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// Other services

Port 3561: BMC-OneKey

Port 3561 is assigned by IANA to bmc-onekey (BMC-OneKey).

3561

How bmc-onekey works

Other services
client:3561bmc-onekeyresponse client:3561bmc-onekeyresponse

The client sends a request to port 3561 and the bmc-onekey 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 3561 dangerous?

We have no specific security note for port 3561. 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 3561

ServicePortTransportDescriptionReferenceUpdated
bmc-onekey 3561 TCP, UDP BMC-OneKey - 2002-08

// source: IANA service name and port number registry

03 Check it

Which program uses port 3561, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3561'      # process listening on 3561
sudo lsof -nP -i :3561

macOS

sudo lsof -nP -i :3561

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3561 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3561
netstat -ano | findstr :3561

From another machine

nmap -p 3561 -sV <host>
sudo nmap -sU -p 3561 <host>
nc -zv <host> 3561

Block it in the firewall

sudo ufw deny 3561/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3561" -Direction Inbound -LocalPort 3561 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3561 used for?

Port 3561 is assigned by IANA to bmc-onekey (BMC-OneKey).

Is port 3561 TCP or UDP?

Port 3561 is registered for TCP and UDP.

Is it safe to open port 3561?

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 3561 is open?

On Linux run "ss -ltnup 'sport = :3561'", on macOS "lsof -nP -i :3561", and on Windows "netstat -ano | findstr :3561" to see the local process. From another machine, "nmap -p 3561 <host>" shows whether it is reachable.

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