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D6200 WiFi DSL Modem Router
To specify a trusted computer:
1. In the Trusted IP Address field, enter the IP address.
2. Click Apply.
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
T
ask Force (IETF at http://www.ietf.org/) and published in RFC1700, “Assigned Numbers.”
Service numbers for other applications are typically chose
n from the range 1024–65535 by
the authors of the application. Although the WiFi DSL 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.
Note: This feature is for advanced administrators only! Incorrect
configuration can cause serious problems.