N300 Wireless Router WNR2000v4
The service numbers for many common protocols are defined by the Internet Engineering Task Force (IETF at http://www.ietf.org/) 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 is used by the application.
To block services:
1.Select Advanced > Security > Block Services. The Block Services screen 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 67).
•Always. Turn on service blocking all the time, independent of the settings on the Schedule screen.
3.Click the Add button to add a service.
Security
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