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Page 91 / 113 Scroll up to view Page 86 - 90
Specify Internet Port Settings
91
N300 WiFi Router
Set Up Port Forwarding to a Local Server
If you have a server in your home network, 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 have the same IP address. To specify this setting, use
the reserved IP address feature. See
Reserve LAN IP Addresses
on page
60.
3.
Launch a web browser from a computer or wireless device that is connected to the network.
4.
Type
www.routerlogin.net
or
www.routerlogin.com
.
A login screen displays.
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 screen 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
list, select the service name.
If the service that you want to add is not in the list, create a custom service. See
Add a
Custom Port Forwarding Service
on page
92.
9.
In the
Server IP Address
field, enter the IP address of the computer that will provide the
service.
10.
Click the
Add
button.
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Specify Internet Port Settings
92
N300 WiFi Router
The service displays in the list.
Add a Custom Port Forwarding Service
To add a custom service:
1.
Find out which port number or range of numbers the service or application uses.
You can usually find this information by contacting the publisher of the application or user
groups or news groups.
2.
Launch a web browser from a computer or wireless device that is connected to the network.
3.
In the address field of the web browser, enter
www.routerlogin.net
or
www.routerlogin.com
.
A login screen displays.
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 screen displays.
5.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
The Port Forwarding/Port Triggering screen 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
Protocol
field, select the protocol. If you are unsure, select
TCP/UDP
.
10.
In the
External port range
field, enter the port numbers.
11.
Use one of the following methods to specify the internal port numbers:
•
Leave
Use the same port range for internal port
check box selected.
•
Type the port numbers in the
Internal port range
field.
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Specify Internet Port Settings
93
N300 WiFi Router
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 screen.
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.
In the address field of the web browser, enter
www.routerlogin.net
or
www.routerlogin.com
.
A login screen displays.
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 screen displays.
4.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
The Port Forwarding/Port Triggering screen 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 screen displays.
8.
Specify changes 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.
2.
In the address field of the web browser, enter
www.routerlogin.net
or
www.routerlogin.com
.
A login screen displays.
3.
Enter the router user name and password.
Page 94 / 113
Specify Internet Port Settings
94
N300 WiFi Router
The user name is
admin
. The default password is
password
. The user name and
password are case-sensitive.
The BASIC Home screen displays.
4.
Select
ADVANCED > Advanced Setup > Port Forwarding/Port Triggering
.
5.
Leave the
Port Forwarding
radio button selected the service type.
6.
In the table, select the radio button next to the service name.
7.
Click the
Delete Service
button.
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 192.168.0.33.
2.
In the Port Forwarding/Port Triggering screen, configure the router to forward the HTTP
service to the local address of your web server at
192.168.0.33
.
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 screen of the router.
For more information, see
Dynamic DNS
on page
73.
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 Internet provider 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.
•
Destination port number
. 80, which is the standard port number for a web server
process.
2.
Your router receives the message and finds your port forwarding rule for incoming port 80
traffic.
3.
The router changes the destination in the message to IP address 192.168.1.123 and sends
the message to that computer.
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Specify Internet Port Settings
95
N300 WiFi Router
4.
Your web server at IP address 192.168.1.123 receives the request and sends a reply
message to your router.
5.
Your router performs Network Address Translation (NAT) on the source IP address, and
sends the reply through the Internet to the computer or wireless device that sent the web
page request.
Set Up Port Triggering
Port triggering is a dynamic extension of port forwarding that is useful in these cases:
•
An application uses port forwarding to more than one local computer (but not
simultaneously).
•
An application opens incoming ports that are different from the outgoing port.
With port triggering, the router monitors traffic to the Internet from an outbound “trigger” port
that you specify. For outbound traffic from that port, the router saves the IP address of the
computer that sent the traffic. The router temporarily opens the incoming port or ports that
you specify in your rule, and forwards that incoming traffic to that destination.
Port forwarding creates a static mapping of a port number or range of ports to a single local
computer. Port triggering can dynamically open ports to any computer when needed and
close the ports when they are no longer needed.
Note:
If you enabled port triggering because 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), enable Universal Plug and Play (UPnP). See
Improve Network Connections with Universal Plug and Play
on
page
41.
Add a Port Triggering Service
To add a port triggering service:
1.
Launch a web browser from a computer or wireless device that is connected to the
network.
2.
In the address field of the web browser, enter
www.routerlogin.net
or
www.routerlogin.com
.
A login screen displays.
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 screen displays.

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