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// Other services

Port 4912: Technicolor LUT Access Protocol

Port 4912 is assigned by IANA to lutap (Technicolor LUT Access Protocol).

4912

How lutap works

Other services
client:4912lutapresponse client:4912lutapresponse

The client sends a request to port 4912 and the lutap service answers.

Transport
TCP
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 4912 dangerous?

We have no specific security note for port 4912. 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 4912

ServicePortTransportDescriptionReferenceUpdated
lutap 4912 TCP Technicolor LUT Access Protocol - 2009-02-17
-4912-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4912, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4912'      # process listening on 4912
sudo lsof -nP -i :4912

macOS

sudo lsof -nP -i :4912

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4912 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4912
netstat -ano | findstr :4912

From another machine

nmap -p 4912 -sV <host>
nc -zv <host> 4912

Block it in the firewall

sudo ufw deny 4912/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4912" -Direction Inbound -LocalPort 4912 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4912 used for?

Port 4912 is assigned by IANA to lutap (Technicolor LUT Access Protocol).

Is port 4912 TCP or UDP?

Port 4912 is registered for TCP.

Is it safe to open port 4912?

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 4912 is open?

On Linux run "ss -ltnup 'sport = :4912'", on macOS "lsof -nP -i :4912", and on Windows "netstat -ano | findstr :4912" to see the local process. From another machine, "nmap -p 4912 <host>" shows whether it is reachable.

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