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// Other services

Port 3566: Quest Data Hub

Port 3566 is assigned by IANA to quest-data-hub (Quest Data Hub).

3566

How quest-data-hub works

Other services
client:3566quest-data-hubresponse client:3566quest-data-hubresponse

The client sends a request to port 3566 and the quest-data-hub service answers.

Transport
TCP
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 3566 dangerous?

We have no specific security note for port 3566. 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 3566

ServicePortTransportDescriptionReferenceUpdated
quest-data-hub 3566 TCP Quest Data Hub - 2010-10-18
-3566-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 3566, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3566'      # process listening on 3566
sudo lsof -nP -i :3566

macOS

sudo lsof -nP -i :3566

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3566 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3566
netstat -ano | findstr :3566

From another machine

nmap -p 3566 -sV <host>
nc -zv <host> 3566

Block it in the firewall

sudo ufw deny 3566/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3566" -Direction Inbound -LocalPort 3566 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3566 used for?

Port 3566 is assigned by IANA to quest-data-hub (Quest Data Hub).

Is port 3566 TCP or UDP?

Port 3566 is registered for TCP.

Is it safe to open port 3566?

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 3566 is open?

On Linux run "ss -ltnup 'sport = :3566'", on macOS "lsof -nP -i :3566", and on Windows "netstat -ano | findstr :3566" to see the local process. From another machine, "nmap -p 3566 <host>" shows whether it is reachable.

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