Port 4304One-Wire Filesystem Server

OWFS server access to a 1-Wire bus, letting clients read and manage connected devices.

transport: tcp · udp
in transit: cleartext
assignment: official
risk: 6/10
lookups: 0

also known as owserver, OWFS, One-Wire Server

Technical Details

what runs on :4304

owserver is the network backend in OWFS: clients send requests to access 1-Wire devices through filesystem-like paths, and the daemon returns device data or performs requested operations. TCP port 4304 is the customary default for OWFS server connections; the registry also lists UDP. The OWServer protocol is a project-specific request/response protocol, not a general file-sharing protocol, and traffic is not encrypted by default.

Security Information

exposure of :4304

risk score

6/ 10risk

treat as sensitive. widely scanned and regularly exploited when reachable — restrict it to known sources.

network services averages 2.6 across 1,515 ports — this one sits 3.4 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

Do not expose this service directly to the internet. Network clients may be able to read sensor data and, where writes are allowed, interact with devices on the 1-Wire bus; the protocol does not provide encryption, so restrict access to trusted networks and use firewall rules or a secure tunnel.

Record

iana registry entry

port: :4304
service: One-Wire Filesystem Server
transport: TCPUDP
encryption: cleartext
assignment: iana registered
risk: 6/10risk
category: Network Services IoT
usage: This is the network service for OWFS, the One-Wire Filesystem project, whose assignment is registered to Paul Alfille. It lets OWFS clients and related tools access devices such as temperature sensors through an `owserver` daemon.
lookups: 0rank 993
added: 2026-10-04
updated: 2026-10-04
references: IANA service name registry — port 4304

Something wrong?

This record is maintained by the engineers who use port 4304. 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 2026-10-04.

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%

0 of 8 encrypted

Port :4304One-Wire Filesystem Server

Technical Details

Security Information

Related Ports

Port 4304One-Wire Filesystem Server