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Local dataset, no network
// Other services

Port 2523: Qke LLC V.3

Port 2523 is assigned by IANA to qke-llc-v3 (Qke LLC V.3).

2523

How qke-llc-v3 works

Other services
client:2523qke-llc-v3response client:2523qke-llc-v3response

The client sends a request to port 2523 and the qke-llc-v3 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 2523 dangerous?

We have no specific security note for port 2523. 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 2523

ServicePortTransportDescriptionReferenceUpdated
qke-llc-v3 2523 TCP, UDP Qke LLC V.3 - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2523, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2523'      # process listening on 2523
sudo lsof -nP -i :2523

macOS

sudo lsof -nP -i :2523

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2523 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2523
netstat -ano | findstr :2523

From another machine

nmap -p 2523 -sV <host>
sudo nmap -sU -p 2523 <host>
nc -zv <host> 2523

Block it in the firewall

sudo ufw deny 2523/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2523" -Direction Inbound -LocalPort 2523 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2523 used for?

Port 2523 is assigned by IANA to qke-llc-v3 (Qke LLC V.3).

Is port 2523 TCP or UDP?

Port 2523 is registered for TCP and UDP.

Is it safe to open port 2523?

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 2523 is open?

On Linux run "ss -ltnup 'sport = :2523'", on macOS "lsof -nP -i :2523", and on Windows "netstat -ano | findstr :2523" to see the local process. From another machine, "nmap -p 2523 <host>" shows whether it is reachable.

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