Port 7471Stateless Transport Tunneling (STT)

STT carries encapsulated Ethernet frames over TCP for network virtualization and data-center overlays.

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

also known as sttunnel, STT

Technical Details

what runs on :7471

STT carries Ethernet frames in an encapsulation sent to TCP destination port 7471. It was designed to take advantage of NIC TCP segmentation offload and receive-side aggregation, reducing per-packet processing overhead for virtualized networking. Despite the TCP header, STT is not an ordinary application byte-stream service; its stateless design avoids the usual TCP connection and reliability semantics. The IANA assignment is for STT itself, not a web or remote-login service.

Security Information

exposure of :7471

risk score

2/ 10safe

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

network services averages 2.6 across 1,773 ports — this one sits 0.6 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

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

STT does not provide encryption or peer authentication, so tunneled traffic should be treated as exposed to the underlay network. A reachable STT endpoint may accept or emit encapsulated Ethernet traffic; keep the port on trusted virtualization networks and filter it from the public internet. Its rarity in internet scans makes accidental public exposure less common, but does not make an exposed tunnel safe.

Record

iana registry entry

port: :7471
service: Stateless Transport Tunneling (STT)
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services Virtualization
usage: STT is a network-virtualization tunneling protocol assigned TCP port 7471, associated with software-defined data-center networks. It is uncommon on the public internet; an engineer is more likely to encounter it on a virtualized network fabric than on a general-purpose host.
lookups: 0rank 993
added: 2026-10-12
updated: 2026-10-12
references: IANA service name registry — port 7471

Something wrong?

This record is maintained by the engineers who use port 7471. 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 2026-10-12.

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edit this record →back to the registry

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all 1,773 in network services →

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:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :7471Stateless Transport Tunneling (STT)

Technical Details

Security Information

Related Ports

Port 7471Stateless Transport Tunneling (STT)