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// Other services

Port 2184: NVD User

Port 2184 is assigned by IANA to nvd (NVD User).

2184

How nvd works

Other services
client:2184nvdresponse client:2184nvdresponse

The client sends a request to port 2184 and the nvd 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 2184 dangerous?

We have no specific security note for port 2184. 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 2184

ServicePortTransportDescriptionReferenceUpdated
nvd 2184 TCP, UDP NVD User - 2004-12

// source: IANA service name and port number registry

03 Check it

Which program uses port 2184, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2184'      # process listening on 2184
sudo lsof -nP -i :2184

macOS

sudo lsof -nP -i :2184

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2184 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2184
netstat -ano | findstr :2184

From another machine

nmap -p 2184 -sV <host>
sudo nmap -sU -p 2184 <host>
nc -zv <host> 2184

Block it in the firewall

sudo ufw deny 2184/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2184" -Direction Inbound -LocalPort 2184 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2184 used for?

Port 2184 is assigned by IANA to nvd (NVD User).

Is port 2184 TCP or UDP?

Port 2184 is registered for TCP and UDP.

Is it safe to open port 2184?

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 2184 is open?

On Linux run "ss -ltnup 'sport = :2184'", on macOS "lsof -nP -i :2184", and on Windows "netstat -ano | findstr :2184" to see the local process. From another machine, "nmap -p 2184 <host>" shows whether it is reachable.

05 Related
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