:399
(TCP/UDP)
Low Risk
ISO-TSAP-C2
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TCP/UDP — System & Infrastructure
Port Overview
Port Number
399
Service Name
ISO-TSAP-C2
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 399?
ISO Transport Class 2 Non-Control. ISO transport protocol class 2 for non-control data communication.
TCP/UDP
System & Infrastructure
Security Considerations
Port 399 (ISO-TSAP-C2) 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.