CyberHunter
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// Other services

Port 1441: Cadis License Management

Port 1441 is assigned by IANA to cadis-1 (Cadis License Management).

1441

How cadis-1 works

Other services
client:1441cadis-1response client:1441cadis-1response

The client sends a request to port 1441 and the cadis-1 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 1441 dangerous?

We have no specific security note for port 1441. 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 1441

ServicePortTransportDescriptionReferenceUpdated
cadis-1 1441 TCP, UDP Cadis License Management - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1441, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1441'      # process listening on 1441
sudo lsof -nP -i :1441

macOS

sudo lsof -nP -i :1441

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1441 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1441
netstat -ano | findstr :1441

From another machine

nmap -p 1441 -sV <host>
sudo nmap -sU -p 1441 <host>
nc -zv <host> 1441

Block it in the firewall

sudo ufw deny 1441/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1441" -Direction Inbound -LocalPort 1441 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1441 used for?

Port 1441 is assigned by IANA to cadis-1 (Cadis License Management).

Is port 1441 TCP or UDP?

Port 1441 is registered for TCP and UDP.

Is it safe to open port 1441?

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 1441 is open?

On Linux run "ss -ltnup 'sport = :1441'", on macOS "lsof -nP -i :1441", and on Windows "netstat -ano | findstr :1441" to see the local process. From another machine, "nmap -p 1441 <host>" shows whether it is reachable.

05 Related
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