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Reference Manual for the MR814 v3 Cable/DSL Wireless Router
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Blocking Access to Internet Sites
The MR814 v3 router allows you to restrict access based on web addresses and web address
keywords. Up to 255 entries are supported in the Keyword list. The Block Sites menu is shown in
Figure 5-1
below:
Figure 5-1:
Block Sites menu
To enable keyword blocking, select either “Per Schedule” or “Always”, then click Apply. If you
want to block by schedule, be sure that a time period is specified in the Schedule menu.
To add a keyword or domain, type it in the Keyword box, click Add Keyword, then click Apply.
To delete a keyword or domain, select it from the list, click Delete Keyword, then click Apply.
Keyword application examples:
If the keyword “XXX” is specified, the URL <http://www.badstuff.com/xxx.html> is blocked.
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If the keyword “.com” is specified, only Web sites with other domain suffixes (such as .edu or
.gov) can be viewed.
If you wish to block all Internet browsing access during a scheduled period, enter the keyword
“.” and set the schedule in the Schedule menu.
To specify a Trusted User, enter that PC’s IP address in the Trusted User box and click Apply.
You may specify one Trusted User, which is a PC that will be exempt from blocking and
logging. Since the Trusted User will be identified by an IP address, you should configure that
PC with a fixed IP address.
Blocking Access to Internet Services
The MR814 v3 router allows you to block the use of certain Internet services by PCs on your
network. This is called services blocking or port filtering. The Block Services menu is shown
below:
Figure 5-2:
Block Services menu
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, select either Per Schedule or Always, then click Apply. If you want to
block by schedule, be sure that a time period is specified in the Schedule menu.
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To specify a service for blocking, click Add. The Add Services menu will appear, as shown below:
Figure 5-3:
Add Services menu
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.
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.
Enter the Starting Port and Ending Port numbers. If the application uses a single port number, enter
that number in both boxes.
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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Configuring Services Blocking by IP Address Range
Under “Filter Services For”, you can block the specified service for a single PC, a range of PCs
(having consecutive IP addresses), or all PCs on your network.
Scheduling When Blocking Will Be Enforced
The MR814 v3 router allows you to specify when blocking will be enforced. The Schedule menu
is shown below:
Figure 5-4:
Schedule menu
Use this schedule for blocking content. Check this box if you wish to enable a schedule for
Content Filtering. Click Apply.
Days to Block. Select days to block by checking the appropriate boxes. Select Everyday to
check the boxes for all days. Click Apply.
Time of Day to Block. Select a start and end time in 23:59 format. Select All day for 24 hour
blocking. Click Apply.
Be sure to select your Time Zone in the E-Mail menu.
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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:
Figure 5-5:
Logs menu
Log entries are described in
Table 5-1
Table 5-1.
Log entry descriptions
Field
Description
Number
The index number of the content filter log entries. 128 entries
are available numbered from 0 to 127. The log will keep the
record of the latest 128 entries.
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.
The name or IP address of the website or newsgroup visited or
attempted to access.

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