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// Messaging & queues

Port 9111: Multiple Purpose, Distributed Message Bus

Port 9111 is assigned by IANA to hexxorecore (Multiple Purpose, Distributed Message Bus).

9111

How hexxorecore works

Messaging & queues
producerconsumerqueuehexxorecore producerconsumerqueuehexxorecore

Producers publish messages into a queue on port 9111; 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 9111 dangerous?

We have no specific security note for port 9111. 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 9111

ServicePortTransportDescriptionReferenceUpdated
hexxorecore 9111 TCP, UDP Multiple Purpose, Distributed Message Bus - 2018-07-31

// source: IANA service name and port number registry

03 Check it

Which program uses port 9111, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9111'      # process listening on 9111
sudo lsof -nP -i :9111

macOS

sudo lsof -nP -i :9111

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9111 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9111
netstat -ano | findstr :9111

From another machine

nmap -p 9111 -sV <host>
sudo nmap -sU -p 9111 <host>
nc -zv <host> 9111

Block it in the firewall

sudo ufw deny 9111/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9111" -Direction Inbound -LocalPort 9111 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9111 used for?

Port 9111 is assigned by IANA to hexxorecore (Multiple Purpose, Distributed Message Bus).

Is port 9111 TCP or UDP?

Port 9111 is registered for TCP and UDP.

Is it safe to open port 9111?

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 9111 is open?

On Linux run "ss -ltnup 'sport = :9111'", on macOS "lsof -nP -i :9111", and on Windows "netstat -ano | findstr :9111" to see the local process. From another machine, "nmap -p 9111 <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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