Port 1403Prospero Resource Manager

Port 1403 is assigned to the Prospero Resource Manager service over TCP and UDP.

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

also known as prm-nm-np

Technical Details

what runs on :1403

Prospero uses both TCP and UDP for client/server resource-management and directory operations. The protocol is an old request/response service for locating and managing distributed resources; exact framing, startup behavior, and implementation defaults depend on the Prospero server, and the IANA registration does not specify a more detailed wire format or related ports.

Security Information

exposure of :1403

risk score

2/ 10safe

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

network services averages 2.6 across 1,625 ports — this one sits 0.6 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Prospero is obsolete and should not normally be exposed to the public Internet. Traffic is not encrypted by default, and an exposed legacy implementation may disclose resource metadata or provide operations intended for trusted clients; restrict it to known networks and disable it where unused.

Record

iana registry entry

port: :1403
service: Prospero Resource Manager
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services System
usage: This port is assigned to Prospero, a legacy distributed resource-management and directory service associated with B. Clifford Neuman. It is rarely encountered today and is most likely to appear on an older Prospero server or research installation.
lookups: 0rank 993
added: 2026-08-27
updated: 2026-09-22
references: IANA service name registry — port 1403

Something wrong?

This record is maintained by the engineers who use port 1403. 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.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

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all 1,625 in network services →

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:3268	Microsoft Global Catalog (GC)	TCPUDP	Security	caution	54.6k
:135	Microsoft EPMAP	TCPUDP	Security	caution	51.9k
:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :1403Prospero Resource Manager

Technical Details

Security Information

Related Ports

Port 1403Prospero Resource Manager