279 Unassigned - System Port

279 is a System Port. Transport Protocol , 279 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
279			Unassigned	IANA
279	TCP UDP		Unassigned	bekkoame

Port	Service Name	Description
297		Unassigned
758	nlogin
1053	remote-as	Remote Assistant (RA)
1758	tftp-mcast	tftp-mcast
2038	objectmanager
2085	ada-cip	ADA Control
2338	norton-lambert	Norton Lambert
2998	realsecure	Real Secure
4202	vrml-multi-use	VRML Multi User Systems
4207	vrml-multi-use	VRML Multi User Systems

A port is an endpoint of communication in an operating system. While the term is also used for hardware devices, in software it is a logical construct that identifies a specific process or a type of service.

Port numbers are assigned in various ways, based on three ranges: System Ports (0-1023), User Ports (1024-49151), and the Dynamic and/or Private Ports (49152-65535);

The Well Known Ports are assigned by the IANA and on most systems can only be used by system (or root) processes or by programs executed by privileged users. Ports are used in the TCP [RFC793] to name the ends of logical connections which carry long term conversations. For the purpose of providing services to unknown callers, a service contact port is defined. This list specifies the port used by the server process as its contact port. The contact port is sometimes called the "well-known port". To the extent possible, these same port assignments are used with the UDP [RFC768]. The range for well-known ports managed by the IANA is 0-1023.
DYNAMIC AND/OR PRIVATE PORTS Registered Ports are those from 1024 through 49151.
The Dynamic and/or Private Ports are those from 49152 through 65535