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// Other services

Port 4150: PowerAlert Network Shutdown Agent

Port 4150 is assigned by IANA to PowerAlert-nsa (PowerAlert Network Shutdown Agent).

4150

How PowerAlert-nsa works

Other services
client:4150PowerAlert-nsaresponse client:4150PowerAlert-nsaresponse

The client sends a request to port 4150 and the PowerAlert-nsa 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 4150 dangerous?

We have no specific security note for port 4150. 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 4150

ServicePortTransportDescriptionReferenceUpdated
PowerAlert-nsa 4150 TCP, UDP PowerAlert Network Shutdown Agent - 2007-07-02

// source: IANA service name and port number registry

03 Check it

Which program uses port 4150, and is it reachable?

Linux

sudo ss -ltnup 'sport = :4150'      # process listening on 4150
sudo lsof -nP -i :4150

macOS

sudo lsof -nP -i :4150

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 4150 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 4150
netstat -ano | findstr :4150

From another machine

nmap -p 4150 -sV <host>
sudo nmap -sU -p 4150 <host>
nc -zv <host> 4150

Block it in the firewall

sudo ufw deny 4150/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 4150" -Direction Inbound -LocalPort 4150 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 4150 used for?

Port 4150 is assigned by IANA to PowerAlert-nsa (PowerAlert Network Shutdown Agent).

Is port 4150 TCP or UDP?

Port 4150 is registered for TCP and UDP.

Is it safe to open port 4150?

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 4150 is open?

On Linux run "ss -ltnup 'sport = :4150'", on macOS "lsof -nP -i :4150", and on Windows "netstat -ano | findstr :4150" to see the local process. From another machine, "nmap -p 4150 <host>" shows whether it is reachable.

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