Port 44321Performance Co-Pilot (PCP) pmcd

PCP's pmcd serves host performance metrics to remote monitoring clients, normally over TCP port 44321.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 4/10
lookups: 0

also known as PCP

Technical Details

what runs on :44321

pmcd is the central server in PCP's monitoring architecture: it accepts client requests and obtains metric data from Performance Metrics Domain Agents (PMDAs). PCP exchanges binary, length-framed protocol data over a TCP connection; IANA lists both TCP and UDP for this assignment, but TCP is the normal transport for pmcd clients. The standard port is 44321. Traffic is not encrypted by default, though deployments can use supported security features or protected network tunnels.

Security Information

exposure of :44321

risk score

4/ 10caution

worth attention. how exposed you are depends on configuration — don't leave it reachable from the internet without a reason.

network services averages 2.6 across 2,017 ports — this one sits 1.4 above.

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

An exposed pmcd can disclose host performance and configuration information, potentially including details useful for profiling a system. Keep it reachable only by trusted monitoring clients and apply the deployment's access controls; do not assume the default connection is encrypted.

Record

iana registry entry

port: :44321
service: Performance Co-Pilot (PCP) pmcd
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 4/10caution
category: Network Services System
usage: This is the default port for the Performance Co-Pilot Metrics Collector Daemon (pmcd), which makes metrics from local monitoring agents available to PCP tools and remote collectors. Engineers are most likely to encounter it on Linux or Unix hosts configured for PCP monitoring.
lookups: 0rank 993
added: 2026-10-21
updated: 2026-10-21
references: IANA service name registry — port 44321

Something wrong?

This record is maintained by the engineers who use port 44321. 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 2026-10-21.

01edit any field on a page of its own
02a model checks it for accuracy and spam
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edit this record →back to the registry

Related Ports

all 2,017 in network services →

the 8 most looked-up other ports in network services — 2,017 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:6543	Jetnet	UDP	Network Services	caution	65.3k
:5938	TeamViewer	TCPUDP	Remote Access	caution	65.0k
:8291	Winbox MikroTik Admin	TCP	Security	caution	62.9k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
: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 :44321Performance Co-Pilot (PCP) pmcd

Technical Details

Security Information

Related Ports

Port 44321Performance Co-Pilot (PCP) pmcd