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Page 81 / 167 Scroll up to view Page 76 - 80
Chapter 7.
Advanced Settings
|
81
N300 Wireless ADSL2+ Modem Router DGN2200
Wireless Card Access List
The Wireless Card Access List lets you restrict access to your network to a specific list of
devices based on their MAC addresses. This section explains how to set up the list.
1.
Select
Advanced > Wireless Settings
, and click the
Setup Access List
button to
display the Wireless Card Access List screen:
The Turn Access Control On check box is not selected so that any computer configured
with the correct wireless network name (SSID) and passphrase to access the network.
2.
Select the
Turn Access Control On
check box to enable access restriction by MAC
address.
3.
Click
Add
to add your computer’s MAC address so that you do not lose your wireless
connection when you click Apply. If you lose your wireless connection, you have to access
the wireless modem router from a wired computer or from a wireless computer that is on the
access control list. The following screen displays:
4.
If a wireless station that you want to add is connected to the network, select it from the
Available Wireless Cards list and click
Add
.
5.
You can enter MAC addresses manually. The MAC address is usually printed on the
wireless computer or device, or it might be in the modem router’s DHCP table. The MAC
address is 12
hexadecimal digits.
You can copy and paste the MAC addresses from the modem router’s Attached Devices
screen (see
View Attached Devices
on page
60) into the MAC Address field. This screen
shows computers connected to the network.
6.
Click
Apply
to save your settings.
Page 82 / 167
82
|
Chapter 7.
Advanced Settings
N300 Wireless ADSL2+ Modem Router DGN2200
Remote Management
The Remote Management screen lets you allow a user or users on the Internet to configure,
upgrade, and check the status of your modem router.
1.
Select
Advanced > Remote
Management
to display this screen:
2.
Select the
Turn Remote Management
On
check box.
3.
Specify the external addresses that can
access remote management. For
security, restrict access to as few
external IP addresses as practical.
Select a radio button:
•
Only This Computer
. Allow
access from a single IP address
on the Internet.
•
IP Address Range
. Allow access
from a range of IP addresses on
the Internet.
•
IP Address List
. Enter each IP
address that should have access.
•
Everyone
. Allow access from any
IP address on the Internet.
4.
Specify the port number to be used for
accessing the modem router interface.
Web browser access usually uses the
standard HTTP service port 80. For
greater security, you can change it so the remote modem router interface uses a custom
port by entering that number in the field 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.
5.
Click
Apply
to save your changes.
To access your modem router from the Internet, type your modem router’s WAN IP
address in your browser’s Address field, followed by a colon (:) and the custom port
number. For example, if your external address is 134.177.0.123 at port number 8080,
enter the following in your browser:
.
Note:
The http:// has to be included in the address.
Page 83 / 167
Chapter 7.
Advanced Settings
|
83
N300 Wireless ADSL2+ Modem Router DGN2200
Static Routes
Static routes provide additional routing information to your modem router. Under normal
circumstances, the modem router has adequate routing information after it has been
configured for Internet access, and you do not need to configure additional static routes. You
configure static routes only for unusual cases such as multiple routers or multiple IP subnets
located on your network.
Static Route Example
As an example of when a static route is needed, consider the following case:
•
Your primary Internet access is through a cable modem to an ISP.
•
You have an ISDN router on your home network for connecting to the company where
you are employed. This router’s address on your LAN is 192.168.0.100.
•
Your company’s network address is 134.177.0.0.
When you first configured your modem router, two implicit static routes were created. A
default route was created with your ISP as the modem router, and a second static route was
created to your local network for all 192.168.0.x addresses. With this configuration, if you
attempt to access a device on the 134.177.0.0 network, your modem router forwards your
request to the ISP. The ISP forwards your request to the company where you are employed,
and the request is likely to be denied by the company’s firewall.
In this case you need to define a static route,
telling your modem router that 134.177.0.0
should be accessed through the ISDN router
.
In this example:
•
The Destination IP Address and IP
Subnet Mask fields specify that this static
route applies to all 134.177.x.x
addresses.
•
The Gateway IP Address field specifies
that all traffic for these addresses is to be
forwarded to the ISDN router at
192.168.0.100.
•
The value in the Metric field represents
the number of routers between your
network and the destination. This is a direct connection, so it can be set to the minimum
value of 2.
•
The Private check box is selected only as a precautionary security measure in case RIP
is activated.
Page 84 / 167
84
|
Chapter 7.
Advanced Settings
N300 Wireless ADSL2+ Modem Router DGN2200
Add a Static Route
1.
Select
Advanced > Static Routes
to display the following screen:
2.
Click
Add
to open the following screen.
3.
Fill in the fields:
•
In the Route Name field, enter a route name for this static route. This name is for
identification purpose only.
•
Select
Private
if you want to limit access to the LAN only. The static route will not be
reported in RIP.
•
Select
Active
to make this route effective.
•
Enter the destination IP address of the final destination.
•
Enter the IP subnet mask for this destination. If the destination is a single host, type
255.255.255.255
.
•
Enter the gateway IP address, which has to be a router on the same LAN segment as
the modem router.
•
In the Metric field, enter a number between 2 and 15 as the metric value. This
represents the number of routers between your network and the destination. Usually,
a setting of 2 or 3 works.
4.
Click
Apply
to save your changes. The Static Routes table is updated to show the new
entry.
Page 85 / 167
Chapter 7.
Advanced Settings
|
85
N300 Wireless ADSL2+ Modem Router DGN2200
Universal Plug and Play
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.
1.
Select
Advanced > UPnP
to display the following screen:
2.
Specify the settings as follows:
•
Turn UPnP On
. UPnP can be enabled or disabled for automatic device configuration.
The default setting for UPnP is enabled. If UPnP is disabled, the modem router does
not allow any device to automatically control the resources, such as port forwarding
(mapping), of the modem router.
•
Advertisement Period
. The advertisement period is how often the modem router
advertises (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 additional network traffic. Longer
durations might compromise the freshness of the device status but can significantly
reduce network traffic.
•
Advertisement Time to Live
. This is measured in hops (steps) for each UPnP packet
sent. A hop is the number of steps allowed to propagate for each UPnP
advertisement before it disappears. The number of hops can range from 1 to 255. The
default value is 4 hops, which works for most home networks. If you notice that some
devices are not being updated or reached correctly, you might need to increase this
value a little.
•
UPnP Portmap Table
. The UPnP Portmap Table displays the IP address of each
UPnP device that is currently 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 opened and if that port is still active for each IP address.
3.
To save, cancel your changes, or refresh the table:
•
Click
Apply
to save the new settings to the modem router.
•
Click
Cancel
to disregard any unsaved changes.
•
Click
Refresh
to update the portmap table and to show the active ports that are
currently opened by UPnP devices.

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