Port 8266ESPEasy peer-to-peer communication

ESPEasy devices use UDP port 8266 to exchange peer-to-peer messages.

transport: udp
in transit: cleartext
assignment: official
risk: 3/10
lookups: 0

also known as espeasy-p2p

Technical Details

what runs on :8266

ESPEasy peer-to-peer communication uses UDP on port 8266. UDP is connectionless, so there is no TCP-style connection handshake; the application exchanges ESPEasy-specific messages between compatible devices. This is a product protocol rather than a general-purpose standard, and communication requires ESPEasy peers configured to use it. The IANA assignment is specifically for this service.

Security Information

exposure of :8266

risk score

3/ 10caution

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

iot averages 3.4 across 178 ports — this one sits 0.4 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

Traffic is not encrypted by default, so messages may be observable on the network path. Keep the service on a trusted LAN or IoT network rather than exposing it to the internet, and do not assume peer messages are authenticated; UDP traffic can also be spoofed.

Record

iana registry entry

port: :8266
service: ESPEasy peer-to-peer communication
transport: UDP
encryption: cleartext
assignment: iana registered
risk: 3/10caution
category: IoT
usage: This is ESPEasy firmware’s peer-to-peer communication service for compatible ESP-based devices. Engineers are most likely to encounter it on a local network when ESPEasy nodes are configured to exchange messages; it is not a general-purpose UDP service.
lookups: 0rank 993
added: 2026-10-14
updated: 2026-10-14
references: IANA service name registry — port 8266

Something wrong?

This record is maintained by the engineers who use port 8266. 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 2026-10-14.

01edit any field on a page of its own
02a model checks it for accuracy and spam
03clean and confident goes live immediately

edit this record →back to the registry

Related Ports

all 178 in iot →

the 8 most looked-up other ports in iot — 178 ports carry that label.

port	service	proto	category	risk	views
:6543	Jetnet	UDP	Network Services	caution	65.3k
:3233	WhiskerControl Protocol	TCPUDP	Network Services	caution	61.9k
:9600	Omron FINS Communication	UDP	Network Services	caution	33.2k
:4840	OPC UA TCP	TCPUDP	Network Services	caution	26.6k
:5678	Mikrotik MNDP	UDP	Network Services	caution	24.7k
:4843	OPC UA over TLS/SSL	TCPUDPtls	Security	caution	24.6k
:5001	Slingbox	TCP	Streaming	caution	22.4k
:15000	Hypack Data Acquisition	TCP	Network Services	caution	21.4k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :8266ESPEasy peer-to-peer communication

Technical Details

Security Information

Related Ports

Port 8266ESPEasy peer-to-peer communication