556
Remotefs
Medium RiskTCP — File Transfer
Port Overview
Port Number
556
Service Name
Remotefs
Transport Protocol
TCP
Category
File Transfer
Security Risk
Medium
Port Range
Well-Known (0-1023)
What is Port 556?
Port 556 is assigned to Remotefs (rfs), an early Sun Microsystems alternative to NFS. Entirely replaced by NFS.
TCP
File Transfer
Security Considerations
Port 556 (Remotefs) 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.