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// Other services

Port 38002: Cresco Controller

Port 38002 is assigned by IANA to cresco-control (Cresco Controller), crescoctrl-disc (Cresco Controller Discovery).

38002

How cresco-control works

Other services
client:38002cresco-controlresponse client:38002cresco-controlresponse

The client sends a request to port 38002 and the cresco-control service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned2 registered services
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 38002 dangerous?

We have no specific security note for port 38002. 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 38002

ServicePortTransportDescriptionReferenceUpdated
cresco-control 38002 TCP Cresco Controller - 2014-11-21
crescoctrl-disc 38002 UDP Cresco Controller Discovery - 2014-11-21

// source: IANA service name and port number registry

03 Check it

Which program uses port 38002, and is it reachable?

Linux

sudo ss -ltnup 'sport = :38002'      # process listening on 38002
sudo lsof -nP -i :38002

macOS

sudo lsof -nP -i :38002

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 38002 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 38002
netstat -ano | findstr :38002

From another machine

nmap -p 38002 -sV <host>
sudo nmap -sU -p 38002 <host>
nc -zv <host> 38002

Block it in the firewall

sudo ufw deny 38002/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 38002" -Direction Inbound -LocalPort 38002 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 38002 used for?

Port 38002 is assigned by IANA to cresco-control (Cresco Controller), crescoctrl-disc (Cresco Controller Discovery).

Is port 38002 TCP or UDP?

Port 38002 is registered for TCP and UDP.

Is it safe to open port 38002?

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 38002 is open?

On Linux run "ss -ltnup 'sport = :38002'", on macOS "lsof -nP -i :38002", and on Windows "netstat -ano | findstr :38002" to see the local process. From another machine, "nmap -p 38002 <host>" shows whether it is reachable.

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