CyberHunter
Local dataset, no network
// Other services

Port 48000: Nimbus Controller

Port 48000 is assigned by IANA to nimcontroller (Nimbus Controller).

48000

How nimcontroller works

Other services
client:48000nimcontrollerresponse client:48000nimcontrollerresponse

The client sends a request to port 48000 and the nimcontroller 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 48000 dangerous?

We have no specific security note for port 48000. 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 48000

ServicePortTransportDescriptionReferenceUpdated
nimcontroller 48000 TCP, UDP Nimbus Controller - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 48000, and is it reachable?

Linux

sudo ss -ltnup 'sport = :48000'      # process listening on 48000
sudo lsof -nP -i :48000

macOS

sudo lsof -nP -i :48000

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 48000 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 48000
netstat -ano | findstr :48000

From another machine

nmap -p 48000 -sV <host>
sudo nmap -sU -p 48000 <host>
nc -zv <host> 48000

Block it in the firewall

sudo ufw deny 48000/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 48000" -Direction Inbound -LocalPort 48000 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 48000 used for?

Port 48000 is assigned by IANA to nimcontroller (Nimbus Controller).

Is port 48000 TCP or UDP?

Port 48000 is registered for TCP and UDP.

Is it safe to open port 48000?

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 48000 is open?

On Linux run "ss -ltnup 'sport = :48000'", on macOS "lsof -nP -i :48000", and on Windows "netstat -ano | findstr :48000" to see the local process. From another machine, "nmap -p 48000 <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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