:131
(TCP/UDP)
Cisco-TNA
Low RiskTCP/UDP — System & Infrastructure
On this page
Port Overview
Port Number
131
Service Name
Cisco-TNA
Transport Protocol
TCP/UDP
Category
System & Infrastructure
Security Risk
Low
Port Range
Well-Known (0-1023)
What is Port 131?
Cisco TNATIVE. Used by Cisco Systems for TNATIVE protocol communication between networking equipment.
TCP/UDP
System & Infrastructure
Security Considerations
Port 131 (Cisco-TNA) 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.