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159
13
13.
Specify Internet Port Settings
You can use port forwarding and port triggering to set up rules for Internet traffic. You need
networking knowledge to set up these features.
This chapter includes the following sections:
•
Set Up Port Forwarding to a Local Server
•
Set Up Port Triggering
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Set Up Port Forwarding to a Local Server
If your home network includes a server, you can allow certain types of incoming traffic to
reach the server. For example, you might want to make a local web server, FTP server, or
game server visible and available to the Internet.
The router can forward incoming traffic with specific protocols to computers on your local
network. You can specify the servers for applications and you can also specify a default DMZ
server to which the router forwards all other incoming protocols.
To forward specific incoming protocols:
1.
Decide which type of service, application, or game you want to provide.
2.
Find the local IP address of the computer on your network that will provide the service.
The server computer must always use the same IP address. To specify this setting, use
the reserved IP address feature. See
Manage Reserves LAN IP Addresses
on page
114.
3.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
4.
Type
or
.
A login window opens.
5.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
6.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
7.
Leave the
Port Forwarding
radio button selected as the service type.
8.
In the
Service Name
menu, select the service name.
If the service that you want to add is not in the menu, create a custom service. See
Add a
Custom Port Forwarding Service
on page
161.
9.
In the
Server IP Address
field, enter the IP address of the computer that will provide the
service.
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Specify Internet Port Settings
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10.
Click the
Add
button.
The service displays in the menu.
Add a Custom Port Forwarding Service
To add a custom service:
1.
Find out which port number or range of numbers the application uses.
You can usually find this information by contacting the publisher of the application or user
groups or news groups.
2.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
3.
Type
or
.
A login window opens.
4.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
5.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
The Port Forwarding/Port Triggering page displays.
6.
Leave the
Port Forwarding
radio button selected as the service type.
7.
Click the
Add Custom Service
button.
8.
In the
Service Name
field, enter a descriptive name.
9.
In the
Service Type
field, select the protocol.
If you are unsure, select
TCP/UDP
.
10.
In the
External Starting Port
field, enter the beginning port number.
If the application uses a single port, enter the same port number in the
External Ending
Port
field.
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If the application uses a range of ports, enter the ending port number of the range in the
External Ending Port
field.
11.
Specify the internal ports by one of these methods:
•
Leave the
Use the same port range for Internal port
check box selected.
•
Type the port numbers in the
Internal Starting Port
and
Internal Ending Port
fields.
12.
Type the IP address in the
Internal IP address
field or select the radio button for an
attached device listed in the table.
13.
Click the
Apply
button.
The service is now in the list on the Port Forwarding/Port Triggering page.
Edit a Port Forwarding Service
To edit a port forwarding entry:
1.
Launch a web browser from a computer or wireless device that is connected to the
network.
2.
Enter
or
in the address field of the
web browser.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
4.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
The Port Forwarding/Port Triggering page displays.
5.
Leave the
Port Forwarding
radio button selected as the service type.
6.
In the table, select the radio button next to the service name.
7.
Click the
Edit Service
button.
The Ports - Custom Services page displays.
8.
Change the settings as needed.
9.
Click the
Apply
button.
Your changes are saved.
Delete a Port Forwarding Entry
To delete a port forwarding entry:
1.
Launch a web browser from a computer or wireless device that is connected to the
network.
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2.
Enter
or
in the address field of the
web browser.
A login window opens.
3.
Enter the router user name and password.
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home page displays.
4.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
The Port Forwarding/Port Triggering page displays.
5.
Leave the
Port Forwarding
radio button selected as the service type.
6.
In the table, select the radio button next to the service name.
7.
Click the
Delete Service
button.
The service is deleted.
Application Example: Make 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.
In this example, your router always gives your web server an IP address of 192.168.1.33.
2.
In the Port Forwarding/Port Triggering page, 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 specify that name in the
Dynamic DNS page of the router.
Dynamic DNS makes it much easier to access a server from the Internet because you
can type the name in the Internet browser. Otherwise, you must know the IP address that
the ISP assigned, which typically changes.
How the Router Implements the Port Forwarding Rule
The following sequence shows the effects of a port forwarding rule:
1.
When you type the URL www.example.com in your browser, the browser sends a web
page request message with the following destination information:
•
Destination address
. The IP address of www.example.com, which is the address of
your router.

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