CyberHunter
Local dataset, no network
// Other services

Port 25576: Sauter Dongle

Port 25576 is assigned by IANA to sauterdongle (Sauter Dongle).

25576

How sauterdongle works

Other services
client:25576sauterdongleresponse client:25576sauterdongleresponse

The client sends a request to port 25576 and the sauterdongle 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)
01 Security

Is port 25576 dangerous?

We have no specific security note for port 25576. 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 25576

ServicePortTransportDescriptionReferenceUpdated
sauterdongle 25576 TCP Sauter Dongle - 2010-12-15
-25576-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 25576, and is it reachable?

Linux

sudo ss -ltnup 'sport = :25576'      # process listening on 25576
sudo lsof -nP -i :25576

macOS

sudo lsof -nP -i :25576

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 25576 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 25576
netstat -ano | findstr :25576

From another machine

nmap -p 25576 -sV <host>
nc -zv <host> 25576

Block it in the firewall

sudo ufw deny 25576/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 25576" -Direction Inbound -LocalPort 25576 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 25576 used for?

Port 25576 is assigned by IANA to sauterdongle (Sauter Dongle).

Is port 25576 TCP or UDP?

Port 25576 is registered for TCP.

Is it safe to open port 25576?

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 25576 is open?

On Linux run "ss -ltnup 'sport = :25576'", on macOS "lsof -nP -i :25576", and on Windows "netstat -ano | findstr :25576" to see the local process. From another machine, "nmap -p 25576 <host>" shows whether it is reachable.

05 Related

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