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// Other services

Port 5253: Kohler Power Device Protocol

Port 5253 is assigned by IANA to kpdp (Kohler Power Device Protocol).

5253

How kpdp works

Other services
client:5253kpdpresponse client:5253kpdpresponse

The client sends a request to port 5253 and the kpdp 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 5253 dangerous?

We have no specific security note for port 5253. 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 5253

ServicePortTransportDescriptionReferenceUpdated
kpdp 5253 TCP Kohler Power Device Protocol - 2010-11-01
-5253-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 5253, and is it reachable?

Linux

sudo ss -ltnup 'sport = :5253'      # process listening on 5253
sudo lsof -nP -i :5253

macOS

sudo lsof -nP -i :5253

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 5253 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 5253
netstat -ano | findstr :5253

From another machine

nmap -p 5253 -sV <host>
nc -zv <host> 5253

Block it in the firewall

sudo ufw deny 5253/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 5253" -Direction Inbound -LocalPort 5253 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 5253 used for?

Port 5253 is assigned by IANA to kpdp (Kohler Power Device Protocol).

Is port 5253 TCP or UDP?

Port 5253 is registered for TCP.

Is it safe to open port 5253?

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 5253 is open?

On Linux run "ss -ltnup 'sport = :5253'", on macOS "lsof -nP -i :5253", and on Windows "netstat -ano | findstr :5253" to see the local process. From another machine, "nmap -p 5253 <host>" shows whether it is reachable.

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