N600 Wireless Dual Band Router WNDR3400 User Manual

Protecting Your Network

3-7

v1.0, August 2010

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.

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

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

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.

•

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

you are not sure, select

Both

.

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Scheduling Blocking

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

.

b.

Time of Day to Block

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

All Day

for

24-hour blocking. Click

Apply

.

Be sure to select your time zone in the E-mail screen as described in

“Setting the Time” on

page 3-11

.

3.

Click

Apply

to save your settings.

Viewing Logs of Web Access or Attempted Web Access

The log is a detailed record of the websites you have accessed or attempted to access. Up to

256 entries are stored in the log. Log entries appear only when keyword blocking is enabled and no

log entries are made for the trusted user.

Figure 3-6

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Select

Logs

under Content Filtering in the main menu. The Logs screen displays.

To refresh the log screen, click the

Refresh

button.

To clear the log entries, click the

Clear Log

button.

To e-mail the log immediately, click the

Send Log

button.

Configuring E-mail Alert and Web Access Log Notifications

To receive logs and alerts by e-mail, you must provide your e-mail account information.

To configure e-mail alert and web access log notifications:

Figure 3-7

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.

Target address

The name or IP address of the website or newsgroup

visited or to which access was attempted.

Action

Whether the access was blocked or allowed.

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1.

Select

E-mail

under Content Filtering in the main menu. The E-mail screen displays.

2.

To receive e-mail logs and alerts from the router, select the

Turn E-mail Notification On

check box.

a.

Enter the name of your ISP’s outgoing (SMTP) mail server (such as

mail.myISP.com

) in

the

Your Outgoing Mail Server

field. You might be able to find this information in the

configuration screen of your e-mail program. If you leave this field blank, log and alert

messages will not be sent by e-mail.

b.

Enter the e-mail address to which logs and alerts are sent in the

Send To This E-mail

Address

field. This e-mail address will also be used as the From address. If you leave this

field blank, log and alert messages will not be sent by e-mail.

3.

If your outgoing e-mail server requires authentication, select the

My Mail Server requires

authentication

check box.

a.

Enter your user name for the outgoing e-mail server in the

User Name

field.

b.

Enter your password for the outgoing e-mail server in the

Password

field.

4.

You can specify that logs are automatically sent by e-mail with these options:

•

Send alert immediately

. Select this check box for immediate notification of attempted

access to a blocked site or service.

Figure 3-8

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•

Send Logs According to this Schedule

. Specifies how often to send the logs: Hourly,

Daily, Weekly, or When Full.

–

Day

. Specifies which day of the week to send the log. Relevant when the log is sent

weekly or daily.

–

Time

. Specifies the time of day to send the log. Relevant when the log is sent daily or

weekly.

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

period, the log is automatically e-mailed to the specified e-mail address. After the log is sent,

the log is cleared from the router’s memory. If the router cannot e-mail the log file, the log

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

5.

Click

Apply

to save your settings.

So that the log entries are correctly time-stamped and sent at the correct time, be sure to set the

time as described in the next section.

Setting the Time

The WNDR3400 router uses the Network Time Protocol (NTP) to obtain the current time and date

from one of several network time servers on the Internet. To localize the time for your log entries,

you must specify your time zone:

•

Time Zone

. Select your local time zone. This setting is used for the blocking schedule and for

time-stamping log entries.

•

Automatically Adjust for Daylight Savings Time

. Select this check box if your region

supports daylight savings time. When this check box is set, the router will adjust the time by

adding one hour during the daylight savings time period. When daylight savings time ends, be

sure to un-check this check box.

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