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48
Click
Apply
to save the settings.
The page shown in the following figure appears. A
virtual server is added.
4.3.3
Port Triggering
Some applications require that specific ports in the firewall of the device are open
for remote parties to gain access. Application rules dynamically open the firewall
ports when an application on the LAN initiates a TCP/UDP connection to a remote
party using the trigger ports. The device allows the remote party from the WAN side
to establish new connections back to the application on the LAN side using the
firewall ports. A maximum of 32 entries can be configured.
Choose
ADVANCED
>
Port Triggering
. The page shown in the following figure
appears.
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49
Click
Add
to add a new Port Trigger.
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Click the
Select an application
drop-down menu to choose the application you
want to setup for port triggering. When you have chosen an application the default
Trigger settings will populate the table below.
If the application you want to setup isn’t listed, click the
Custom application
radio
button and type in a name for the trigger in the Custom application field. Configure
the
Trigger Port Start
,
Trigger Port End
,
Trigger Protocol
,
Open Port Start
,
Open Port End
and
Open Protocol
settings for the port trigger you want to
configure.
When you have finished click the
Apply
button.
4.3.4
DMZ
Since some applications are not compatible with NAT, the device supports the use
of a DMZ IP address for a single host on the LAN. This IP address is not protected
by NAT and it is visible to agents on the Internet with the correct type of software.
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51
Note that any client PC in the DMZ is exposed to various types of security risks. If
you use the DMZ, take measures (such as client-based virus protection) to protect
the remaining client PCs on your LAN from possible contamination through DMZ.
Choose
ADVANCED
>
DMZ
. The page shown in the following figure appears.
Click
Apply
to save the settings.
4.3.5
Parental Control
Choose
ADVANCED
>
Parental Control
. The
Parent Control
page shown in the
following figure appears.
This page provides two useful tools for restricting Internet access.
Block Websites
allows you to quickly create a list of all websites that you wish to stop users from
accessing.
Block MAC Address
allows you to control when clients or PCs
connected to the device are allowed to access the Internet.
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52
4.3.5.1
Block Website
In the
Parent Control
page, click
Block Website
. The page shown in the following
figure appears.
Click
Add
. The page shown in the following page appears.
Enter the website in the
URL
field. Select the
Schedule
from the drop-down list, or
select
Manual Schedule
and select the corresponding time and days.
Click
Apply
to add the website to the
BLOCK WEBSITE
table. The page shown in
the following figure appears.

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