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// Other services

Port 2472: C3

Port 2472 is assigned by IANA to c3 (C3).

2472

How c3 works

Other services
client:2472c3response client:2472c3response

The client sends a request to port 2472 and the c3 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 2472 dangerous?

We have no specific security note for port 2472. 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 2472

ServicePortTransportDescriptionReferenceUpdated
c3 2472 TCP, UDP C3 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2472, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2472'      # process listening on 2472
sudo lsof -nP -i :2472

macOS

sudo lsof -nP -i :2472

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2472 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2472
netstat -ano | findstr :2472

From another machine

nmap -p 2472 -sV <host>
sudo nmap -sU -p 2472 <host>
nc -zv <host> 2472

Block it in the firewall

sudo ufw deny 2472/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2472" -Direction Inbound -LocalPort 2472 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2472 used for?

Port 2472 is assigned by IANA to c3 (C3).

Is port 2472 TCP or UDP?

Port 2472 is registered for TCP and UDP.

Is it safe to open port 2472?

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 2472 is open?

On Linux run "ss -ltnup 'sport = :2472'", on macOS "lsof -nP -i :2472", and on Windows "netstat -ano | findstr :2472" to see the local process. From another machine, "nmap -p 2472 <host>" shows whether it is reachable.

05 Related
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