Block Services (Port Filtering) - NETGEAR CG3300CMR User Manual

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To specify a trusted computer:
You can exempt one trusted computer from blocking and logging. The computer that you
exempt has to have a fixed IP address.
Select Allow trusted IP address to visit blocked sites.
1.
In the Trusted IP Address field, enter the IP address.
2.
Click Apply to save your changes.
3.

Block Services (Port Filtering)

Server computers perform services 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 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 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 gateway 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 capability 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.
Wireless Cable Gateway CG3300CMR
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