CyberHunter
Local dataset, no network
// Other services

Port 26263: K3 Software-Client

Port 26263 is assigned by IANA to k3software-cli (K3 Software-Client).

26263

How k3software-cli works

Other services
client:26263k3software-cliresponse client:26263k3software-cliresponse

The client sends a request to port 26263 and the k3software-cli 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 26263 dangerous?

We have no specific security note for port 26263. 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 26263

ServicePortTransportDescriptionReferenceUpdated
k3software-cli 26263 TCP, UDP K3 Software-Client - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 26263, and is it reachable?

Linux

sudo ss -ltnup 'sport = :26263'      # process listening on 26263
sudo lsof -nP -i :26263

macOS

sudo lsof -nP -i :26263

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 26263 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 26263
netstat -ano | findstr :26263

From another machine

nmap -p 26263 -sV <host>
sudo nmap -sU -p 26263 <host>
nc -zv <host> 26263

Block it in the firewall

sudo ufw deny 26263/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 26263" -Direction Inbound -LocalPort 26263 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 26263 used for?

Port 26263 is assigned by IANA to k3software-cli (K3 Software-Client).

Is port 26263 TCP or UDP?

Port 26263 is registered for TCP and UDP.

Is it safe to open port 26263?

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 26263 is open?

On Linux run "ss -ltnup 'sport = :26263'", on macOS "lsof -nP -i :26263", and on Windows "netstat -ano | findstr :26263" to see the local process. From another machine, "nmap -p 26263 <host>" shows whether it is reachable.

05 Related
:4444 Metasploit default / krb524 tcp · udp · high risk :31337 Back Orifice / elite tcp · udp · high risk :1 TCP Port Service Multiplexer tcp · udp :5 Remote Job Entry tcp · udp :9 Discard tcp · udp · sctp · dccp :11 Active Users tcp · udp :17 Quote of the Day tcp · udp :18 Message Send Protocol (historic) tcp · udp

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