2377 Unassigned - User Port

2377 is a User Port. Transport Protocol , 2377 Service Name , Service Name Description: Unassigned.

Port	Protocol	Service Name	Description	Source
2377			Unassigned	IANA

Port	Service Name	Description
1506	utcd	Universal Time daemon (utcd)
1713	conferencetalk	ConferenceTalk
1895		unassigned
2115	kdm	Key Distribution Manager
2255	vrtp	VRTP - ViRtue Transfer Protocol
2569	sonuscallsig	Sonus Call Signal
3153	s8-client-port	S8Cargo Client Port
3969	landmarks	Landmark Messages
4532		Unassigned
4870	cc-tracking	Citcom Tracking Service

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