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Local dataset, no network
// Other services

Port 18000: Beckman Instruments, Inc.

Port 18000 is assigned by IANA to biimenu (Beckman Instruments, Inc.).

18000

How biimenu works

Other services
client:18000biimenuresponse client:18000biimenuresponse

The client sends a request to port 18000 and the biimenu 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 18000 dangerous?

We have no specific security note for port 18000. 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 18000

ServicePortTransportDescriptionReferenceUpdated
biimenu 18000 TCP, UDP Beckman Instruments, Inc. - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 18000, and is it reachable?

Linux

sudo ss -ltnup 'sport = :18000'      # process listening on 18000
sudo lsof -nP -i :18000

macOS

sudo lsof -nP -i :18000

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 18000 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 18000
netstat -ano | findstr :18000

From another machine

nmap -p 18000 -sV <host>
sudo nmap -sU -p 18000 <host>
nc -zv <host> 18000

Block it in the firewall

sudo ufw deny 18000/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 18000" -Direction Inbound -LocalPort 18000 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 18000 used for?

Port 18000 is assigned by IANA to biimenu (Beckman Instruments, Inc.).

Is port 18000 TCP or UDP?

Port 18000 is registered for TCP and UDP.

Is it safe to open port 18000?

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 18000 is open?

On Linux run "ss -ltnup 'sport = :18000'", on macOS "lsof -nP -i :18000", and on Windows "netstat -ano | findstr :18000" to see the local process. From another machine, "nmap -p 18000 <host>" shows whether it is reachable.

05 Related
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