Port 11430Lenbrook Service Discovery Protocol

UDP discovery for finding Lenbrook network audio players, including BluOS and Bluesound devices, on a local network.

transport: udp
in transit: cleartext
assignment: official
risk: 2/10
lookups: 0

also known as lsdp, BluOS discovery

Technical Details

what runs on :11430

This is a proprietary UDP-based discovery service assigned to Lenbrook Industries. It is used by Lenbrook network audio devices and controllers to discover devices on a local network; the wire format and precise query/response behavior are not publicly standardized. It is a discovery endpoint, not the audio streaming or general device-control interface.

Security Information

exposure of :11430

risk score

2/ 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 1,888 ports — this one sits 0.6 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

udp

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

security overview

Discovery traffic may reveal the presence and identity of Lenbrook audio devices to hosts that can reach the service. It is intended for local-network use and should not be exposed directly to the internet; restrict it to trusted network segments. No specific security weakness is asserted here.

Record

iana registry entry

port: :11430
service: Lenbrook Service Discovery Protocol
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 2/10safe
category: Network Services Media
usage: Lenbrook network audio products, including BluOS/Bluesound players and some NAD equipment, use this UDP port for service discovery. Engineers are most likely to encounter it on a local network when a controller is locating audio players.
lookups: 0rank 993
added: 2026-10-17
updated: 2026-10-17
references: IANA service name registry — port 11430

Something wrong?

This record is maintained by the engineers who use port 11430. 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 2026-10-17.

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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 :11430Lenbrook Service Discovery Protocol

Technical Details

Security Information

Related Ports

Port 11430Lenbrook Service Discovery Protocol