CyberHunter
Local dataset, no network
// Other services

Port 1563: Cadabra License Manager

Port 1563 is assigned by IANA to cadabra-lm (Cadabra License Manager).

1563

How cadabra-lm works

Other services
client:1563cadabra-lmresponse client:1563cadabra-lmresponse

The client sends a request to port 1563 and the cadabra-lm 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 1563 dangerous?

We have no specific security note for port 1563. 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 1563

ServicePortTransportDescriptionReferenceUpdated
cadabra-lm 1563 TCP, UDP Cadabra License Manager - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 1563, and is it reachable?

Linux

sudo ss -ltnup 'sport = :1563'      # process listening on 1563
sudo lsof -nP -i :1563

macOS

sudo lsof -nP -i :1563

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 1563 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 1563
netstat -ano | findstr :1563

From another machine

nmap -p 1563 -sV <host>
sudo nmap -sU -p 1563 <host>
nc -zv <host> 1563

Block it in the firewall

sudo ufw deny 1563/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 1563" -Direction Inbound -LocalPort 1563 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 1563 used for?

Port 1563 is assigned by IANA to cadabra-lm (Cadabra License Manager).

Is port 1563 TCP or UDP?

Port 1563 is registered for TCP and UDP.

Is it safe to open port 1563?

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 1563 is open?

On Linux run "ss -ltnup 'sport = :1563'", on macOS "lsof -nP -i :1563", and on Windows "netstat -ano | findstr :1563" to see the local process. From another machine, "nmap -p 1563 <host>" shows whether it is reachable.

05 Related
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