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Page 76 / 122 Scroll up to view Page 71 - 75
Wireless-N 150 Router WNR1000v2 User Manual
Fine-Tuning Your Network
5-9
v1.0, November 2009
2.
Click
Edit Service
or
Delete Service
to make changes.
3.
Click
Apply
.
Application Example: Making a Local Web Server Public
If you host a Web server on your local network, you can use port forwarding to allow Web
requests from anyone on the Internet to reach your Web server.
To make a local Web server public:
1.
Assign your Web server either a fixed IP address or a dynamic IP address using DHCP address
reservation, as explained in
“Using Address Reservation” on page 4-4
. In this example, your
router will always give your Web server an IP address of 192.168.1.33.
2.
In the Port Forwarding screen, configure the router to forward the HTTP service to the local
address of your Web server at
192.168.1.33
.
HTTP (port 80) is the standard protocol for Web servers.
3.
(Optional) Register a host name with a Dynamic DNS service, and configure your router to
use the name as described in
“Using a Dynamic DNS Service” on page 4-5
.
To access your Web server from the Internet, a remote user must know the IP address that has
been assigned by your ISP. However, if you use a Dynamic DNS service, the remote user can
reach your server by a user-friendly Internet name, such as mynetgear.dyndns.org.
Configuring Port Triggering
Port triggering is a dynamic extension of port forwarding that is useful in these cases:
•
More than one local computer needs port forwarding for the same application (but not
simultaneously).
•
An application needs to open incoming ports that are different from the outgoing port.
When port triggering is enabled, the router monitors outbound traffic looking for a specified
outbound “trigger” port. When the router detects outbound traffic on that port, it remembers the IP
address of the local computer that sent the data. The router then temporarily opens the specified
incoming port or ports, and forwards incoming traffic on the triggered ports to the triggering
computer.
Page 77 / 122
Wireless-N 150 Router WNR1000v2 User Manual
Fine-Tuning Your Network
5-10
v1.0, November 2009
While port forwarding creates a static mapping of a port number or range to a single local
computer, port triggering can dynamically open ports to any computer that needs them and can
close the ports when they are no longer needed.
To configure port triggering, you need to know which inbound ports the application needs. Also,
you need to know the number of the outbound port that will trigger the opening of the inbound
ports. You can usually determine this information by contacting the publisher of the application or
user groups or newsgroups.
To set up port triggering:
1.
Select
Port Forwarding/Port Triggering
under Advanced in the main menu. The
Forwarding/Port Triggering screen displays (see
Figure 5-1 on page 5-7
).
2.
Select the
Port Triggering
radio button. The port triggering information displays.
3.
Clear the
Disable Port Triggering
check box.
Note:
If you use applications such as multiplayer gaming, peer-to-peer connections, real-
time communications such as instant messaging, or remote assistance (a feature in
Windows XP), you should also enable Universal Plug and Play (UPnP) according
to the instructions in
“Using Universal Plug and Play” on page 5-12
.
Figure 5-4
Note:
If the Disable Port Triggering check box is selected after you configure port
triggering, port triggering is disabled. However, any port triggering
configuration information you added to the router is retained even though it is
not used.
Page 78 / 122
Wireless-N 150 Router WNR1000v2 User Manual
Fine-Tuning Your Network
5-11
v1.0, November 2009
4.
In the
Port Triggering Timeout
field, enter a value up to 9999 minutes. This value controls
the inactivity timer for the designated inbound ports. The inbound ports close when the
inactivity time expires. This is required because the router cannot be sure when the application
has terminated.
5.
Click
Add
. the Port Triggering–Services screen displays.
6.
In the
Service Name
field, enter a descriptive service name.
7.
In the
Service User
field, select
Any
(the default) to allow this service to be used by any
computer on the Internet. Otherwise, select
Single address
, and enter the IP address of one
computer to restrict the service to a particular computer.
8.
Select the service type, either
TCP
or
UDP
.
9.
In the
Triggering Port
field, enter the number of the outbound traffic port that will cause the
inbound ports to be opened.
10.
Enter the inbound connection port information in the
Connection Type
,
Starting Port
, and
Ending Port
fields.
Figure 5-5
Page 79 / 122
Wireless-N 150 Router WNR1000v2 User Manual
Fine-Tuning Your Network
5-12
v1.0, November 2009
11.
Click
Apply
. The service appears in the Port Triggering Portmap table.
Using 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.
To turn on Universal Plug and Play:
Figure 5-6
Note:
If you use applications such as multiplayer gaming, peer-to-peer connections, real-
time communications such as instant messaging, or remote assistance (a feature in
Windows XP), you should enable UPnP.
Page 80 / 122
Wireless-N 150 Router WNR1000v2 User Manual
Fine-Tuning Your Network
5-13
v1.0, November 2009
1.
Select
UPnP
under Advanced the main menu. The UPnP screen displays.
2.
The available settings and information displayed in this screen are:
•
Turn UPnP On
. UPnP can be enabled or disabled for automatic device configuration.
The default setting for UPnP is disabled. If this check box is not selected, the router does
not allow any device to automatically control the resources, such as port forwarding
(mapping) of the router.
•
Advertisement Period
. The advertisement period is how often the 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 additional network traffic. Longer durations might compromise the freshness
of the device status but can significantly reduce network traffic.
•
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 4 hops, which should be fine for most home networks. If you
notice that some devices are not being updated or reached correctly, then it might be
necessary to increase this value.
•
UPnP Portmap Table
. The UPnP Portmap Table displays the IP address of each UPnP
device that is currently accessing the 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
Apply
to save your settings.
Figure 5-7

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