Port 2177qWAVE

qWAVE uses TCP and UDP port 2177 for bandwidth estimation.

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

also known as qWAVE Bandwidth Estimate

Technical Details

what runs on :2177

qWAVE is a Windows multimedia quality-of-service facility associated with the Quality Windows Audio Video Experience service. Port 2177 is registered for both TCP and UDP; qWAVE deployments commonly use UDP for bandwidth-estimation and network-quality measurement traffic, with the Windows service handling the protocol exchanges. It is a proprietary Windows service protocol rather than a broadly implemented application protocol, and exact framing and handshake details are not generally exposed as a public wire standard. The service is normally reached by Windows multimedia software through the qWAVE API, not operated as a standalone server.

Security Information

exposure of :2177

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 1,754 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 · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

qWAVE is not intended to be exposed to the public Internet. Its traffic is not encrypted by default, and an Internet-facing Windows qWAVE endpoint would provide an unnecessary service for probing or abuse; restrict port 2177 to trusted local networks or block it at the perimeter. No broadly known Internet-scale qWAVE exploitation is associated with this port.

Record

iana registry entry

port: :2177
service: qWAVE
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services System
usage: This port is used by Microsoft's qWAVE service, which helps Windows multimedia applications estimate bandwidth and assess network quality. Engineers usually encounter it on Windows systems supporting real-time audio or video, rather than as a general Internet-facing service.
lookups: 0rank 993
added: 2026-09-21
updated: 2026-09-22
references: IANA service name registry — port 2177

Something wrong?

This record is maintained by the engineers who use port 2177. 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 2026-09-22.

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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :2177qWAVE

Technical Details

Security Information

Related Ports

Port 2177qWAVE