HiQnet
HiQnet is HARMAN Professional's proprietary IP control, monitoring, discovery, and system-management protocol family for compatible HARMAN audio/control devices and software. For firewall work, the live control/discovery baseline is TCP/UDP 3804, registered by IANA as iqnet-port / Harman IQNet Port. That baseline is not the whole maintenance workflow: Soundweb London configuration transfer, firmware loading, event-log transfer, London DI, Telnet, and some amplifier firmware workflows use adjacent services that must be scheduled separately when they are in scope. HiQnet is not media transport, not Dante/BLU link/AES67, not a vendor-neutral open API, and not a cloud-management security boundary. Current HARMAN Audio Architect material also separates the classic HiQnet estate from newer Soundweb Omni / AVX / HControl workflows, so do not reuse a HiQnet firewall rule for newer HARMAN control paths without explicit product-family documentation.
Scope: HiQnet IP control; separately selected Soundweb London and Crown DCi services
protocol · Catalog reviewed 2026-09-27
Infrastructure Requirements
- Compatible HARMAN HiQnet devices/software
- TCP and UDP 3804
- sane Layer 2 broadcast behavior for ordinary discovery
- static routes or Crown proxying if discovery/control must cross routed boundaries
- fixed IP addressing on remote segments
- and a separate media-network design for actual audio transport because HiQnet is not the signal path
Network & Physical Requirements
| Port / allocation | Transport | Connection / signal flow | Feature and requirement | Evidence |
|---|---|---|---|---|
| 23 (default) | TCP | Maintenance client → Crown DCi Network / Dante amplifier | Optional · Crown DCi maintenance Telnet maintenance Crown DCi Network and DCi Dante | Source checked 2026-09-27 Configuration and Control; port enable/disable settings |
| 3804 (default) | TCP | HiQnet participant → HiQnet peer | Profile requirement · HiQnet HiQnet reliable control HiQnet IP packet service | Source checked 2026-09-27 Packet Service Layers; TCP/IP use cases24 July 2026 |
| 3804 (default) | UDP | HiQnet participant → HiQnet peer | Profile requirement · HiQnet HiQnet discovery and datagrams HiQnet IP packet service | Source checked 2026-09-27 Packet Service Layers; TCP/IP use cases24 July 2026 |
| 21 (default) | TCP | Management / control client → Soundweb London device | Optional · Soundweb London maintenance FTP control Soundweb London | Source checked 2026-09-27 HiQnet Ethernet Portsv1.0, 16 April 2020 |
| 49152–50152 | TCP | Management / control client → Soundweb London device | Optional · Soundweb London maintenance FTP data connections Soundweb London FTP data starts at 49152 for one online PC; additional clients use further ports within the documented range. | Source checked 2026-09-27 HiQnet Ethernet Portsv1.0, 16 April 2020 |
| 1023 (default) | TCP | Management / control client → Soundweb London device | Optional · London DI London DI control Soundweb London | Source checked 2026-09-27 HiQnet Ethernet Portsv1.0, 16 April 2020 |
| 69 (default) | UDP | Maintenance client → Crown DCi Network / Dante amplifier | Optional · Crown DCi maintenance TFTP firmware transfer Crown DCi Network and DCi Dante | Source checked 2026-09-27 Configuration and Control; port enable/disable settings |
| 23 | TCP | Maintenance workstation → Soundweb London | Optional · London maintenance Soundweb London Telnet Soundweb London | Source checked 2026-09-27 HiQnet Ethernet Ports |
| 5600 | TCP | IQ control client → Crown DCi amplifier | Optional · Crown IQ control TCP/IQ control Crown DCi Network / DCi Dante Protocol can be disabled; changing the state variable takes effect after reboot. | Source checked 2026-09-27 Configuration and Control – DCi Network and DCi Dante amplifiers |
Gotchas & IT Notes
- ⚠Native HiQnet uses TCP and UDP 3804. Maintenance services are product-specific and optional.
- ⚠London DI on TCP 1023 is a separate Soundweb London control interface.
- ⚠Firmware and configuration transfers require their own service selection; do not infer that every HiQnet product exposes FTP, Telnet or TFTP.