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Page 46 / 99 Scroll up to view Page 41 - 45
Security
46
N150 2-Port Wireless Router WNR612v3
Block Services (Port Filtering)
Services are functions that server computers perform 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 the Internet sends a
request for service to a server computer, 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 the destination port number 80 is an HTTP
(web server) request.
The service numbers for many common protocols are defined by the Internet Engineering
Task Force (IETF at
) 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. Although the router already holds a list of many service port
numbers, you are not limited to these choices. You can often determine port number
information by contacting the publisher of the application, by asking user groups or
newsgroups, or by searching.
The Block Services screen lets you add and block specific Internet services by computers on
your network. This is called service blocking or port filtering. To add a service for blocking,
first determine which port number or range of numbers the application uses.
To block services:
1.
Select
Advanced > Security > Block Services
to display the following screen:
2.
Select either
Per Schedule
or
Always
to enable service blocking, and click
Apply
. If you
selected Per Schedule, specify a time period in the Schedule screen as described in
Schedule Blocking
on page
48.
Page 47 / 99
Security
47
N150 2-Port Wireless Router WNR612v3
3.
Click
Add
to add a service. The Block Services Setup screen displays:
4.
From the Service Type list, select the application or service to allow or block. 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.
If you know that the application uses either TCP or UDP, select the appropriate protocol. If
you are not sure, select
Both
.
6.
Enter the starting and ending port numbers. If the application uses a single port number,
enter that number in both fields.
7.
Select the radio button for the IP address configuration 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
Add
to enable your Block Services Setup selections.
Page 48 / 99
Security
48
N150 2-Port Wireless Router WNR612v3
Schedule Blocking
You can specify the days and time that you want to block Internet access.
To schedule blocking:
1.
Select
Advanced > Security > Schedule
to display the following screen:
2.
Set up the schedule for blocking keywords and services.
•
Days to Block
. Select days on which you want to apply blocking by selecting the
appropriate 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. If you use daylight savings time, select the
Automatically adjust for daylight savings time
check box.
4.
Click
Apply
to save your settings.
Page 49 / 99
Security
49
N150 2-Port Wireless Router WNR612v3
Security Event Email Notifications
To receive logs and alerts by email, provide your email information in the Email screen, and
specify which alerts you want to receive and how often.
To set up email notifications:
1.
Select
Advanced > Security >
Email
to display the following screen:
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’s 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. If you leave this field blank, log and alert
messages are not sent by email.
4.
Enter the email address to which logs and alerts are sent in the Send to This Email Address
field. This email address is also used for the From address. If you leave this field blank, log
and alert messages are not sent by email.
5.
If your outgoing email server requires authentication, select the
My Mail Server requires
authentication
check box. Fill in the User Name and Password fields for the outgoing email
server.
6.
You can have email alerts sent immediately when someone attempts to visit a blocked site,
and you can specify that logs are sent automatically.
If you select the Weekly, Daily, or Hourly option and the log fills up before the specified
period, the log is emailed to the specified email address. 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.
7.
Click
Apply
to save your settings.
Page 50 / 99
50
6
6.
Administration
Managing your network
This chapter describes the router settings for administering and maintaining your router and
home network. See
Remote Management
on page
76 for information about checking the status
of your router over the Internet, and
Traffic Meter
on page
78 for information about monitoring
Internet traffic on your router’s Internet port.
This chapter includes the following sections:
•
Upgrade the Firmware
•
View Router Status
•
View Logs of Web Access or Attempted Web Access
•
Manage the Configuration File
•
Set Password

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