Port 8471PIM over Reliable Transport

Carries Protocol Independent Multicast control traffic over reliable TCP or SCTP transport.

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

also known as pim-port

Technical Details

what runs on :8471

PIM over Reliable Transport carries PIM control messages over TCP or SCTP, using the transport protocol's connection establishment and reliable, ordered delivery rather than PIM's native IP protocol 103 delivery. It is distinct from ordinary PIM-SM or PIM-DM traffic, which normally uses IP protocol 103 and has no TCP/UDP port; the registered port is 8471 for both TCP and SCTP. The transport provides reliability, but this service does not imply encryption.

Security Information

exposure of :8471

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 2.7 across 1,380 ports — this one sits 1.3 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 · sctp

every listening transport is another surface to filter at the edge

security overview

This port should generally be restricted to trusted multicast-routing peers rather than exposed to the Internet. An attacker able to connect may consume router resources or inject, disrupt, or influence PIM control traffic; filtering and the implementation's peer authentication controls are important because the transport itself is not encrypted by default.

Record

iana registry entry

port: :8471
service: PIM over Reliable Transport
transport: TCPSCTP
encryption: cleartext
assignment: iana registered
risk: 4/10caution
category: Network Services
usage: This port is used by multicast-routing implementations that transport PIM control traffic over a reliable stream instead of native PIM packets. It is uncommon on the public Internet and is mainly encountered between routers or multicast control-plane peers.
lookups: 0rank 993
added: 2026-09-07
updated: 2026-09-22
references: IANA service name registry — port 8471
RFC 6559

Something wrong?

This record is maintained by the engineers who use port 8471. 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
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edit this record →back to the registry

Related Ports

all 1,380 in network services →

the 8 most looked-up other ports in network services — 1,380 ports carry that label.

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:3128	Tatsoft Default HTTP Proxy	TCP	Web Services	caution	46.8k

risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :8471PIM over Reliable Transport

Technical Details

Security Information

Related Ports

Port 8471PIM over Reliable Transport