72
NETRJS-2
Low RiskTCP/UDP — System & Infrastructure
Port Overview
Port Number
72
Service Name
NETRJS-2
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 72?
NETRJS-2 is the second of four ports (71-74) assigned to the ARPANET Remote Job Entry service for submitting batch workloads to remote mainframes. Defined in RFC 740 and used in the early ARPANET environment of the 1970s. It is completely obsolete.
TCP/UDP
System & Infrastructure
Security Considerations
Port 72 (NETRJS-2) 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.