Netgear N750-WiFi User Manual - Page 77

Firewall Rules, To create firewall rules, ADVANCED > Security > Firewall Rules.

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N750 Wireless Dual Band Gigabit ADSL Modem Router DGND4000 Firewall Rules 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 the Internet sends a request for service to a server computer, 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 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 1024-65535 by the authors of the application. Although the wireless modem 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 Firewall Rules screen lets you block or allow specific Internet traffic services by computers on your network. This process is called service blocking or port filtering. Note: This feature is for advanced administrators only. Incorrect configuration can cause serious problems.  To create firewall rules: 1. Select ADVANCED > Security > Firewall Rules. Security 77

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Security
77
N750 Wireless Dual Band Gigabit ADSL Modem Router DGND4000
Firewall Rules
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 the Internet sends
a request for service to a server computer, 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 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
) and 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 wireless modem 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 Firewall Rules screen lets you block or allow specific Internet traffic services by
computers on your network. This process is called service blocking or port filtering.
Note:
This feature is for advanced administrators only. Incorrect
configuration can cause serious problems.
To create firewall rules:
1.
Select
ADVANCED > Security > Firewall Rules.