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61
N450 Wireless Router WNR2500
To remove the device from the table, click the
Delete
button.
To edit the MAC address, device name, or priority, click the
Edit
button.
Edit the information you want to change.
Note:
You cannot delete or edit a device that is detected and automatically
added to the MAC Device List.
6.
Click the
Apply
button.
The device information is saved or removed from the MAC Device List.
Bandwidth Control
Bandwidth control lets you set a limit to the bandwidth that is available for traffic from the
router to the Internet.
To set the maximum uplink bandwidth:
1.
Select
ADVANCED > Setup > QoS Setup
.
A screen similar to the following displays:
2.
Select the
Turn Bandwidth Control On
check box.
3.
Select the
Automatically check Internet Uplink bandwidth
radio button.
4.
Click the
Check
button.
The router detects the available uplink bandwidth. After about one minute, the available
bandwidth displays onscreen. This information can help you to determine the maximum
bandwidth setting that you want to allow.
5.
Select the
Uplink bandwidth
radio button.
6.
Enter the maximum bandwidth that you want to allow, and select either
Kbps
or
Mbps
.
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N450 Wireless Router WNR2500
7.
Click the
Apply
button.
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63
5
5.
Security
Keep unwanted content out of your network
This chapter explains how to use the basic firewall features of the router to prevent objectionable
content from reaching the computers and other devices connected to your network.
This chapter includes the following sections:
Keyword Blocking of HTTP Traffic
Port Filtering to Block Services
Schedule Blocking
Security Event Email Notifications
For information about parental controls, see
Parental Controls
on page
38.
For information about access control, see
Set Up Access Control
on page
35.
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Security
64
N450 Wireless Router WNR2500
Keyword Blocking of HTTP Traffic
Use keyword blocking to prevent certain types of HTTP traffic from accessing your network.
The blocking can be always or according to a schedule.
To set up keyword blocking:
1.
Select
ADVANCED > Security >
Block Sites
.
A screen similar to the following displays:
2.
Select one of the keyword blocking options (by default, Never is selected):
Per Schedule
. Turn on keyword blocking according to the settings on the Schedule
screen (see
Schedule Blocking
on page
68).
Always
. Turn on keyword blocking all the time, independent of the settings on the
Schedule screen.
3.
In the Type keyword or domain name here field, enter a keyword or domain, and click the
Add Keyword
button.
To add more keywords or domains, repeat this step.
The Keyword list supports up to 32 entries. Here are some sample entries:
If you specify the keyword xxx, the URL www.zzyyqq.com/xxx.html is blocked, as is
the newsgroup alt.pictures.xxx.
If you specify the keyword .com, only websites with other domain suffixes (such
as
.edu or
.gov) can be viewed.
If you specify a period (
.
) as the keyword, all Internet browsing access is blocked.
4.
Click the
Apply
button.
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Security
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N450 Wireless Router WNR2500
To delete a keyword or domain:
1.
Select
ADVANCED > Security >
Block Sites
.
The Block Sites screen displays.
2.
Select the keyword or domain that you want to delete from the list.
3.
Click the
Delete Keyword
button.
To delete all keywords and domains from the list, click the
Clear List
button.
4.
Click the
Apply
button.
Note:
If you have set up email notifications (see
Security Event Email
Notifications
on page
69), you can be notified when someone
attempts to access a blocked site.
You can exempt one trusted computer from blocking and logging. The computer you exempt
needs to have a fixed IP address.
To specify a trusted computer:
1.
Select
ADVANCED > Security >
Block Sites
.
The Block Sites screen displays.
2.
Select the
Allow trusted IP address to visit blocked sites
check box.
3.
In the Trusted IP Address field, type the last octet of the IP address.
The first three octets of the IP address depend on the IP address that is assigned to the
router on the LAN Setup screen.
4.
Click the
Apply
button.
Port Filtering to Block Services
Services are functions performed by server computers at the request of client computers. For
example, web servers serve web pages, time servers serve time and date information, and
game hosts serve data about other players’ moves. When a computer on the Internet sends
a request for service to a server computer, the service or port number identifies the requested
service. This number appears as the destination port number in the transmitted IP packets.
For example, a packet that is sent with the destination port number 80 is an HTTP (web
server) request.
The Internet Engineering Task Force (IETF at
) identifies the service
numbers for many common protocols. These numbers are published in RFC1700, “Assigned
Numbers.” Typically, authors of other applications choose service numbers for the
applications from the range 1024–65535. Although the router already holds a list of many
service port numbers, you are not limited to these choices. You can often find port number

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