CyberHunter
Local dataset, no network
// Other services

Port 534: windream Admin

Port 534 is assigned by IANA to windream (windream Admin).

534

How windream works

Other services
client:534windreamresponse client:534windreamresponse

The client sends a request to port 534 and the windream 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 534 dangerous?

We have no specific security note for port 534. 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 534

ServicePortTransportDescriptionReferenceUpdated
windream 534 TCP, UDP windream Admin - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 534, and is it reachable?

Linux

sudo ss -ltnup 'sport = :534'      # process listening on 534
sudo lsof -nP -i :534

macOS

sudo lsof -nP -i :534

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 534 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 534
netstat -ano | findstr :534

From another machine

nmap -p 534 -sV <host>
sudo nmap -sU -p 534 <host>
nc -zv <host> 534

Block it in the firewall

sudo ufw deny 534/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 534" -Direction Inbound -LocalPort 534 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 534 used for?

Port 534 is assigned by IANA to windream (windream Admin).

Is port 534 TCP or UDP?

Port 534 is registered for TCP and UDP.

Is it safe to open port 534?

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 534 is open?

On Linux run "ss -ltnup 'sport = :534'", on macOS "lsof -nP -i :534", and on Windows "netstat -ano | findstr :534" to see the local process. From another machine, "nmap -p 534 <host>" shows whether it is reachable.

05 Related
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