CyberHunter
Local dataset, no network
// Other services

Port 344: Prospero Data Access Protocol

Port 344 is assigned by IANA to pdap (Prospero Data Access Protocol).

344

How pdap works

Other services
client:344pdapresponse client:344pdapresponse

The client sends a request to port 344 and the pdap 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
Well-known (0-1023)
Category
Other services
01 Security

Is port 344 dangerous?

We have no specific security note for port 344. 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 344

ServicePortTransportDescriptionReferenceUpdated
pdap 344 TCP, UDP Prospero Data Access Protocol - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 344, and is it reachable?

Linux

sudo ss -ltnup 'sport = :344'      # process listening on 344
sudo lsof -nP -i :344

macOS

sudo lsof -nP -i :344

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 344 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 344
netstat -ano | findstr :344

From another machine

nmap -p 344 -sV <host>
sudo nmap -sU -p 344 <host>
nc -zv <host> 344

Block it in the firewall

sudo ufw deny 344/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 344" -Direction Inbound -LocalPort 344 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 344 used for?

Port 344 is assigned by IANA to pdap (Prospero Data Access Protocol).

Is port 344 TCP or UDP?

Port 344 is registered for TCP and UDP.

Is it safe to open port 344?

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 344 is open?

On Linux run "ss -ltnup 'sport = :344'", on macOS "lsof -nP -i :344", and on Windows "netstat -ano | findstr :344" to see the local process. From another machine, "nmap -p 344 <host>" shows whether it is reachable.

05 Related
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