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DSL-6740U
VDSL/Ethernet Router with Wi-Fi
and Built-in Switch
User Manual
Configuring via Web-based Interface
Parameter
Description
Private IP
The IP address of the server from the local area network. To choose
a device connected to the router's LAN at the moment, select the
relevant value from the drop-down list (the field will be filled in
automatically).
Remote IP
The IP address of the server from the external network.
Click the
Save
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
Save
button.
To remove an existing server, select the relevant server in the table. On the opened page, click the
Delete
button.
To remove all servers from this page, click the
Clear all
button (the button is displayed if at least
one server exists).
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Page 132 / 158
DSL-6740U
VDSL/Ethernet Router with Wi-Fi
and Built-in Switch
User Manual
Configuring via Web-based Interface
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 97. 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.
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.
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Page 133 / 158
DSL-6740U
VDSL/Ethernet Router with Wi-Fi
and Built-in Switch
User Manual
Configuring via Web-based Interface
Application Rules
On the
Firewall / Application rules
page, you can define rules for the Port Triggering function.
Figure 98. The
Firewall / Application rules
page.
To add a new rule for the Port Triggering function, click the
Add
button. In the line displayed, you
can specify the following parameters:
Parameter
Description
Rules name
A name for the rule for easier identification.
Interface
A WAN connection to which this rule will be assigned.
Port range
Incoming
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.
Outgoing
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.
Protocol
Incoming
A protocol to which this rule will be applied upon receiving data to
the specified port range.
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Page 134 / 158
DSL-6740U
VDSL/Ethernet Router with Wi-Fi
and Built-in Switch
User Manual
Configuring via Web-based Interface
Parameter
Description
Outgoing
A protocol to which this rule will be applied upon transferring data
from the specified port range.
After specifying the needed parameters, click the
Save
button.
To edit an existing rule for the Port Triggering function, select a needed field in the relevant line of
the table, change its value, and click the
Save
button.
To remove an existing rule for the Port Triggering function, select the checkbox located to the left
of the relevant line in the table and click the
Save
button.
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Page 135 / 158
DSL-6740U
VDSL/Ethernet Router with Wi-Fi
and Built-in Switch
User Manual
Configuring via Web-based Interface
MAC Filter
The MAC-address-based filtering allows blocking traffic subject to the source and destination MAC
addresses.
!
MAC-address-based filtering is active only when the device is configured as a transparent
bridge (the Bridge mode).
Figure 99. The
Firewall / MAC filter
page.
To create a new rule for filtering, click the
Add
button. In the line displayed, you can specify the
following parameters:
Parameter
Description
Source MAC address
The MAC address of the source host. To choose a device
connected to the router's LAN at the moment, select the relevant
value from the
Known IP/MAC
addresses
drop-down list (the
field will be filled in automatically).
Destination MAC address
The MAC address of the destination host.
Direction
Select a direction for which the rule will be applied.
Protocol
Select a protocol for which the rule will be applied. The
<Any>
value means any protocol from those displayed in the list.
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