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// Other services

Port 372: ListProcessor

Port 372 is assigned by IANA to ulistproc (ListProcessor).

372

How ulistproc works

Other services
client:372ulistprocresponse client:372ulistprocresponse

The client sends a request to port 372 and the ulistproc 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 372 dangerous?

We have no specific security note for port 372. 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 372

ServicePortTransportDescriptionReferenceUpdated
ulistproc 372 TCP, UDP ListProcessor - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 372, and is it reachable?

Linux

sudo ss -ltnup 'sport = :372'      # process listening on 372
sudo lsof -nP -i :372

macOS

sudo lsof -nP -i :372

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 372 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 372
netstat -ano | findstr :372

From another machine

nmap -p 372 -sV <host>
sudo nmap -sU -p 372 <host>
nc -zv <host> 372

Block it in the firewall

sudo ufw deny 372/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 372" -Direction Inbound -LocalPort 372 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 372 used for?

Port 372 is assigned by IANA to ulistproc (ListProcessor).

Is port 372 TCP or UDP?

Port 372 is registered for TCP and UDP.

Is it safe to open port 372?

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 372 is open?

On Linux run "ss -ltnup 'sport = :372'", on macOS "lsof -nP -i :372", and on Windows "netstat -ano | findstr :372" to see the local process. From another machine, "nmap -p 372 <host>" shows whether it is reachable.

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