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Page 41 / 116 Scroll up to view Page 36 - 40
3-1
v1.1, May 2008
Chapter 3
Restricting Access From Your Network
This chapter describes how to use the content filtering and reporting features of the Wireless-G
Router Model WGR614v9 to protect your network. You can find these features by selecting the
items under Content Filtering in the main menu of the browser interface.
This chapter includes the following sections:
•
“Content Filtering Overview
”
•
“Blocking Access to Internet Sites
”
•
“Blocking Access to Internet Services” on page 3-3
•
“Scheduling Blocking” on page 3-5
•
“Viewing Logs of Web Access or Attempted Web Access” on page 3-7
Content Filtering Overview
The Wireless-G Router Model WGR614v9 provides you with Web content filtering options, plus
browser activity reporting and instant alerts through e-mail. Parents and network administrators
can establish restricted access policies based on time of day, Web addresses, and Web address
keywords. You can also block Internet access by applications and services, such as chat rooms or
games.
To configure these features of your router, select the items under Content Filtering
in the main
menu of the browser interface. This chapter describes the screens that display.
Blocking Access to Internet Sites
The Wireless-G 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.
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Wireless-G Router WGR614v9 Reference Manual
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Restricting Access From Your Network
v1.1, May 2008
•
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
Block Sites
under Content Filtering in the main menu. The Block Sites screen displays.
2.
Enable keyword blocking by selecting either
Per Schedule
or
Always
.
To block by schedule, be sure to specify a time period in the Schedule screen. For information
about scheduling, see
“Scheduling Blocking” on page 3-5
.
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 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
.
Figure 3-1
Page 43 / 116
Wireless-G Router WGR614v9 Reference Manual
Restricting Access From Your Network
3-3
v1.1, May 2008
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.
Blocking Access to Internet Services
The Wireless-G Router allows you to block the use of certain Internet services by computers on
your network. This is called service blocking or port filtering. 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 your network sends a request for service to a server computer on the
Internet, the requested service is identified by a service or port number. This number appears as the
destination port number in the transmitted IP packets. For example, a packet that is sent with
destination port number 80 is an HTTP (Web server) request.
To block access to Internet services:
1.
Select
Block Services
under Content Filtering in the main menu. The Block Services screen
displays.
2.
Enable service blocking by selecting either
Per Schedule
or
Always
, and then click
Apply
.
Figure 3-2
Page 44 / 116
Wireless-G Router WGR614v9 Reference Manual
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Restricting Access From Your Network
v1.1, May 2008
To block by schedule, be sure to specify a time period in the Schedule screen. For information
about scheduling, see
“Scheduling Blocking” on page 3-5
.
3.
Specify a service for blocking by clicking
Add
. The Block Services Setup screen displays.
4.
From the
Service Type
list, select the application or service to be allowed or blocked. The list
already displays several common services, but you are not limited to these choices. To add any
additional services or applications that do not already appear, select
User Defined
.
5.
Select the radio button for the IP address configuration you want to block, and then enter the
IP addresses in the appropriate fields.
6.
Click
Add
to enable your Block Services Setup selections.
Configuring a User-Defined Service
To define a service, first you must determine which port number or range of numbers is used by
the application. The service port numbers for many common protocols are defined by the Internet
Engineering Task Force (IETF) and published in RFC1700, “Assigned Numbers.” Service
numbers for other applications are typically chosen from the range 1024 to 65535 by the authors of
the application. You can often determine port number information by contacting the publisher of
the application, by asking user groups or newsgroups, or by searching.
•
Enter the starting port and ending port numbers. If the application uses a single port number,
enter that number in both fields.
Figure 3-3
Page 45 / 116
Wireless-G Router WGR614v9 Reference Manual
Restricting Access From Your Network
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v1.1, May 2008
•
If you know that the application uses either TCP or UDP, select the appropriate protocol. If
you are not sure, select
Both
.
Blocking Services by IP Address Range
In the Filter Services For area, you can block the specified service for a single computer, a range of
computers (having consecutive IP addresses), or all computers on your network.
Scheduling Blocking
The Wireless-G Router allows you to specify when blocking is enforced.
To schedule blocking:
1.
Select
Schedule
under Content Filtering in the main menu. The Schedule screen displays.
2.
Configure the schedule for blocking keywords and services.
a.
Days to Block
. Select days on which you want to apply blocking by selecting the
appropriate check boxes. Select
Every Day
to select the check boxes for all days. Click
Apply
.
Figure 3-4

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