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// Other services

Port 5306: Sun MC Group

Port 5306 is assigned by IANA to sun-mc-grp (Sun MC Group).

5306

How sun-mc-grp works

Other services
client:5306sun-mc-grpresponse client:5306sun-mc-grpresponse

The client sends a request to port 5306 and the sun-mc-grp 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 5306 dangerous?

We have no specific security note for port 5306. 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 5306

ServicePortTransportDescriptionReferenceUpdated
sun-mc-grp 5306 TCP, UDP Sun MC Group - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 5306, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5306'      # process listening on 5306
sudo lsof -nP -i :5306

macOS

sudo lsof -nP -i :5306

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5306 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5306
netstat -ano | findstr :5306

From another machine

nmap -p 5306 -sV <host>
sudo nmap -sU -p 5306 <host>
nc -zv <host> 5306

Block it in the firewall

sudo ufw deny 5306/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5306" -Direction Inbound -LocalPort 5306 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5306 used for?

Port 5306 is assigned by IANA to sun-mc-grp (Sun MC Group).

Is port 5306 TCP or UDP?

Port 5306 is registered for TCP and UDP.

Is it safe to open port 5306?

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 5306 is open?

On Linux run "ss -ltnup 'sport = :5306'", on macOS "lsof -nP -i :5306", and on Windows "netstat -ano | findstr :5306" to see the local process. From another machine, "nmap -p 5306 <host>" shows whether it is reachable.

05 Related
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