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// Messaging & queues

Port 47000: Message Bus

Port 47000 is assigned by IANA to mbus (Message Bus).

47000

How mbus works

Messaging & queues
producerconsumerqueuembus producerconsumerqueuembus

Producers publish messages into a queue on port 47000; consumers pick them up in order, at their own pace.

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
Messaging & queues
01 Security

Is port 47000 dangerous?

We have no specific security note for port 47000. Its risk depends on the program actually listening on it. General advice for messaging & queues services:

  • Require authentication and TLS on brokers and coordination services.
  • Restrict clients by network and per-topic or per-queue permissions.
  • Remove default accounts.
02 Registry

IANA registry entries for port 47000

ServicePortTransportDescriptionReferenceUpdated
mbus 47000 TCP, UDP Message Bus - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 47000, and is it reachable?

Linux

sudo ss -ltnup 'sport = :47000'      # process listening on 47000
sudo lsof -nP -i :47000

macOS

sudo lsof -nP -i :47000

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 47000 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 47000
netstat -ano | findstr :47000

From another machine

nmap -p 47000 -sV <host>
sudo nmap -sU -p 47000 <host>
nc -zv <host> 47000

Block it in the firewall

sudo ufw deny 47000/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 47000" -Direction Inbound -LocalPort 47000 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 47000 used for?

Port 47000 is assigned by IANA to mbus (Message Bus).

Is port 47000 TCP or UDP?

Port 47000 is registered for TCP and UDP.

Is it safe to open port 47000?

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. Require authentication and TLS on brokers and coordination services.

How do I check if port 47000 is open?

On Linux run "ss -ltnup 'sport = :47000'", on macOS "lsof -nP -i :47000", and on Windows "netstat -ano | findstr :47000" to see the local process. From another machine, "nmap -p 47000 <host>" shows whether it is reachable.

05 Related
:5672 AMQP (RabbitMQ) tcp · udp · sctp · high risk :9092 Apache Kafka tcp · udp · high risk :2181 ZooKeeper tcp · udp · high risk :15672 RabbitMQ management tcp · high risk :1881 IBM WebSphere MQ Everyplace tcp · udp :2230 MetaSoft Job Queue Administration Service tcp · udp :2664 Patrol for MQ GM tcp · udp :2665 Patrol for MQ NM tcp · udp

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