CyberHunter
Local dataset, no network
// Other services

Port 47809: PreSonus Universal Control Network Protocol

Port 47809 is assigned by IANA to presonus-ucnet (PreSonus Universal Control Network Protocol).

47809

How presonus-ucnet works

Other services
client:47809presonus-ucnetresponse client:47809presonus-ucnetresponse

The client sends a request to port 47809 and the presonus-ucnet service answers.

Transport
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 47809 dangerous?

We have no specific security note for port 47809. 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 47809

ServicePortTransportDescriptionReferenceUpdated
presonus-ucnet 47809 UDP PreSonus Universal Control Network Protocol - 2013-07-12
-47809-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 47809, and is it reachable?

Linux

sudo ss -ltnup 'sport = :47809'      # process listening on 47809
sudo lsof -nP -i :47809

macOS

sudo lsof -nP -i :47809

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 47809 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 47809
netstat -ano | findstr :47809

From another machine

nmap -p 47809 -sV <host>
sudo nmap -sU -p 47809 <host>
nc -zv <host> 47809

Block it in the firewall

sudo ufw deny 47809/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 47809" -Direction Inbound -LocalPort 47809 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 47809 used for?

Port 47809 is assigned by IANA to presonus-ucnet (PreSonus Universal Control Network Protocol).

Is port 47809 TCP or UDP?

Port 47809 is registered for UDP.

Is it safe to open port 47809?

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 47809 is open?

On Linux run "ss -ltnup 'sport = :47809'", on macOS "lsof -nP -i :47809", and on Windows "netstat -ano | findstr :47809" to see the local process. From another machine, "nmap -p 47809 <host>" shows whether it is reachable.

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