CyberHunter
Local dataset, no network
// Other services

Port 23333: Emulex HBAnyware Remote Management

Port 23333 is assigned by IANA to elxmgmt (Emulex HBAnyware Remote Management).

23333

How elxmgmt works

Other services
client:23333elxmgmtresponse client:23333elxmgmtresponse

The client sends a request to port 23333 and the elxmgmt 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 23333 dangerous?

We have no specific security note for port 23333. 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 23333

ServicePortTransportDescriptionReferenceUpdated
elxmgmt 23333 TCP, UDP Emulex HBAnyware Remote Management - 2007-11-06

// source: IANA service name and port number registry

03 Check it

Which program uses port 23333, and is it reachable?

Linux

sudo ss -ltnup 'sport = :23333'      # process listening on 23333
sudo lsof -nP -i :23333

macOS

sudo lsof -nP -i :23333

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 23333 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 23333
netstat -ano | findstr :23333

From another machine

nmap -p 23333 -sV <host>
sudo nmap -sU -p 23333 <host>
nc -zv <host> 23333

Block it in the firewall

sudo ufw deny 23333/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 23333" -Direction Inbound -LocalPort 23333 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 23333 used for?

Port 23333 is assigned by IANA to elxmgmt (Emulex HBAnyware Remote Management).

Is port 23333 TCP or UDP?

Port 23333 is registered for TCP and UDP.

Is it safe to open port 23333?

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 23333 is open?

On Linux run "ss -ltnup 'sport = :23333'", on macOS "lsof -nP -i :23333", and on Windows "netstat -ano | findstr :23333" to see the local process. From another machine, "nmap -p 23333 <host>" shows whether it is reachable.

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