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Chapter 3.
Security Settings
N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2 User Manual
2.
From the main menu, under
Advanced > Wireless Settings
, and then click
Setup Access
List
to display the Wireless Card Access List screen.
Figure 17.
The Wireless Station Access List screen displays a list of wireless PCs that are allowed to
connect to the N300 wireless modem router based on their MAC addresses. These
wireless PCs must also have the correct SSID and wireless security settings to access
the wireless network.
3.
Select the
Turn Access Control On
check box.
Figure 18.
Note:
If the
Turn Access Control On
check box is selected and the
Trusted Wireless Stations list is blank, then no wireless PCs will be
able to connect to your wireless network.
4.
You can select a wireless station from the Available Wireless Stations list, or you can enter
its MAC address manually:
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N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2 User Manual
-
If the wireless station is shown in the Available Wireless Stations list, click its radio
button to select it, and then click
Add
.
-
To manually specify the wireless station, in the Add New Station Manually section,
enter the name of the wireless station and its MAC address.The MAC address is 12
hexadecimal digits and can usually be found on the bottom of the wireless device.
Click
Add
.
The wireless station appears in the Trusted Wireless Stations list.
Note:
You can use the
Delete
button to remove access by a wireless
station.
5.
When you are finished, click
Apply
to save your changes. Now, only devices on the Trusted
Devices list will be allowed to wirelessly connect to the N300 wireless modem router.
Blocking Access to Internet Sites
The N300 wireless modem router allows you to restrict access based on Web addresses and
Web address keywords. Up to 255 entries are supported in the Keyword list.
Keyword application examples:
•
If the keyword XXX is specified, the URL www.zzzyyqq.com/xxx.html is blocked.
•
If the keyword .com is specified, only websites with other domain suffixes (such as .edu,
.org, or .gov) can be viewed.
To block access to Internet sites:
1.
Select
Security > Block Sites
in the main menu. The Block Sites screen displays.
Figure 19.
2.
Enable keyword blocking by selecting either
Per Schedule
or
Always
.
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Chapter 3.
Security Settings
N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2 User Manual
To block by schedule, be sure to specify a time period in the Schedule screen. For
information about scheduling, see
Scheduling Blocking
on page
45.
Block all access to Internet browsing during a scheduled period by entering a dot (
.
) as
the keyword, and then set a schedule in the Schedule screen.
3.
Add a keyword or domain by entering it in the keyword field and clicking
Add Keyword
. The
keyword or domain name then appears in the Block sites containing these keywords or
domain names list.
Delete a keyword or domain name by selecting it from the list and clicking
Delete
Keyword
.
4.
You can specify one trusted user, which is a computer that is exempt from blocking and
logging. Specify a trusted user by entering that computer’s IP address in the Trusted IP
Address fields.
Since the trusted user is identified by IP address, you should configure that computer with
a fixed IP address.
5.
Click
Apply
to save all your settings in the Block Sites screen.
Firewall Rules
You can use this screen to create firewall rules to block or allow specific traffic.
Note:
The firewall rules feature is for advanced administrators only!
Incorrect configuration will cause serious problems.
The Firewall Rules screen lists all existing rules for outbound traffic and inbound traffic. If you
have not defined any rules, only the default rules are listed. You can add or edit rules. You
can also use the
Move
and
Delete
buttons to move the selected rule to a new position in the
table, or to delete the selected rule.
From the main menu, select
Security > Firewall Rules
to display the following screen:
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N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2 User Manual
Figure 20.
•
Outbound Services
. This lists all existing rules for outbound traffic. If you have not
defined any rules, only the default rule is listed. The default rule allows all outgoing traffic.
•
Inbound Services
. This lists all existing rules for inbound traffic. If you have not defined
any rules, only the default rule is listed. The default rule blocks all inbound traffic.
•
Ports to enable MSN and AOL Instant Messaging are open by default. To close these
ports, select the
Close IM Ports
radio button, and then click
Apply
so that your changes
take effect. When these ports are closed, Instant Messaging does not function.
To add or edit a rule from the Firewall Rules screen:
1.
To edit a rule, select its radio button. To add a rule, click
Add
(it does not matter which
radio button is selected).
Depending on your selection, either the Outbound Services screen or Inbound Services
screen is displayed.
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Chapter 3.
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N300 Wireless Dual Band ADSL2+ Modem Router DGND3300v2 User Manual
Figure 21.
2.
From the
Service
list, select the service that you want to add or edit.
3.
Enter the settings to specify the service as explained in the following table.
Field
Outbound Rules
Inbound Rules
Action
• For outbound rules, ALLOW rules are
useful only if the traffic is already covered
by a BLOCK rule (that is, you want to
allow a subset of traffic that is currently
blocked by another rule).
• To define the schedule used in these
selections, use the Schedule screen (see
Scheduling Blocking
on page
45).
• For inbound rules, BLOCK rules are
useful only if the traffic is already covered
by an ALLOW rule (that is, you want to
block a subset of traffic that is currently
allowed by another rule).
• To define the schedule used in these
selections, use the Schedule screen (see
Scheduling Blocking
on page
45).
LAN users
(outbound
services only)
These settings determine which computers
on your network are affected by this rule,
based on their source (LAN) IP address.
Select the option you want:
•
Any
. All local IP addresses are covered
by this rule.
•
Address range
. If this option is selected,
you must fill in the Start and Finish fields.
•
Single address
. Enter the required
address in the Start fields.
—
Send to LAN
Server (inbound
services only)
—
Enter the IP address of the PC or server on
your LAN that will receive the inbound traffic
covered by this rule.
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