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.

Wireless-G Router WGR614v9 Reference Manual

3-2

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

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

Wireless-G Router WGR614v9 Reference Manual

3-4

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

Wireless-G Router WGR614v9 Reference Manual

Restricting Access From Your Network

3-5

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