Owner's Manual

Security
70
R6250 Smart WiFi Router
2. Select one of the keyword blocking options:
• Per Schedule. Turn on keyword blocking according to the Schedule screen settings.
• Always. Turn on keyword blocking all the time, independent of the Schedule screen.
3. In the Keyword field, enter a keyword or domain, click Add Keyword, and click Apply.
The Keyword list supports up to 32 entries. Here are some sample entries:
• Specify XXX to block http://www.badstuff.com/xxx.html.
• Specify .com if you want to allow only sites with domain suffixes such as .edu or .gov.
• Enter a period (.) to block all Internet browsing access.
 To delete a keyword or domain:
1. Select the keyword you want to delete from the list.
2. Click Delete Keyword.
3. Click Apply.
Your changes are saved.
 To specify a trusted computer:
You can exempt one trusted computer from blocking and logging. The computer you exempt
has to have a fixed IP address.
1. In the Trusted IP Address field, enter the IP address.
2. Click Apply.
Your changes are saved.
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, a service or port number identifiefs the requested
service. This number is 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 Internet Engineering Task Force (IETF at http://www.ietf.org/) has defined and published
the service numbers for many common protocols in RFC1700, “Assigned Numbers.” Service
numbers for other applications are typically chosen from the range 1024 - 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.