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Page 76 / 124 Scroll up to view Page 71 - 75
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
5-16
Customizing Your Network Settings
v1.0, May 2009
Configuring Port Forwarding to Local Servers
Using the port forwarding feature, you can allow certain types of incoming traffic to reach servers
on your local network. For example, you might make a local Web server, FTP server, or game
server visible and available to the Internet.
Use the Port Forwarding screen to configure the router to forward specific incoming protocols to
computers on your local network. In addition to servers for specific applications, you can also
specify a default DMZ server to which all other incoming protocols are forwarded. The DMZ
server is configured in the WAN Setup screen, as discussed in
“Setting Up a Default DMZ Server”
on page 5-8
.
Before starting, you need to determine which type of service, application, or game you will
provide, and the local IP address of the computer that will provide the service. Be sure the
computer’s IP address never changes.
To configure port forwarding to a local server:
1.
Select
Port Forwarding/Port Triggering
under Advanced in the main menu.
Tip:
To ensure that your server computer always has the same IP address, use the
reserved IP address feature of your WNR3500v2 router. See
“Using Address
Reservation” on page 5-4
for instructions on how to use reserved IP addresses.
Figure 5-6
Page 77 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
Customizing Your Network Settings
5-17
v1.0, May 2009
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
box, enter the last digit of the IP address of your local
computer that will provide this service.
4.
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.
2.
Click
Add Custom Service
.
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 5-7
Page 78 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
5-18
Customizing Your Network Settings
v1.0, May 2009
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
.
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 5-4
. 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 5-5
.
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 79 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
Customizing Your Network Settings
5-19
v1.0, May 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.
2.
Select the
Port Triggering
radio button. The port triggering information 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
“Using Universal Plug and Play” on page 6-13
.
Figure 5-8
Page 80 / 124
NETGEAR RangeMax™ Wireless-N Gigabit Router WNR3500v2 User Manual
5-20
Customizing Your Network Settings
v1.0, May 2009
3.
Clear the
Disable Port Triggering
check box.
4.
In the
Port Triggering Timeout
field, enter a value up to 9999 minutes. This value sets the
inactivity timer for the designated inbound ports. These ports close when the timer expires.
This is required because the router cannot be sure when the application has terminated.
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.
Note:
If the
Disable Port Triggerin
g 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.
Figure 5-9

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