Services - NETGEAR Wireless-N 150 User Manual

Figure 3-7
The Move button allows you to relocate a defined rule to a new position in the table.
To easily open or close AOL or MSN Instant Messenger ports:
1. Under Instant Messaging (IM) Ports, select a radio button:
• Close IM Ports. Specifies to disable instant messaging traffic.
• Open IM Ports. Specifies to enable instant messaging traffic. IM ports are open by
default.
2. Click Apply to save your changes.

Services

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 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) and published in RFC1700, "Assigned Numbers." Service numbers for other
Protecting Your Network
Wireless-N 150 ADSL2+ Modem Router DGN1000 User Manual
v1.1, January 2010
3-10