4579 Unassigned - User Port

4579 is a User Port. Transport Protocol , 4579 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
4579			Unassigned	IANA

Port	Service Name	Description
1034	activesync	ActiveSync Notifications
1435	ibm-cics	IBM CICS
1559	web2host	web2host
1577	hypercube-lm	hypercube-lm
2842	l3-hawk	l3-hawk
3004	csoftragent	Csoft Agent
3110	sim-control	simulator control port
3855	opentrac	OpenTRAC
4213	vrml-multi-use	VRML Multi User Systems
4577		Unassigned

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