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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 enable service blocking:

1.

Select either Per Schedule or Always

2.

Click

Apply

.

3.

If you want to block by schedule, be sure to specify a time period in the Schedule menu, as

described in

“Scheduling When Blocking Will Be Enforced” on page 3-6

.

To specify a service for blocking:

1.

Click

Add

. The Add Services menu will appear, as shown below:

2.

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.

Figure 3-3

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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 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. This information can usually be determined by contacting the publisher of the

application or from user groups of newsgroups.

1.

Enter the Starting Port and Ending Port numbers. If the application uses a single port number,

enter that number in both boxes.

2.

If you know that the application uses either TCP or UDP, select the appropriate protocol. If

you are not sure, select Both.

Configuring Service Blocking by IP Address Range

Under “Filter Services For”, you can block the specified service for a single computer, a range of

computers (having consecutive IP addresses), or all computers on your network.

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Scheduling When Blocking Will Be Enforced

The RangeMax NEXT Wireless Router allows you to specify when blocking will be enforced. The

Schedule menu is shown below:

Use this schedule for blocking content. Check this box if you wish to enable a schedule for

Content Filtering.

•

Days to Block. Select days to block by checking the appropriate boxes. Select “Every day” to

check the boxes for all days.

•

Time of Day to Block. Select a start and end time in 23:59 format. Select “All Day” for 24

hour blocking.

•

Click

Apply

to make the schedule take effect.

Be sure to select your Time Zone in the E-Mail menu; see

“Configuring E-Mail Alert and Web

Access Log Notifications” on page 3-9

for details.

Figure 3-4

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Viewing Logs of Web Access or Attempted Web Access

The log is a detailed record of what Web sites you have accessed or attempted to access. Up to 128

entries are stored in the log. Log entries will only appear when keyword blocking is enabled, and

no log entries will be made for the Trusted User. An example is shown below:

Log entries are described in

Table 3-1

.

Figure 3-5

Table 3-1. Log entry descriptions

Field

Description

Date and Time

The date and time the log entry was recorded.

Source IP

The IP address of the initiating device for this log entry.

Action

This field displays whether the access was blocked or allowed.

Target URL

The name or IP address of the Web site or newsgroup visited or

attempted to access.

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Log action buttons are described in

Table 3-2

.

Table 3-2. Log action buttons

Field

Description

Refresh

Click this button to refresh the log screen.

Clear Log

Click this button to clear the log entries.

Send Log

Click this button to E-mail the log immediately.