1455 ESL License Manager - User Port

1455 is a User Port. Transport Protocol TCP UDP , 1455 Service Name esl-lm, Service Name Description: ESL License Manager.

Port	Protocol	Service Name	Description	Source
1455	TCP UDP	esl-lm	ESL License Manager	IANA
1455	TCP UDP	esl-lm	ESL License Manager	bekkoame

Port	Service Name	Description
1098	rmiactivation	RMI Activation
1121	rmpp	Datalode RMPP
1291	seagulllms	SEAGULLLMS
1645	sightline	SightLine
2412	cdn	CDN
2932	incp	INCP
3682	cas-mapi	EMC SmartPackets-MAPI
5092		Reserved
5833		Unassigned
8535		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