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// Other services

Port 4902: magicCONROL RF and Data Interface

Port 4902 is assigned by IANA to magiccontrol (magicCONROL RF and Data Interface).

4902

How magiccontrol works

Other services
client:4902magiccontrolresponse client:4902magiccontrolresponse

The client sends a request to port 4902 and the magiccontrol 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 4902 dangerous?

We have no specific security note for port 4902. 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 4902

ServicePortTransportDescriptionReferenceUpdated
magiccontrol 4902 TCP magicCONROL RF and Data Interface - 2008-11-24
-4902-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 4902, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4902'      # process listening on 4902
sudo lsof -nP -i :4902

macOS

sudo lsof -nP -i :4902

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4902 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4902
netstat -ano | findstr :4902

From another machine

nmap -p 4902 -sV <host>
nc -zv <host> 4902

Block it in the firewall

sudo ufw deny 4902/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4902" -Direction Inbound -LocalPort 4902 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4902 used for?

Port 4902 is assigned by IANA to magiccontrol (magicCONROL RF and Data Interface).

Is port 4902 TCP or UDP?

Port 4902 is registered for TCP.

Is it safe to open port 4902?

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 4902 is open?

On Linux run "ss -ltnup 'sport = :4902'", on macOS "lsof -nP -i :4902", and on Windows "netstat -ano | findstr :4902" to see the local process. From another machine, "nmap -p 4902 <host>" shows whether it is reachable.

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