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// Other services

Port 2378: DALI lighting control

Port 2378 is assigned by IANA to dali (DALI lighting control).

2378

How dali works

Other services
client:2378daliresponse client:2378daliresponse

The client sends a request to port 2378 and the dali service answers.

Transport
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 2378 dangerous?

We have no specific security note for port 2378. 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 2378

ServicePortTransportDescriptionReferenceUpdated
dali 2378 UDP DALI lighting control - 2020-11-24
-2378-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 2378, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2378'      # process listening on 2378
sudo lsof -nP -i :2378

macOS

sudo lsof -nP -i :2378

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2378 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2378
netstat -ano | findstr :2378

From another machine

nmap -p 2378 -sV <host>
sudo nmap -sU -p 2378 <host>
nc -zv <host> 2378

Block it in the firewall

sudo ufw deny 2378/udp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2378" -Direction Inbound -LocalPort 2378 -Protocol UDP -Action Block  # Windows
04 FAQ
What is port 2378 used for?

Port 2378 is assigned by IANA to dali (DALI lighting control).

Is port 2378 TCP or UDP?

Port 2378 is registered for UDP.

Is it safe to open port 2378?

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 2378 is open?

On Linux run "ss -ltnup 'sport = :2378'", on macOS "lsof -nP -i :2378", and on Windows "netstat -ano | findstr :2378" to see the local process. From another machine, "nmap -p 2378 <host>" shows whether it is reachable.

05 Related
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