CyberHunter
Local dataset, no network
// Other services

Port 1399: Cadkey License Manager

Port 1399 is assigned by IANA to cadkey-licman (Cadkey License Manager).

1399

How cadkey-licman works

Other services
client:1399cadkey-licmanresponse client:1399cadkey-licmanresponse

The client sends a request to port 1399 and the cadkey-licman 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 1399 dangerous?

We have no specific security note for port 1399. 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 1399

ServicePortTransportDescriptionReferenceUpdated
cadkey-licman 1399 TCP, UDP Cadkey License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1399, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1399'      # process listening on 1399
sudo lsof -nP -i :1399

macOS

sudo lsof -nP -i :1399

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1399 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1399
netstat -ano | findstr :1399

From another machine

nmap -p 1399 -sV <host>
sudo nmap -sU -p 1399 <host>
nc -zv <host> 1399

Block it in the firewall

sudo ufw deny 1399/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1399" -Direction Inbound -LocalPort 1399 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1399 used for?

Port 1399 is assigned by IANA to cadkey-licman (Cadkey License Manager).

Is port 1399 TCP or UDP?

Port 1399 is registered for TCP and UDP.

Is it safe to open port 1399?

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 1399 is open?

On Linux run "ss -ltnup 'sport = :1399'", on macOS "lsof -nP -i :1399", and on Windows "netstat -ano | findstr :1399" to see the local process. From another machine, "nmap -p 1399 <host>" shows whether it is reachable.

05 Related
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