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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Figure 40. The page for adding a virtual server.
You can specify the following parameters:
Parameter
Description
Template
Select a virtual server template from the drop-down list, or select
Custom
to specify all parameters of the new virtual server
manually.
Name
A name for the virtual server for easier identification. You can
specify any name.
Interface
A WAN connection to which this virtual server will be assigned.
Protocol
A protocol that will be used by the new virtual server. Select a value
from the drop-down list.
Public port (begin)/
Public port (end)
A port of the router from which traffic is directed to the IP address
specified in the
Private IP
field. Specify the start and the end value
for the port range. If you need to specify one port, enter the needed
value in the
Public port (begin)
field and leave the
Public port
(end)
field blank.
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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Parameter
Description
Private port (begin)/
Private port (end)
A port of the IP address specified in the
Private IP
field to which
traffic is directed from the
Public port
. Specify the start and the
end value for the port range. If you need to specify one port, enter
the needed value in the
Private port (begin)
field and leave the
Private port (end)
field blank.
Private IP
The IP address of the server from the local area network.
Click the
Change
button.
To edit the parameters of an existing server, select the relevant server in the table. On the opened
page, change the needed parameters and click the
Change
button.
To remove an existing server, select the relevant server in the table. On the opened page, click the
Delete
button.
DMZ
A DMZ is a host or network segment located “between” internal (local) and external (global)
networks. In the router, the DMZ implements the capability to transfer a request coming to a port of
the DSL router from the external network to a specified host of the internal network.
On the
Firewall / DMZ
page you can specify the IP address of the DMZ host.
Figure 41. The
Firewall / DMZ
page.
To enable the DMZ, select the
Enabled
checkbox, enter the IP address of a host from your
network in the
IP address
field, and click the
Change
button.
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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Note that when the DMZ is enabled, all traffic coming to a port of the WAN interface of the router
is directed to the same port of the specified IP address. Also note that virtual servers have higher
priority than the DMZ host. In other words, if there has been created a virtual server that directs
traffic from external port 80 to a port of the device from the router's local network, then entering
http://router_WAN_IP
in the address bar, users of the external network are directed to the
specified port and IP address configured for the virtual server, but not to port 80 of the device with
the IP address specified on the
Firewall / DMZ
page.
To disable the DMZ, deselect the
Enabled
checkbox and click the
Change
button.
Application Rules
On the
Firewall / Application rules
page, you can define rules for the Port Triggering function.
Figure 42. The
Firewall / Application rules
page.
To add a new rule for the Port Triggering function, click the
Add
button.
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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
Figure 43. The page for adding a rule for the Port Triggering function.
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DSL-2520U
ADSL2/2+ Router with USB and Ethernet Ports
User Manual
Configuring via Web-based Interface
You can specify the following parameters:
Parameter
Description
Application rule editing
Rules name
A name for the rule for easier identification.
Interface
A WAN connection to which this rule will be assigned.
Incoming port and protocol settings
Protocol
A protocol to which this rule will be applied upon receiving data to
the specified port or port range.
Starting port/
Ending port
A range of the router's ports which will be open to receive data from
the external network (incoming traffic). Specify the start and the end
value for the port range. If you need to specify one port, enter the
needed value in the
Starting port
field and leave the
Ending port
field blank.
Outgoing port and protocol settings
Protocol
A protocol to which this rule will be applied upon transferring data
from the specified port or port range.
Starting port/
Ending port
A range of the router's ports from which data are transferred to the
external network (outgoing traffic). Specify the start and the end
value for the port range. If you need to specify one port, enter the
needed value in the
Starting port
field and leave the
Ending port
field blank.
Click the
Change
button.
To edit an existing rule for the Port Triggering function, select the relevant rule in the table. On the
opened page, change the needed parameters and click the
Change
button.
To remove an existing rule for the Port Triggering function, select the relevant rule in the table. On
the opened page, click the
Delete
button.
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