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// Other services

Port 30000: Secure Network Data Management Protocol

Port 30000 is assigned by IANA to ndmps (Secure Network Data Management Protocol).

30000

How ndmps works

Other services
client:30000ndmpsresponse client:30000ndmpsresponse

The client sends a request to port 30000 and the ndmps 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)
Category
Other services
01 Security

Is port 30000 dangerous?

We have no specific security note for port 30000. 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 30000

ServicePortTransportDescriptionReferenceUpdated
ndmps 30000 TCP Secure Network Data Management Protocol - 2013-02-05
-30000-Reserved--

// source: IANA service name and port number registry

03 Check it

Which program uses port 30000, and is it reachable?

Linux

sudo ss -ltnup 'sport = :30000'      # process listening on 30000
sudo lsof -nP -i :30000

macOS

sudo lsof -nP -i :30000

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 30000 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 30000
netstat -ano | findstr :30000

From another machine

nmap -p 30000 -sV <host>
nc -zv <host> 30000

Block it in the firewall

sudo ufw deny 30000/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 30000" -Direction Inbound -LocalPort 30000 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 30000 used for?

Port 30000 is assigned by IANA to ndmps (Secure Network Data Management Protocol).

Is port 30000 TCP or UDP?

Port 30000 is registered for TCP.

Is it safe to open port 30000?

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 30000 is open?

On Linux run "ss -ltnup 'sport = :30000'", on macOS "lsof -nP -i :30000", and on Windows "netstat -ano | findstr :30000" to see the local process. From another machine, "nmap -p 30000 <host>" shows whether it is reachable.

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