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// Other services

Port 3151: NetMike Assessor

Port 3151 is assigned by IANA to nm-assessor (NetMike Assessor).

3151

How nm-assessor works

Other services
client:3151nm-assessorresponse client:3151nm-assessorresponse

The client sends a request to port 3151 and the nm-assessor 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 3151 dangerous?

We have no specific security note for port 3151. 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 3151

ServicePortTransportDescriptionReferenceUpdated
nm-assessor 3151 TCP, UDP NetMike Assessor - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3151, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3151'      # process listening on 3151
sudo lsof -nP -i :3151

macOS

sudo lsof -nP -i :3151

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3151 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3151
netstat -ano | findstr :3151

From another machine

nmap -p 3151 -sV <host>
sudo nmap -sU -p 3151 <host>
nc -zv <host> 3151

Block it in the firewall

sudo ufw deny 3151/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3151" -Direction Inbound -LocalPort 3151 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3151 used for?

Port 3151 is assigned by IANA to nm-assessor (NetMike Assessor).

Is port 3151 TCP or UDP?

Port 3151 is registered for TCP and UDP.

Is it safe to open port 3151?

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 3151 is open?

On Linux run "ss -ltnup 'sport = :3151'", on macOS "lsof -nP -i :3151", and on Windows "netstat -ano | findstr :3151" to see the local process. From another machine, "nmap -p 3151 <host>" shows whether it is reachable.

05 Related
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