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// Other services

Port 3212: Survey Instrument

Port 3212 is assigned by IANA to surveyinst (Survey Instrument).

3212

How surveyinst works

Other services
client:3212surveyinstresponse client:3212surveyinstresponse

The client sends a request to port 3212 and the surveyinst 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 3212 dangerous?

We have no specific security note for port 3212. 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 3212

ServicePortTransportDescriptionReferenceUpdated
surveyinst 3212 TCP, UDP Survey Instrument - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3212, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3212'      # process listening on 3212
sudo lsof -nP -i :3212

macOS

sudo lsof -nP -i :3212

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3212 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3212
netstat -ano | findstr :3212

From another machine

nmap -p 3212 -sV <host>
sudo nmap -sU -p 3212 <host>
nc -zv <host> 3212

Block it in the firewall

sudo ufw deny 3212/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3212" -Direction Inbound -LocalPort 3212 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3212 used for?

Port 3212 is assigned by IANA to surveyinst (Survey Instrument).

Is port 3212 TCP or UDP?

Port 3212 is registered for TCP and UDP.

Is it safe to open port 3212?

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 3212 is open?

On Linux run "ss -ltnup 'sport = :3212'", on macOS "lsof -nP -i :3212", and on Windows "netstat -ano | findstr :3212" to see the local process. From another machine, "nmap -p 3212 <host>" shows whether it is reachable.

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