Port 271NEA Posture Transport Protocol over TLS

Encrypted TCP transport for exchanging endpoint posture and compliance data in IETF Network Endpoint Assessment.

transport: tcp
in transit: encrypted
assignment: official
risk: 2/10
lookups: 0

also known as pt-tls, NEA PT-TLS

Technical Details

what runs on :271

PT-TLS runs over TCP port 271 and uses TLS to provide the transport for NEA posture exchanges. The TLS session carries framed NEA messages between the endpoint and assessment server, with higher-layer NEA components supplying posture attributes and assessment results. It is distinct from the posture-attribute and assessment protocols transported through it; port 271 is the IANA-registered TCP service for PT-TLS.

Security Information

exposure of :271

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

security averages 3.2 across 323 ports — this one sits 1.2 below.

in transit

encrypted

payloads are protected on the wire

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp

every listening transport is another surface to filter at the edge

security overview

PT-TLS is encrypted by default, but posture data can reveal endpoint configuration, software, and compliance state. It should generally be restricted to authorized NEA clients and assessment servers rather than exposed broadly to the Internet; administrators should still enforce certificate validation, authentication, and current TLS settings.

Record

iana registry entry

port: :271
service: NEA Posture Transport Protocol over TLS
transport: TCP
encryption: tls / encrypted
assignment: iana registered
risk: 2/10safe
category: Security Network Services
usage: This port carries NEA posture-assessment exchanges between a NEA client and a NEA server, usually in enterprise network-access-control deployments. It is uncommon on general-purpose hosts and is normally used by specialized security or endpoint-management software.
lookups: 0rank 994
added: 2026-09-15
updated: 2026-09-15
references: IANA service name registry — port 271
RFC 6876

Something wrong?

This record is maintained by the engineers who use port 271. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-09-15.

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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

3 of 8 encrypted

Port :271NEA Posture Transport Protocol over TLS

Technical Details

Security Information

Related Ports

Port 271NEA Posture Transport Protocol over TLS