3
CompressNET
Low RiskTCP/UDP — System & Infrastructure
Port Overview
Port Number
3
Service Name
CompressNET
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 3?
Originally assigned to the CompressNET Management Utility and Compression Process. Port 3 is effectively unused in modern networks and is marked reserved by IANA.
TCP/UDP
System & Infrastructure
Security Considerations
Port 3 (CompressNET) is classified as low risk. This service uses encryption or has a minimal attack surface, making it relatively safe to expose.
Recommendation: Standard security practices apply. Keep software updated and monitor access.