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information by contacting the publisher of the application, by asking user groups or

newsgroups, or by searching.

You can add and block specific Internet services by computers on your network. This feature

is called service blocking or port filtering. To add a service for blocking, first find out which

port number or range of numbers the application uses.



To block services:

1.

Select

ADVANCED > Security > Block Services

.

A screen similar to the following displays:

2.

Select one of the service blocking options (by default, Never is selected):

•

Per Schedule

. Turn on service blocking according to the settings on the Schedule

screen (see

Schedule Blocking

on page

68).

•

Always

. Turn on service blocking all the time, independent of the settings on the

Schedule screen.

3.

To add a service, click the

Add

button.

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A screen similar to the following displays:

4.

From the Service Type list, select the application or service to block.

The list already displays several common services, but you are not limited to these

choices.

5.

To add any additional services or applications that do not already display, select

User

Defined

.

6.

If you selected User Defined in the previous step:

a.

If you know the protocol that the application uses, select

TCP

or

UDP

. If you are not

sure, select

TCP/UDP

.

b.

Enter the starting and ending port numbers.

If the application uses a single port number, enter that number in both fields.

c.

Type a descriptive name in the Service Type/User Defined field.

7.

Select the radio button for the IP address configuration that you want to block, and enter the

IP addresses.

You can block the specified service for a single computer, a range of computers with

consecutive IP addresses, or all computers on your network.

8.

Click the

Add

button.

The application or service is saved in the Service Table on the Block Services screen.



To edit or delete an application or service from the Service Table:

1.

Select

ADVANCED > Security > Block Services

.

The Block Services screen displays.

2.

In the Service Table, select the radio button next to the application or service that you want

to edit or delete.

3.

To edit the application or service, click the

Edit

button.

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N450 Wireless Router WNR2500

a.

Edit the application or service as described in the previous procedure.

b.

Click the

Accept

button.

4.

To delete the application or service, click the

Delete

button.

The application or service is removed from the table.

Schedule Blocking

If you have set up keyword blocking, service blocking, or both, you can specify the days and

time that you want blocking to occur.



To schedule blocking:

1.

Select

ADVANCED > Security > Schedule

.

A screen similar to the following displays:

2.

Set up the schedule for blocking keywords and services.

•

Days to Block

. Select days on which you want to apply blocking by selecting one or

more individual check boxes, or select

Every Day

to select the check boxes for all

days.

•

Time of Day to Block

. Select a start and end time in 24-hour format, or select

All

Day

for 24-hour blocking.

3.

Select your time zone from the list.

4.

If your time zone uses daylight saving time, select the

Automatically adjust for daylight

savings time

check box.

5.

Click the

Apply

button.

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Security Event Email Notifications

To receive logs and alerts by email, provide your email information in the E-mail screen, and

specify which alerts you want to receive and how often.



To set up email notifications:

1.

Select

ADVANCED > Security >

E-mail

.

A screen similar to the following displays:

2.

To receive email logs and alerts from the router, select the

Turn Email Notification On

check box.

3.

In the Your Outgoing Mail Server field, enter the name of your ISP outgoing (SMTP) mail

server (such as mail.myISP.com).

You might be able to find this information in the configuration screen of your email

program. When you leave this field blank, the router does not send log and alert

messages.

4.

Enter the email address to which logs and alerts are sent in the Send to This E-mail Address

field.

This email address is also used as the sender’s email address. When you leave this field

blank, the router does not send log and alert messages.

5.

If your outgoing email server requires authentication, select the

My Mail Server requires

authentication

check box. Enter the user name and password for the outgoing email

server.

6.

To have email alerts sent immediately when someone attempts to visit a blocked site or

service, select the

Send Alert Immediately

check box.

7.

Specify when the logs are sent.

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If you select the Weekly, Daily, or Hourly option and the log fills up before the specified

period, the log is automatically emailed to the specified email address. You can also

select the log that is sent when the log is full.

Note:

Whatever option you select, after the log is sent, the log is cleared from

the router’s memory. If the router cannot email the log file, the log buffer might

fill up. In this case, the router overwrites the log and discards its contents.

8.

Click the

Apply

button.