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D840R ADSL2+ Router User Guide
5.2.3 NAT
5.2.3.1. Virtual Server
1)
Click “NAT”
→
“Virtual
Server” to display the
window shown in the
right figure. Here, you
can add or delete your
virtual server settings.
By default, the external
networks cannot access
the IP address of your
internal network.
However, if you need
such access by the
external networks (for
example, you need to
set up the server or
support some special
applications), you
should enable this
function to allow the
access by external
networks.
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D840R ADSL2+ Router User Guide
2)
Click “Add” to display
the
window shown in
the right figure.
a.
Select a Service:
Selecting the service to
be enabled.
b.
Custom Server:
Manually entering the
server name.
c.
Server IP Address: LAN
IP address for the
server.
Caution: After a service is
selected, the system
automatically opens
the corresponding
port. After you
manually enter a
customized service,
you need to manually
enter the port to be
opened.
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D840R ADSL2+ Router User Guide
d. Click “Save/Apply” to
display the service
added, as shown in the
right figure.
5.2.3.2 Port Triggering
1)
Click “Port Triggering” to
display the window
shown in the right figure.
Here, you can add or
delete your port
triggering service
settings.
For some special
applications, you need to
enable some application
ports. Through the port
triggering, you can enable
the automatic opening of
the ports required by
applications.
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D840R ADSL2+ Router User Guide
2)
Click “Add” to display the
window shown in the
right figure.
a.
Select an application:
Selecting the name of
the service to be
enabled.
b.
Custom application:
Manually entering the
service name.
Caution: After a service is
selected, the system
automatically sets the
corresponding port. After
you manually enter a
customized service, you
need to manually enter
the port to be triggered.
3)
Click “Save/Apply” to
display the service added,
as shown in the right
figure.
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D840R ADSL2+ Router User Guide
5.2.3.3 DMZ Host
1.
Click “DMZ Host” to
display the window
shown in the right
figure.
2.
DMZ Host IP Address:
Entering the LAN IP
address for the DMZ
host.
Caution: Opening DMZ
means to open all
ports. In this case,
your computer is
totally exposed to the
public network. Be
cautions to use this
function. Click
“Save/Apply” to
activate the settings.
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