Port 4170SMPTE Content Synchronization Protocol

TCP port 4170 is assigned to SMPTE's digital-cinema content synchronization protocol.

transport: tcp
in transit: cleartext
assignment: official
risk: 1/10
lookups: 0

also known as d-cinema-csp, CSP

Technical Details

what runs on :4170

The IANA assignment is TCP port 4170 for the SMPTE Content Synchronization Protocol (CSP), a protocol for content synchronization in digital cinema. It is intended for use among cinema systems, not as a general-purpose listener. The assignment identifies TCP as the transport; I cannot confidently specify its message framing, handshake, or encryption behavior.

Security Information

exposure of :4170

risk score

1/ 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 1,505 ports — this one sits 1.6 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

every listening transport is another surface to filter at the edge

security overview

This is a specialized cinema-network protocol, and internet-wide scan data has not shown it open. It should generally remain confined to the trusted network connecting cinema equipment; there is not enough information here to claim that the protocol provides authentication or encryption.

Record

iana registry entry

port: :4170
service: SMPTE Content Synchronization Protocol
transport: TCP
encryption: cleartext
assignment: iana registered
risk: 1/10safe
category: Network Services Media
usage: This port is assigned to the SMPTE Content Synchronization Protocol for digital-cinema systems. An engineer is most likely to encounter it on a cinema network between equipment involved in content synchronization, rather than as a general-purpose internet service.
lookups: 0rank 993
added: 2026-10-03
updated: 2026-10-03
references: IANA service name registry — port 4170

Something wrong?

This record is maintained by the engineers who use port 4170. 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 2026-10-03.

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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

0 of 8 encrypted

Port :4170SMPTE Content Synchronization Protocol

Technical Details

Security Information

Related Ports

Port 4170SMPTE Content Synchronization Protocol