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Page 126 / 168 Scroll up to view Page 121 - 125
Configure Advanced Features
126
AC1900, N900, and N450 WiFi
Cable Data Gateways
Disable a Service or Application for Port Forwarding
You can disable a port forwarding service or application without removing it from the Port
Forwarding Portmap Table.
To disable a port forwarding service or application:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
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.
In the table, clear the
Enable
check box for the service or application that you want to
disable.
8.
Click the
Apply
button.
The service or application remains in the Port Forwarding Portmap Table but is disabled.
Remove a Service for Port Forwarding
You can remove a service or application that you no longer need for port forwarding.
To remove a port forwarding service or application:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
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.
Page 127 / 168
Configure Advanced Features
127
AC1900, N900, and N450 WiFi
Cable Data Gateways
7.
In the table, select the radio button to the left of the service that you want to remove.
8.
Click the
Delete Service
button.
The service or application is removed from the Port Forwarding Portmap Table.
Note:
A default service or application is not removed from the
Service Name
menu.
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 cable data gateway always gives your web server an IP address of
192.168.0.33.
2.
On the Port Forwarding / Port Triggering screen, configure the cable data gateway 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 configure your cable
data gateway to use the name.
To access your web server from the Internet, a remote user must know the IP address
that your cable service provider assigned. However, if you use a Dynamic DNS service,
the remote user can reach your server by a user-friendly Internet name, such as
mynetgear.dns.com.
Set Up and Manage 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 must open incoming ports that are different from the outgoing port.
When port triggering is enabled, the cable data gateway monitors outbound traffic looking for
a specified outbound “trigger” port. When the cable data gateway detects outbound traffic on
that port, it remembers the IP address of the local computer that sent the data. The cable
data gateway then temporarily opens the specified incoming port or ports and forwards
incoming traffic on the triggered ports to the triggering computer.
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.
Page 128 / 168
Configure Advanced Features
128
AC1900, N900, and N450 WiFi
Cable Data Gateways
Note:
If you use applications such as multiplayer gaming, peer-to-peer
connections, real-time communications such as instant messaging, or
remote assistance, keep Universal Plug and Play (UPnP) enabled for
ease of configuration. For more information, see
Manage Universal
Plug and Play
on page
143.
Manage Port Triggering Services and Applications
To configure port triggering services, you must know which inbound ports the service or
application uses and the number of the outbound port that triggers the opening of the inbound
ports. You can usually find this information by contacting the publisher of the service or
application or through user groups or news groups on the Internet.
Add a Service or Application for Port Triggering
The cable data gateway does not provide default services or applications for port triggering.
You must add each service and application for which you want to set up port triggering.
To add a port triggering service or application and enable or schedule port triggering:
1.
On your computer, launch an Internet browser such as Mozilla Firefox or Microsoft
Internet Explorer.
2.
In the address field of your browser, enter
http://routerlogin.net
.
You are prompted to enter a user name and password.
3.
Type
admin
for the user name and type your password.
If you did not yet personalize your password, type
password
for the password.
4.
Click the
OK
button.
The BASIC Home screen displays.
5.
Select
ADVANCED > Advanced Setup > Port Forwarding / Port Triggering
.
The Port Forwarding / Port Triggering screen displays.
6.
Select the
Port Triggering
radio button.
The screen adjusts.
Page 129 / 168
Configure Advanced Features
129
AC1900, N900, and N450 WiFi
Cable Data Gateways
7.
Click the
Add Service
button.
The Port Triggering - Services screen displays.
8.
Specify the custom service or application.
Page 130 / 168
Configure Advanced Features
130
AC1900, N900, and N450 WiFi
Cable Data Gateways
The following table describes the fields on the Port Triggering - Services screen.
Field
Description
Service
Service Name
Enter a descriptive name.
Service User
From the menu, select if any internal IP address can connect to the service or
application or only a single IP address can connect. If you select
Single address
from the menu, enter the IP address.
Service Type
From the menu, select the correct type of protocol for the service or application
(
TCP
or
UDP
).
Triggering Port
Enter the internal starting port number for the service or application. This number
represents the outbound traffic port that must cause the inbound ports (see
Inbound Connection later in this table) to be opened.
Triggering Ending Port
If the service or application uses a single triggering port, enter the same port
number that you enter in the
Triggering Port
field.
If the service or application uses a range of triggering ports, enter the ending port
number of the range.
Inbound Connection
Starting Port
Enter the starting port number for the inbound connection. This number represents
the inbound traffic port that is triggered open by the triggering port.
Ending Port
If the service or application uses a single ending port for the inbound connection,
enter the same port number that you enter in the
Starting Port
field.
If the service or application uses a range of ports for the inbound connection, enter
the ending port number of the range.
9.
Click the
Apply
button.
The service or application is added to the Port Triggering Portmap Table. The
Enable
check box is selected automatically.
10.
In the Port Triggering section, select how the cable data gateway applies port triggering:
•
Per Schedule
. Port triggering is enabled according the schedule that you must select
from the menu.
For more information, see
Schedule When Features Are Active
on page
68.
•
Always
. Port triggering is always enabled.
Note:
By default, the
Never
radio button is selected and port triggering is
disabled, even if you specified services and applications in the table.
11.
Click the
Apply
button.
Your settings are saved.

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