CyberHunter
Local dataset, no network
// Other services

Port 4452: CTI Program Load

Port 4452 is assigned by IANA to ctiprogramload (CTI Program Load).

4452

How ctiprogramload works

Other services
client:4452ctiprogramloadresponse client:4452ctiprogramloadresponse

The client sends a request to port 4452 and the ctiprogramload 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 4452 dangerous?

We have no specific security note for port 4452. 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 4452

ServicePortTransportDescriptionReferenceUpdated
ctiprogramload 4452 TCP, UDP CTI Program Load - 2011-10-28

// source: IANA service name and port number registry

03 Check it

Which program uses port 4452, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4452'      # process listening on 4452
sudo lsof -nP -i :4452

macOS

sudo lsof -nP -i :4452

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4452 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4452
netstat -ano | findstr :4452

From another machine

nmap -p 4452 -sV <host>
sudo nmap -sU -p 4452 <host>
nc -zv <host> 4452

Block it in the firewall

sudo ufw deny 4452/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4452" -Direction Inbound -LocalPort 4452 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4452 used for?

Port 4452 is assigned by IANA to ctiprogramload (CTI Program Load).

Is port 4452 TCP or UDP?

Port 4452 is registered for TCP and UDP.

Is it safe to open port 4452?

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 4452 is open?

On Linux run "ss -ltnup 'sport = :4452'", on macOS "lsof -nP -i :4452", and on Windows "netstat -ano | findstr :4452" to see the local process. From another machine, "nmap -p 4452 <host>" shows whether it is reachable.

05 Related
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