Port 5350Port Control Protocol (PCP) Multicast

UDP port 5350 is reserved for multicast Port Control Protocol traffic, used for PCP communication on local networks.

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

also known as pcp-multicast, PCP

Technical Details

what runs on :5350

PCP multicast uses UDP port 5350; ordinary PCP client-to-server exchanges use UDP port 5351. PCP messages have a binary format with a version and opcode, and can carry operations such as MAP requests to create or renew a mapping. Multicast use is for PCP communication on a local network, not a general-purpose internet-facing service. PCP traffic is not encrypted by default.

Security Information

exposure of :5350

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 1,637 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

udp

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

security overview

A reachable PCP service can allow clients to request NAT or firewall mappings, potentially making internal services reachable from outside. PCP is generally a local-network control protocol and should not be exposed to untrusted networks; restrict it to trusted interfaces and clients.

Record

iana registry entry

port: :5350
service: Port Control Protocol (PCP) Multicast
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services
usage: This is the IETF-defined multicast port for Port Control Protocol (PCP), a protocol that lets hosts request control of NAT or firewall mappings. Engineers are more likely to encounter ordinary unicast PCP on UDP 5351; UDP 5350 is intended for multicast PCP traffic rather than a typical public-internet service.
lookups: 0rank 993
added: 2026-10-07
updated: 2026-10-07
references: IANA service name registry — port 5350
RFC 6887

Something wrong?

This record is maintained by the engineers who use port 5350. 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 2026-10-07.

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edit this record →back to the registry

Related Ports

all 1,637 in network services →

the 8 most looked-up other ports in network services — 1,637 ports carry that label.

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:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
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: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 :5350Port Control Protocol (PCP) Multicast

Technical Details

Security Information

Related Ports

Port 5350Port Control Protocol (PCP) Multicast