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// Other services

Port 12321: Warehouse Monitoring Syst SSS

Port 12321 is assigned by IANA to warehouse-sss (Warehouse Monitoring Syst SSS).

12321

How warehouse-sss works

Other services
client:12321warehouse-sssresponse client:12321warehouse-sssresponse

The client sends a request to port 12321 and the warehouse-sss 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 12321 dangerous?

We have no specific security note for port 12321. 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 12321

ServicePortTransportDescriptionReferenceUpdated
warehouse-sss 12321 TCP, UDP Warehouse Monitoring Syst SSS - 2005-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 12321, and is it reachable?

Linux

sudo ss -ltnup 'sport = :12321'      # process listening on 12321
sudo lsof -nP -i :12321

macOS

sudo lsof -nP -i :12321

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 12321 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 12321
netstat -ano | findstr :12321

From another machine

nmap -p 12321 -sV <host>
sudo nmap -sU -p 12321 <host>
nc -zv <host> 12321

Block it in the firewall

sudo ufw deny 12321/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 12321" -Direction Inbound -LocalPort 12321 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 12321 used for?

Port 12321 is assigned by IANA to warehouse-sss (Warehouse Monitoring Syst SSS).

Is port 12321 TCP or UDP?

Port 12321 is registered for TCP and UDP.

Is it safe to open port 12321?

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 12321 is open?

On Linux run "ss -ltnup 'sport = :12321'", on macOS "lsof -nP -i :12321", and on Windows "netstat -ano | findstr :12321" to see the local process. From another machine, "nmap -p 12321 <host>" shows whether it is reachable.

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