Configuring your network servers and services. Generic Network Configuration Information. Configuring your network servers and services. Network servers and services are programs that allow a remote user to make use of your Linux machine. Server programs listen on network ports.
Network ports are a means of addressing a particular service on any particular host.
They are how a server knows the difference between an incoming telnet connection and an incoming ftp connection. The remote user establishes a network connection to your machine. There are two ways that network daemons may operate. Both are commonly employed in practice. The network daemon program listens on the designated network port.