CyberHunter
Local dataset, no network
// Other services

Port 3147: RFIO

Port 3147 is assigned by IANA to rfio (RFIO).

3147

How rfio works

Other services
client:3147rfioresponse client:3147rfioresponse

The client sends a request to port 3147 and the rfio 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 3147 dangerous?

We have no specific security note for port 3147. 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 3147

ServicePortTransportDescriptionReferenceUpdated
rfio 3147 TCP, UDP RFIO - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 3147, and is it reachable?

Linux

sudo ss -ltnup 'sport = :3147'      # process listening on 3147
sudo lsof -nP -i :3147

macOS

sudo lsof -nP -i :3147

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 3147 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 3147
netstat -ano | findstr :3147

From another machine

nmap -p 3147 -sV <host>
sudo nmap -sU -p 3147 <host>
nc -zv <host> 3147

Block it in the firewall

sudo ufw deny 3147/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 3147" -Direction Inbound -LocalPort 3147 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 3147 used for?

Port 3147 is assigned by IANA to rfio (RFIO).

Is port 3147 TCP or UDP?

Port 3147 is registered for TCP and UDP.

Is it safe to open port 3147?

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 3147 is open?

On Linux run "ss -ltnup 'sport = :3147'", on macOS "lsof -nP -i :3147", and on Windows "netstat -ano | findstr :3147" to see the local process. From another machine, "nmap -p 3147 <host>" shows whether it is reachable.

05 Related
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