enter these.)
If the gateway does not save changes you have made, check the following:
•
When entering configuration settings, be sure to click the
Apply
button before moving to
another screen, or your changes are lost.
•
Click the
Refresh
or
Reload
button in the web browser. The changes might have
occurred, but the web browser might be caching the old configuration.
T
roubleshoot the ISP Connection
If your gateway is unable to access the Internet and your Internet LED is on, you might need
to register the cable MAC address or device MAC address of your gateway with your cable
service provider.
Additionally, your computer might not have the gateway configured as its TCP/IP gateway. If
your computer obtains its information from the gateway by DHCP, reboot the computer and
verify the gateway address. For more information, see
Reserve an IP Address for DHCP Use
on page
44.
T
roubleshoot a TCP/IP Network Using a Ping Utility
Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request
packet to the designated device. The device then responds with an echo reply. You can

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