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Port 221

Port
Protocol
Service Name
Description
Source
221
TCP UDP
fln-spx
Berkeley rlogind with SPX auth
IANA
221
 
Snape
simovits.com
221
TCP UDP
fln-spx
Berkeley rlogind with SPX auth
bekkoame

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A port is an application-specific or process-specific software construct serving as a communications endpoint in a computer's host operating system.

Service names and port numbers are used to distinguish between different services that run over transport protocols such as TCP, UDP, DCCP, and SCTP.

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);