Port 344Prospero Data Access Protocol

Port 344 is assigned to the Prospero Data Access Protocol for Prospero data access services.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as pdap

Technical Details

what runs on :344

The assignment covers both TCP and UDP. Prospero separates directory service, commonly associated with port 1525, from data access; clients use Prospero requests to retrieve or operate on resources named by directory entries. This is a legacy request/response protocol rather than HTTP or FTP, and it does not provide modern TLS encryption by default.

Security Information

exposure of :344

risk score

2/ 10safe

routine exposure. this port is rarely the way in on its own — keep it patched and logged and move on.

file transfer averages 3.4 across 185 ports — this one sits 1.4 below.

in transit

cleartext

credentials and payloads are readable by anyone on path

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp

udp is connectionless — source addresses are trivially spoofed and it is a reflection favourite

security overview

Prospero traffic is normally cleartext, and an exposed server may reveal or provide access to resources permitted by its configuration. Because the protocol and implementations are obsolete and uncommon, it should generally be restricted to trusted networks rather than exposed to the Internet.

Record

iana registry entry

port: :344
service: Prospero Data Access Protocol
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: File Transfer Network Services
usage: Prospero was an early distributed directory and data-access system developed at USC/ISI; this port was assigned for its data-access protocol over TCP and UDP. It is now rarely encountered outside historical or specialized deployments.
lookups: 0rank 993
added: 2026-08-28
updated: 2026-09-22
references: IANA service name registry — port 344

Something wrong?

This record is maintained by the engineers who use port 344. Every field on it is editable — change what's wrong, say how you know, and a reviewer publishes it, usually within a minute. Last touched 2026-09-22.

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Related Ports

all 185 in file transfer →

the 8 most looked-up other ports in file transfer — 185 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:17500	Dropbox LAN Sync	TCPUDP	File Transfer	caution	43.7k
:548	Apple Filing Protocol	TCP	File Transfer	caution	36.8k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k
:1337	PowerFolder P2P	TCP	Security	caution	27.1k
:9001	SharePoint Authoring		Web Services	caution	26.3k
:8080	FilePhile Relay	UDP	File Transfer	caution	25.6k
:1337	WASTE Encrypted Sharing	TCP	Security	caution	22.9k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :344Prospero Data Access Protocol

Technical Details

Security Information

Related Ports

Port 344Prospero Data Access Protocol