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Configure Advanced Features
141
AC1900, N900, and N450 WiFi
Cable Data Gateways
The Dynamic DNS screen displays.
7.
Select the
Use a Dynamic DNS Service
check box.
The selection from the
Service Provider
menu is fixed at
www.DynDNS.org
.
8.
In the
Host Name
field, type the host or domain name that your Dynamic DNS service
provider gave you.
9.
In the
User Name
field, type the user name for your Dynamic DNS account.
This is the name that you use to log in to your account, not your host name.
10.
In the
Password
field, type the password or key for your Dynamic DNS account.
11.
Click the
Apply
button.
Your settings are saved.
12.
To see the connection status with the DDNS server, click the
Show Status
button.
A pop-up window displays.
Manage the Cable Data Gateway Remotely
The remote management feature lets you update or check the status of your cable data
gateway over the Internet. For enhanced security, restrict access to as few external IP
addresses as practical.
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Cable Data Gateways
Note:
Be sure to change the cable data gateway default login password to a
secure password. For more information, see
Change the Password
on page
25.
To set up remote management:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Advanced Setup > Remote Management
.
The Remote Management screen displays.
6.
Select the
Turn Remote Management On
check box.
7.
Specify the external IP address or addresses from which the cable data gateway can be
managed remotely:
To specify access for a single IP address on the Internet:
a.
Select the
Only This Computer
radio button.
b.
Enter the IP address from which access is allowed.
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Configure Advanced Features
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AC1900, N900, and N450 WiFi
Cable Data Gateways
To specify access for a range of IP addresses on the Internet:
a.
Select
IP Address Range
radio button.
b.
In the
From
field, enter the start IP address of the range from which access is
allowed.
c.
In the
To
field, enter the end IP address of the range from which access is
allowed.
To specify access for all IP addresses on the Internet, keep the
Everyone
radio
button selected.
This is the default setting.
8.
In the
Port Number
field, 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.
9.
Click the
Apply
button.
Your changes are saved. After a while, the external IP address and port number display
in the
Remote Management Address
field.
When you access your cable data gateway from the Internet, type your cable data gateway’s
external (WAN) IP address in your browser’s address or location field followed by a colon (:)
and the custom port number. For example, if your external address is 203.0.113.123 and you
use port number 8080, enter
in your browser.
Manage Universal Plug and Play
Universal Plug and Play (UPnP) enables devices, such as Internet devices 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.
If you use applications such as multiplayer gaming, peer-to-peer connections, or real-time
communications such as instant messaging or remote assistance, best practise is to keep
UPnP enabled, which is the default setting.
To manage Universal Plug and Play:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
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Configure Advanced Features
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Cable Data Gateways
The BASIC Home screen displays.
5.
Select
ADVANCED > Advanced Setup >
UPnP
.
The UPnP screen displays.
The UPnP Portmap Table displays the IP address of each UPnP device that is accessing
the cable data gateway and which internal and external ports that device opened. The
UPnP Portmap Table also displays what type of port (that is, the protocol that is
associated with port) is open and whether that port is still active for each IP address.
6.
To turn off UPnP, clear the
Turn UPnP On
check box.
By default, this check box is selected. If you clear the
Turn UPnP On
check box, the
cable data gateway does not allow any device to automatically control the resources,
such as port forwarding (mapping), of the cable data gateway.
7.
To change the advertisement period, in the
Advertisement Period
field, enter a new period
in minutes.
The advertisement period specifies how often the cable data gateway 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 can obtain current device status
at the expense of additional network traffic. Longer durations can compromise the
freshness of the device status but can significantly reduce network traffic.
8.
To change the advertisement time to live value, in the
Advertisement Time to Live
field,
enter a new value in hops.
The time to live for the advertisement is measured in hops (steps) for each UPnP packet
sent. Hops are the steps a packet takes between routers. The number of hops can range
from 1 to 255. The default value for the advertisement time to live is 4 hops, which is fine
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Cable Data Gateways
for most home networks. If you notice that some devices are not being updated or
reached correctly, it might be necessary to increase this value.
9.
Click the
Apply
button.
Your settings are saved.
10.
To refresh the information in the UPnP Portmap Table, click the
Refresh
button.
The information onscreen is updated.
Manage the Network Address Translation
Network Address Translation (NAT) determines how the cable data gateway processes
inbound traffic. 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 devices on your LAN. Leave NAT enabled to allow
multiple devices on your network to access the Internet using a single public IP address. NAT
is enabled by default.
Situations might occur in which you want to disable NAT.
To manage NAT:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Advanced Setup >
NAT Mode
.
The NAT screen displays.
By default, the
Turn NAT On
check box is selected.
6.
To disable NAT, clear the
Turn NAT On
check box.

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