Port 22000Syncthing

Port 22000 is Syncthing’s encrypted peer-to-peer file synchronization port, using TCP or QUIC over UDP.

transport: tcp · udp
in transit: encrypted
assignment: official
risk: 3/10
lookups: 0

also known as snapenetio

Technical Details

what runs on :22000

Syncthing normally listens on TCP port 22000 for its custom block-exchange protocol over TLS, and can also listen on UDP 22000 using QUIC. Devices identify and authenticate one another using certificate-based device identities; the encrypted connection carries synchronization messages and file blocks. Syncthing’s local discovery typically uses UDP 21027, while global discovery uses a separate HTTPS service. This common use is distinct from the IANA SNAPenetIO assignment.

Security Information

exposure of :22000

risk score

3/ 10caution

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

file transfer averages 3.3 across 211 ports — this one sits 0.3 below.

in transit

encrypted

payloads are protected on the wire

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

Syncthing encrypts connections and requires a peer to be accepted as a device before it can synchronize folders, so an open listener does not by itself grant access to shared files. Expose it only when remote device connectivity is needed, keep Syncthing updated, and review trusted devices and folder permissions: an authorized or compromised peer may receive or alter shared data.

Record

iana registry entry

port: :22000
service: Syncthing
transport: TCPUDP
encryption: tls / encrypted
assignment: iana registered
risk: 3/10caution
category: File Transfer
usage: The IANA assignment is SNAPenetIO, registered to Kevin Kuhns, but port 22000 is widely used by Syncthing for device-to-device file synchronization. Engineers commonly encounter it on systems sharing files with Syncthing; its default listener supports TCP and, in current versions, QUIC over UDP.
lookups: 0rank 993
added: 2026-10-18
updated: 2026-10-18
references: IANA service name registry — port 22000

Something wrong?

This record is maintained by the engineers who use port 22000. 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 2026-10-18.

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 211 in file transfer →

the 8 most looked-up other ports in file transfer — 211 ports carry that label.

port	service	proto	category	risk	views
:9080	Groove RPC	TCPUDP	Web Services	caution	70.8k
:17500	Dropbox LAN Sync	TCPUDP	File Transfer	caution	43.7k
:548	Apple Filing Protocol	TCP	File Transfer	caution	36.8k
:7000	Vuze HTTPS Tracker	TCPtls	Security	caution	28.9k
:1337	PowerFolder P2P	TCP	Security	caution	27.1k
:9001	SharePoint Authoring		Web Services	caution	26.3k
:8080	FilePhile Relay	UDP	File Transfer	caution	25.6k
:1337	WASTE Encrypted Sharing	TCP	Security	caution	22.9k

risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :22000Syncthing

Technical Details

Security Information

Related Ports

Port 22000Syncthing