# WHATPORT(5120)

## NAME

port 5120 — Barracuda Backup replication — Barracuda Backup's offsite replication port — outbound from the appliance, never inbound.

Protocol: TCP/UDP  
IANA registry

## DESCRIPTION

IANA registers 5120 as barracuda-bbs, the Barracuda Backup Protocol. Barracuda's documentation puts 5120-5129 in the outbound set a Backup appliance needs, using them to replicate data to Barracuda Cloud Storage or to a second Barracuda Backup device. The vendor is explicit that no inbound ports are required: the appliance always initiates the connection, and these ports cannot be proxied.

## EXPOSURE

**Expose with care.** Allow it outbound from the backup appliance only. There is no reason for an inbound firewall rule on 5120, so a listener answering from the internet is not a normal Barracuda deployment.

## CHECK

```sh
nc -vz TARGET 5120
```

## SEE ALSO

- docs — [Barracuda Backup — Port Usage](https://documentation.campus.barracuda.com/wiki/display/BBSv42/Port+Usage) (documentation.campus.barracuda.com)
- iana — [IANA port registry — 5120 (barracuda-bbs)](https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml?search=5120) (iana.org)

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HTML: <https://whatport.net/5120/> · JSON: <https://whatport.net/5120.json> · full dataset: <https://whatport.net/ports.json>