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// Other services

Port 2531: ITO-E GUI

Port 2531 is assigned by IANA to ito-e-gui (ITO-E GUI).

2531

How ito-e-gui works

Other services
client:2531ito-e-guiresponse client:2531ito-e-guiresponse

The client sends a request to port 2531 and the ito-e-gui 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 2531 dangerous?

We have no specific security note for port 2531. 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 2531

ServicePortTransportDescriptionReferenceUpdated
ito-e-gui 2531 TCP, UDP ITO-E GUI - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2531, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2531'      # process listening on 2531
sudo lsof -nP -i :2531

macOS

sudo lsof -nP -i :2531

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2531 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2531
netstat -ano | findstr :2531

From another machine

nmap -p 2531 -sV <host>
sudo nmap -sU -p 2531 <host>
nc -zv <host> 2531

Block it in the firewall

sudo ufw deny 2531/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2531" -Direction Inbound -LocalPort 2531 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2531 used for?

Port 2531 is assigned by IANA to ito-e-gui (ITO-E GUI).

Is port 2531 TCP or UDP?

Port 2531 is registered for TCP and UDP.

Is it safe to open port 2531?

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 2531 is open?

On Linux run "ss -ltnup 'sport = :2531'", on macOS "lsof -nP -i :2531", and on Windows "netstat -ano | findstr :2531" to see the local process. From another machine, "nmap -p 2531 <host>" shows whether it is reachable.

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