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// Other services

Port 2177: qWAVE Bandwidth Estimate

Port 2177 is assigned by IANA to qwave (qWAVE Bandwidth Estimate).

2177

How qwave works

Other services
client:2177qwaveresponse client:2177qwaveresponse

The client sends a request to port 2177 and the qwave service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 2177 dangerous?

We have no specific security note for port 2177. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 2177

ServicePortTransportDescriptionReferenceUpdated
qwave 2177 TCP, UDP qWAVE Bandwidth Estimate - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 2177, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2177'      # process listening on 2177
sudo lsof -nP -i :2177

macOS

sudo lsof -nP -i :2177

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2177 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2177
netstat -ano | findstr :2177

From another machine

nmap -p 2177 -sV <host>
sudo nmap -sU -p 2177 <host>
nc -zv <host> 2177

Block it in the firewall

sudo ufw deny 2177/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2177" -Direction Inbound -LocalPort 2177 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2177 used for?

Port 2177 is assigned by IANA to qwave (qWAVE Bandwidth Estimate).

Is port 2177 TCP or UDP?

Port 2177 is registered for TCP and UDP.

Is it safe to open port 2177?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 2177 is open?

On Linux run "ss -ltnup 'sport = :2177'", on macOS "lsof -nP -i :2177", and on Windows "netstat -ano | findstr :2177" to see the local process. From another machine, "nmap -p 2177 <host>" shows whether it is reachable.

05 Related
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