Port 3804Harman HiQnet / IQNet

Harman IQNet/HiQnet carries control and monitoring traffic for networked Harman professional-audio equipment.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 5/10
lookups: 0

also known as iqnet-port

Technical Details

what runs on :3804

Harman's proprietary audio-network protocol is associated with TCP and UDP port 3804. It carries device control and monitoring traffic; UDP is also used for device discovery in typical HiQnet deployments. The messages are vendor-specific rather than HTTP, and the precise behavior can vary by device and software version. The IANA assignment calls this the Harman IQNet Port; HiQnet is the name commonly encountered in Harman's professional-audio product ecosystem.

Security Information

exposure of :3804

risk score

5/ 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 1,452 ports — this one sits 2.3 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 · udp

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

security overview

This is control-plane traffic for audio equipment, not a service that should normally be reachable from the public internet. Treat it as unencrypted and restrict TCP/UDP 3804 to trusted AV-control networks; exposure could give an attacker access to device-management functions, depending on the equipment and its configuration.

Record

iana registry entry

port: :3804
service: Harman HiQnet / IQNet
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 5/10caution
category: Network Services Media
usage: This port is associated with Harman's IQNet/HiQnet ecosystem for controlling and monitoring networked professional-audio equipment, such as amplifiers and signal processors. Engineers are most likely to encounter it on an AV control network rather than on a general-purpose server.
lookups: 0rank 993
added: 2026-10-02
updated: 2026-10-02
references: IANA service name registry — port 3804

Something wrong?

This record is maintained by the engineers who use port 3804. 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 2026-10-02.

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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all 1,452 in network services →

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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 :3804Harman HiQnet / IQNet

Technical Details

Security Information

Related Ports

Port 3804Harman HiQnet / IQNet