Block Services (Port Filtering) - NETGEAR R7000 User Manual

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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 identifies the requested
service. This number displays 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 Internet Engineering Task Force (IETF at http://www.ietf.org/) defines many common
protocols, which are published 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.
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:
Select Advanced > Security > Block Services.
1.
Select either Per Schedule or Always.
2.
If you selected Per Schedule, specify a time period in the Schedule screen.
3.
Click Add to add a service.
4.
R7000 Smart WiFi Router
Security
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