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Page 86 / 144 Scroll up to view Page 81 - 85
NETGEAR Wireless-N 300 Router WNR2000v2 User Manual
Fine-Tuning Your Network
5-7
v1.0, January 2010
To configure port forwarding to a local server:
1.
Select
Port Forwarding/Port Triggering
under Advanced in the main menu. The Port
Forwarding/Port Triggering screen displays.
2.
From the
Service Name
list, select the service or game that you will host on your network.
If the service does not appear in the list, see the following section,
“Adding a Custom
Service
.”
3.
In the corresponding
Server IP Address
fields, enter the last digit of the IP address of your
local computer that will provide this service.
4.
To the right of Server IP Address, click
Add
. The service appears in the list in the screen.
Adding a Custom Service
To define a service, game, or application that does not appear in the Service Name list, you must
first determine which port number or range of numbers is used by the application. You can usually
determine this information by contacting the publisher of the application or user groups or
newsgroups. When you have the port number information, follow these steps:
1.
Select
Port Forwarding/Port Triggering
under Advanced in the main menu.
Figure 5-1
Page 87 / 144
NETGEAR Wireless-N 300 Router WNR2000v2 User Manual
Fine-Tuning Your Network
5-8
v1.0, January 2010
2.
Click
Add Service
(see
Figure 5-1 on page 5-7
).The Ports–Custom Services screen displays.
3.
In the
Service Name
field, enter a descriptive name.
4.
In the
Service Type
field, select the protocol. If you are unsure, select
TCP/UDP
.
5.
In the
Starting Port
field, enter the beginning port number.
•
If the application uses only a single port, enter the same port number in the
Ending Port
field.
•
If the application uses a range of ports, enter the ending port number of the range in the
Ending Port
field.
6.
In the
Server IP Address
field, enter the IP address of your local computer that will provide
this service.
7.
Click
Apply
. The service appears in the list in the Port Forwarding/Port Triggering screen.
Figure 5-2
Page 88 / 144
NETGEAR Wireless-N 300 Router WNR2000v2 User Manual
Fine-Tuning Your Network
5-9
v1.0, January 2010
Editing or Deleting a Port Forwarding Entry
To edit or delete a port forwarding entry:
1.
In the table, select the button next to the service name.
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 4-5
. 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 4-6
.
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.
Figure 5-3
Page 89 / 144
NETGEAR Wireless-N 300 Router WNR2000v2 User Manual
Fine-Tuning Your Network
5-10
v1.0, January 2010
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.
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
).
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 5-14
.
Page 90 / 144
NETGEAR Wireless-N 300 Router WNR2000v2 User Manual
Fine-Tuning Your Network
5-11
v1.0, January 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 5-4
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.

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