CyberHunter
Local dataset, no network
// Other services

Port 2947: GPS Daemon request/response protocol

Port 2947 is assigned by IANA to gpsd (GPS Daemon request/response protocol).

2947

How gpsd works

Other services
client:2947gpsdresponse client:2947gpsdresponse

The client sends a request to port 2947 and the gpsd 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 2947 dangerous?

We have no specific security note for port 2947. 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 2947

ServicePortTransportDescriptionReferenceUpdated
gpsd 2947 TCP, UDP GPS Daemon request/response protocol - 2010-04-19

// source: IANA service name and port number registry

03 Check it

Which program uses port 2947, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2947'      # process listening on 2947
sudo lsof -nP -i :2947

macOS

sudo lsof -nP -i :2947

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2947 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2947
netstat -ano | findstr :2947

From another machine

nmap -p 2947 -sV <host>
sudo nmap -sU -p 2947 <host>
nc -zv <host> 2947

Block it in the firewall

sudo ufw deny 2947/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2947" -Direction Inbound -LocalPort 2947 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2947 used for?

Port 2947 is assigned by IANA to gpsd (GPS Daemon request/response protocol).

Is port 2947 TCP or UDP?

Port 2947 is registered for TCP and UDP.

Is it safe to open port 2947?

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 2947 is open?

On Linux run "ss -ltnup 'sport = :2947'", on macOS "lsof -nP -i :2947", and on Windows "netstat -ano | findstr :2947" to see the local process. From another machine, "nmap -p 2947 <host>" shows whether it is reachable.

05 Related
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