Port 4740IPFIX over TLS

IPFIX over TLS carries network-flow telemetry securely from exporters to collectors.

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

also known as ipfixs, IPFIX-TLS

Technical Details

what runs on :4740

IPFIX over TLS carries IPFIX messages from an exporter to a collector, with a TLS handshake before the message stream. IPFIX messages contain template and data sets; collectors use templates to interpret the exported records. The corresponding commonly used cleartext IPFIX port is 4739. IANA lists this service for TCP, UDP, and SCTP; ordinary TLS is stream-oriented, so UDP use requires an appropriate datagram-secure transport rather than plain TLS over a UDP socket.

Security Information

exposure of :4740

risk score

4/ 10caution

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

security averages 3.1 across 381 ports — this one sits 0.9 above.

in transit

encrypted

payloads are protected on the wire

assignment

official

registered with iana for this service — scanners fingerprint it by number

reachable over

tcp · udp · sctp

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

security overview

Flow records can reveal communication patterns and other sensitive network metadata. TLS protects the connection in normal use, but peer authentication depends on the deployment’s certificate and policy configuration; restrict access to known exporters and collectors, and avoid exposing the collector broadly to the internet.

Record

iana registry entry

port: :4740
service: IPFIX over TLS
transport: TCPUDPSCTP
encryption: tls / encrypted
assignment: iana registered
risk: 4/10caution
category: Security Network Services
usage: IPFIX exporters send flow records to collectors used by network monitoring and traffic-analysis systems. Port 4740 is the secure IPFIX assignment; engineers are more likely to encounter it on a collector inside a managed network than on a public-facing host.
lookups: 0rank 993
added: 2026-10-05
updated: 2026-10-05
references: IANA service name registry — port 4740

Something wrong?

This record is maintained by the engineers who use port 4740. 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 2026-10-05.

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

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risk mix of the 8 listed

caution100%

2 of 8 encrypted

Port :4740IPFIX over TLS

Technical Details

Security Information

Related Ports

Port 4740IPFIX over TLS