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// Other services

Port 3564: Electromed SIM port

Port 3564 is assigned by IANA to esimport (Electromed SIM port).

3564

How esimport works

Other services
client:3564esimportresponse client:3564esimportresponse

The client sends a request to port 3564 and the esimport 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 3564 dangerous?

We have no specific security note for port 3564. 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 3564

ServicePortTransportDescriptionReferenceUpdated
esimport 3564 TCP, UDP Electromed SIM port - 2002-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 3564, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3564'      # process listening on 3564
sudo lsof -nP -i :3564

macOS

sudo lsof -nP -i :3564

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3564 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3564
netstat -ano | findstr :3564

From another machine

nmap -p 3564 -sV <host>
sudo nmap -sU -p 3564 <host>
nc -zv <host> 3564

Block it in the firewall

sudo ufw deny 3564/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3564" -Direction Inbound -LocalPort 3564 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3564 used for?

Port 3564 is assigned by IANA to esimport (Electromed SIM port).

Is port 3564 TCP or UDP?

Port 3564 is registered for TCP and UDP.

Is it safe to open port 3564?

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 3564 is open?

On Linux run "ss -ltnup 'sport = :3564'", on macOS "lsof -nP -i :3564", and on Windows "netstat -ano | findstr :3564" to see the local process. From another machine, "nmap -p 3564 <host>" shows whether it is reachable.

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