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N600 Wireless Dual Band Router WNDR3400 User Manual
Customizing Your Network Settings
5-19
v1.0, August 2010
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.
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.
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
“Universal Plug and Play” on page 6-13
.
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Page 92 / 149
N600 Wireless Dual Band Router WNDR3400 User Manual
Customizing Your Network Settings
5-20
v1.0, August 2010
2.
Select the
Port Triggering
radio button. The port triggering information displays.
3.
Clear the
Disable Port Triggering
check box.
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.
Figure 5-8
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.
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Page 93 / 149
N600 Wireless Dual Band Router WNDR3400 User Manual
Customizing Your Network Settings
5-21
v1.0, August 2010
5.
Click
Add Service
.
6.
In the
Service Name
field, type 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
or both (
TCP/UDP
). If you are not sure, select
TCP/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.
11.
Click
Apply
. The service appears in the Port Triggering Portmap table.
Figure 5-9
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Page 94 / 149
N600 Wireless Dual Band Router WNDR3400 User Manual
Customizing Your Network Settings
5-22
v1.0, August 2010
Wireless Repeating (Also Called WDS)
The WNDR3400 router can be used with a wireless access point (AP) to build large bridged
wireless networks. Wireless repeating is a type of Wireless Distribution System (WDS).
The following figure shows a wireless repeating scenario:
To set up a wireless network using WDS,
t
he following conditions must be met for both APs:
•
Both APs must use the same SSID, wireless channel, and encryption mode (see
“Manually
Configuring Your Wireless Settings” on page 2-4
or
“Using Push 'N' Connect (WPS) to
Configure Your Wireless Network” on page 2-11
).
•
Both APs must be on the same LAN IP subnet. That is, all the AP LAN IP addresses are in the
same network.
•
All LAN devices (wired and wireless computers) must be configured to operate in the same
LAN network address range as the APs.
Warning:
If you use the wireless repeating function, your options for wireless security
are limited to None or WEP. For more information about wireless security, see
Chapter 2, “Safeguarding Your Network.”
Figure 5-10
Repeater AP
Base Station AP
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Page 95 / 149
N600 Wireless Dual Band Router WNDR3400 User Manual
Customizing Your Network Settings
5-23
v1.0, August 2010
Wireless Repeating Function
You can view or change wireless repeater settings for the wireless router. From the main menu of
the browser interface, under Advanced, click
Wireless Repeating Function
to display the
Wireless Repeating Function screen.
For each wireless radio (2.4GHz and 5GHz), the wireless router supports two modes of the
wireless repeating function, and allows you to control wireless client association:
•
Wireless Repeater
. The wireless router sends all traffic from its local wireless or wired
computers to a remote AP. To configure this mode, you must know the MAC address of the
remote parent AP.
•
Wireless Base Station
. The wireless router acts as the parent AP, bridging traffic to and from
the child repeater AP, as well as handling wireless and wired local computers. To configure
this mode, you must know the MAC addresses of the child repeater AP.
•
Disable Wireless Client Association
. Usually this check box is cleared so that the router is an
access point for wireless computers.
Figure 5-11
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