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Local dataset, no network
// Other services

Port 3537: Remote NI-VISA port

Port 3537 is assigned by IANA to ni-visa-remote (Remote NI-VISA port).

3537

How ni-visa-remote works

Other services
client:3537ni-visa-remoteresponse client:3537ni-visa-remoteresponse

The client sends a request to port 3537 and the ni-visa-remote 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 3537 dangerous?

We have no specific security note for port 3537. 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 3537

ServicePortTransportDescriptionReferenceUpdated
ni-visa-remote 3537 TCP, UDP Remote NI-VISA port - 2002-07

// source: IANA service name and port number registry

03 Check it

Which program uses port 3537, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3537'      # process listening on 3537
sudo lsof -nP -i :3537

macOS

sudo lsof -nP -i :3537

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3537 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3537
netstat -ano | findstr :3537

From another machine

nmap -p 3537 -sV <host>
sudo nmap -sU -p 3537 <host>
nc -zv <host> 3537

Block it in the firewall

sudo ufw deny 3537/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3537" -Direction Inbound -LocalPort 3537 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3537 used for?

Port 3537 is assigned by IANA to ni-visa-remote (Remote NI-VISA port).

Is port 3537 TCP or UDP?

Port 3537 is registered for TCP and UDP.

Is it safe to open port 3537?

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 3537 is open?

On Linux run "ss -ltnup 'sport = :3537'", on macOS "lsof -nP -i :3537", and on Windows "netstat -ano | findstr :3537" to see the local process. From another machine, "nmap -p 3537 <host>" shows whether it is reachable.

05 Related
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