CyberHunter
Local dataset, no network
// Other services

Port 9594: Message System

Port 9594 is assigned by IANA to msgsys (Message System).

9594

How msgsys works

Other services
client:9594msgsysresponse client:9594msgsysresponse

The client sends a request to port 9594 and the msgsys 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
Registered (1024-49151)
Category
Other services
01 Security

Is port 9594 dangerous?

We have no specific security note for port 9594. 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 9594

ServicePortTransportDescriptionReferenceUpdated
msgsys 9594 TCP, UDP Message System - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 9594, and is it reachable?

Linux

sudo ss -ltnup 'sport = :9594'      # process listening on 9594
sudo lsof -nP -i :9594

macOS

sudo lsof -nP -i :9594

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 9594 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 9594
netstat -ano | findstr :9594

From another machine

nmap -p 9594 -sV <host>
sudo nmap -sU -p 9594 <host>
nc -zv <host> 9594

Block it in the firewall

sudo ufw deny 9594/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 9594" -Direction Inbound -LocalPort 9594 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 9594 used for?

Port 9594 is assigned by IANA to msgsys (Message System).

Is port 9594 TCP or UDP?

Port 9594 is registered for TCP and UDP.

Is it safe to open port 9594?

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 9594 is open?

On Linux run "ss -ltnup 'sport = :9594'", on macOS "lsof -nP -i :9594", and on Windows "netstat -ano | findstr :9594" to see the local process. From another machine, "nmap -p 9594 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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