:221
(TCP/UDP)
Medium Risk
FLN-SPX
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TCP/UDP — Remote Access
Port Overview
Port Number
221
Service Name
FLN-SPX
Transport Protocol
TCP/UDP
Category
Remote Access
Security Risk
Medium
Port Range
Well-Known (0-1023)
What is Port 221?
Berkeley rlogind with SPX authentication. An enhanced version of rlogin using Sequenced Packet Exchange for authentication.
TCP/UDP
Remote Access
Security Considerations
Port 221 (FLN-SPX) is classified as medium risk. While this service is commonly exposed, consider using encrypted alternatives where available.
Recommendation: Keep the service updated. Monitor logs for unusual activity.