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Page 146 / 169 Scroll up to view Page 141 - 145
Specify Internet Port Settings
146
Nighthawk AC1900
Smart
WiFi
Router Model
R7000
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
Set Up Address Reservation
on page
84.
3.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
4.
Type
or
.
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
147.
Page 147 / 169
Specify Internet Port Settings
147
Nighthawk AC1900
Smart
WiFi
Router Model
R7000
9.
In the Server IP Address field, enter the IP address of the computer that will provide the
service.
10.
Click the
Add
button.
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 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 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
.
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 Ending Port field.
Page 148 / 169
Specify Internet Port Settings
148
Nighthawk AC1900
Smart
WiFi
Router Model
R7000
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 screen.
Edit a Port Forwarding Service
To edit a port forwarding entry:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
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
.
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 to any of the following settings:
•
Service Name
. Type the service name.
•
Service Type
. If you are unsure, select
TCP/UDP
.
•
External Starting Port
: If the application uses a single port, enter the same port
number in the
External Ending Port
field. If the application uses a range of ports,
enter the ending port number of the range in the
External Ending Port
field.
•
For the internal ports, leave the
Use the same port range for Internal port
check
box selected.
•
Internal IP address
. Type the IP address in the Internal IP address field, or select the
radio button for an attached device listed in the table.
9.
Click the
Apply
button.
Your changes are saved.
Page 149 / 169
Specify Internet Port Settings
149
Nighthawk AC1900
Smart
WiFi
Router Model
R7000
Delete a Port Forwarding Entry
To delete a port forwarding entry:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.
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
.
5.
Select the
Port Forwarding
radio button as 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 192.168.1.33.
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
192.168.1.33
.
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 screen 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:
Page 150 / 169
Specify Internet Port Settings
150
Nighthawk AC1900
Smart
WiFi
Router Model
R7000
•
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.
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 must use port forwarding to more than one local computer (but not
simultaneously).
•
An application must open 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 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
49.
Add a Port Triggering Service
To add a port triggering service:
1.
Launch an Internet browser from a computer or wireless device that is connected to the
network.
2.
Type
or
.

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