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// Other services

Port 20013: Samsung Interdevice Interaction

Port 20013 is assigned by IANA to ss-idi (Samsung Interdevice Interaction).

20013

How ss-idi works

Other services
client:20013ss-idiresponse client:20013ss-idiresponse

The client sends a request to port 20013 and the ss-idi 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 20013 dangerous?

We have no specific security note for port 20013. 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 20013

ServicePortTransportDescriptionReferenceUpdated
ss-idi 20013 TCP Samsung Interdevice Interaction - -
-20013-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 20013, and is it reachable?

Linux

sudo ss -ltnup 'sport = :20013'      # process listening on 20013
sudo lsof -nP -i :20013

macOS

sudo lsof -nP -i :20013

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 20013 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 20013
netstat -ano | findstr :20013

From another machine

nmap -p 20013 -sV <host>
nc -zv <host> 20013

Block it in the firewall

sudo ufw deny 20013/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 20013" -Direction Inbound -LocalPort 20013 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 20013 used for?

Port 20013 is assigned by IANA to ss-idi (Samsung Interdevice Interaction).

Is port 20013 TCP or UDP?

Port 20013 is registered for TCP.

Is it safe to open port 20013?

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 20013 is open?

On Linux run "ss -ltnup 'sport = :20013'", on macOS "lsof -nP -i :20013", and on Windows "netstat -ano | findstr :20013" to see the local process. From another machine, "nmap -p 20013 <host>" shows whether it is reachable.

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