Port 4186Box Backup Store Service

Box Backup’s encrypted client-to-store service, commonly provided by the bbstored daemon.

transport: tcp
in transit: encrypted
assignment: official
risk: 4/10
lookups: 0

also known as bbstored

Technical Details

what runs on :4186

Box Backup uses this TCP service for its client-to-store protocol; it is not an HTTP service. The bbstored daemon handles backup-client sessions using Box Backup’s own protocol over an encrypted SSL/TLS connection with certificate-based authentication. The listening port is configurable, so verify the daemon configuration rather than assuming every Box Backup installation uses 4186.

Security Information

exposure of :4186

risk score

4/ 10caution

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

file transfer averages 3.4 across 176 ports — this one sits 0.6 above.

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

every listening transport is another surface to filter at the edge

security overview

The service is designed to accept remote backup clients, but its store can contain sensitive backup data. Encryption and certificate-based authentication are part of the normal protocol; restrict access to authorized clients where practical, keep the server patched, and investigate unexpected listeners. It is not a general-purpose remote shell.

Record

iana registry entry

port: :4186
service: Box Backup Store Service
transport: TCP
encryption: tls / encrypted
assignment: iana registered
risk: 4/10caution
category: File Transfer System
usage: This is the IANA-assigned TCP port for the store service in Box Backup, an open-source backup system. The server-side bbstored daemon accepts connections from backup clients; the software is niche, so an open listener is more likely to be an explicitly configured backup server than a common general-purpose service.
lookups: 0rank 993
added: 2026-10-04
updated: 2026-10-04
references: IANA service name registry — port 4186

Something wrong?

This record is maintained by the engineers who use port 4186. 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
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edit this record →back to the registry

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risk mix of the 8 listed

caution100%

1 of 8 encrypted

Port :4186Box Backup Store Service

Technical Details

Security Information

Related Ports

Port 4186Box Backup Store Service