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Page 61 / 76 Scroll up to view Page 56 - 60
Advanced Settings
61
WiFi Cable Modem Router C3700
The following screen displays:
2.
Register for an account with one of the Dynamic DNS service providers whose names
display in the Service Provider list.
3.
Select the
Use a Dynamic DNS Service
check box.
4.
Select the name of your Dynamic DNS service provider. If your Dynamic DNS service
provider is DynDNS.org, for example, select
www.dyndns.org
.
5.
Type the host name (or domain name) that your Dynamic DNS service provider gave you.
6.
Type the user name for your Dynamic DNS account. This name is the name that you use to
log in to your account, not your host name.
7.
Type the password (or key) for your Dynamic DNS account.
8.
Click the
Apply
button.
Your configuration is saved.
Remote Management
The remote management feature lets you access your modem router over the Internet to
view or change its settings.
Note:
Be sure to change the modem router default login password to a
secure password. The ideal password contains no dictionary words
from any language and contains uppercase and lowercase letters,
numbers, and symbols. It can be up to 30 characters. See
Set
Password
on page
41.
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Advanced Settings
62
WiFi Cable Modem Router C3700
To set up remote management:
1.
From the Advanced tab, select
Advanced Setup > Remote Management
.
2.
Select the
Turn Remote Management On
check box.
3.
Under Allow Remote Access By, specify the external IP addresses to be allowed to access
the modem router’s remote management.
Note:
For enhanced security, restrict access to as few external IP addresses
as practical.
•
To allow access from a single IP address on the Internet, select
Only This
Computer
. Enter the IP address that will be allowed access.
•
To allow access from a range of IP addresses on the Internet, select
IP Address
Range
. To define the allowed range, enter a beginning and ending IP address.
•
To specify IP addresses, select
IP Address List
and type in the allowed IP
addresses.
•
To allow access from any IP address on the Internet, select
Everyone
.
4.
Specify the port number for accessing the web management interface.
Normal web browser access uses the standard HTTP service port 80. For greater
security, enter a custom port number for the remote web management interface. Choose
a number from 1024 to 65535, but do not use the number of any common service port.
The default is 8080, which is a common alternate for HTTP.
5.
Click the
Apply
button.
Your changes take effect.
6.
When you access your modem router from the Internet, type your modem router’s WAN IP
address into your browser’s address or location field followed by a colon (:) and the custom
port number.
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Advanced Settings
63
WiFi Cable Modem Router C3700
For example, if your external address is 134.177.0.123 and you use port number 8080,
enter
in your browser.
Universal Plug and Play
Universal Plug and Play (UPnP) helps devices, such as Internet appliances and computers,
to 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.
Note:
If you use applications such as multiplayer gaming, peer-to-peer
connections, or real-time communications such as instant
messaging or remote assistance (a feature in Windows XP), enable
UPnP.
To turn on Universal Plug and Play:
1.
From the Advanced tab, select
Advanced Setup >
UPnP
.
2.
Specify the following settings:
Turn UPnP On
.
UPnP can be enabled or disabled for automatic device configuration.
The default setting for UPnP is enabled. If this check box is not selected, the modem
router does not allow any device to control the resources automatically, such as port
forwarding (mapping) of the modem router.
Advertisement Period
.
The advertisement period is how often the modem router
broadcasts its UPnP information. This value can range from 1 to 1440 minutes. The
default period is 30 minutes. Shorter durations ensure that control points have current
device status at the expense of more network traffic. Longer durations can compromise
the freshness of the device status, but can significantly reduce network traffic.
Page 64 / 76
Advanced Settings
64
WiFi Cable Modem Router C3700
Advertisement Time to Live
.
The time to live for the advertisement is measured in hops
(steps) for each UPnP packet sent. The time to live hop count is the number of steps a
broadcast packet is 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 four hops, which are fine for most home networks. If you
notice that some devices are not being updated or reached correctly, you should increase
this value.
UPnP Portmap Table
.
The UPnP Portmap Table displays the IP address of each UPnP
device that is accessing the modem router and which ports (internal and external) that
device has opened. The UPnP Portmap Table also displays what type of port is open and
whether that port is still active for each IP address.
3.
Click the
Apply
button.
Your settings are saved.
Page 65 / 76
65
7
7.
Troubleshooting
Find and fix common issues
This chapter gives information about troubleshooting your WiFi Cable Modem Router C3700.
For the common problems listed, go to the section indicated.
•
Have I connected the modem router correctly?
Go to
Basic Functions
on page
65.
•
I cannot access the modem router configuration with my browser.
Go to
Cannot Log In to the Modem Router
on page
66.
•
I have configured the modem router but I cannot access the Internet.
Go to
Troubleshoot the ISP Connection
on page
67.
•
I cannot remember the configuration password of the modem router or I want to clear the
configuration and start over again.
Go to
Factory Default Settings
on page
71.
Tip:
NETGEAR provides helpful articles, documentation, and the latest
software updates at
support.netgear.com
.
Basic Functions
After you have turned on power to the modem router, do the following:
1.
Check to see that the Power LED is on.
2.
Check that the numbered Ethernet LEDs come on momentarily.
3.
After a few seconds, check 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.

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