Move your TrueNAS backups offsite
An Rsync Task (or Cloud Sync → SFTP/S3) writes, over a dedicated VPN, to the Nimbus Backup Gateway, which protects your data with Proxmox Backup Server (Primary PBS → AirGap → LTO). No remote ZFS daemon, no open port.
The right protocol to take TrueNAS offsite
TrueNAS CORE and SCALE can push data to a remote target two ways that the Gateway supports: the Rsync Task (rsync over SSH) and the Cloud Sync Task (SFTP, FTP, WebDAV or S3). We recommend the Rsync Task: incremental, lightweight and driven directly by TrueNAS. Unsure which method fits? See the guide on choosing the right backup method, or the full comparison of paths in the protocols matrix. Also run a Synology NAS or a database? See offsite backup for a Synology NAS or offsite database backup.
The trap: ZFS replication won't reach the Gateway
The natural reflex on TrueNAS is to go offsite via ZFS replication (zfs send/recv). But that method requires a ZFS pool and an SSH daemon on the target side to receive the stream. The Gateway is a multi-source ingestion point — not a ZFS host dedicated to your pool — and does not expose a zfs recv receiver.
ZFS send/recv replication
Requires ZFS + SSH on the target. Not available on the Gateway.
Rsync Task / Cloud Sync
Natively ingested by the Gateway, then protected to PBS.
Your ZFS snapshots stay managed locally on the TrueNAS for close-range versioning; the offsite copy goes through rsync or Cloud Sync and then inherits PBS retention and immutability.
How it works, step by step
Four steps, without touching your pools or your local snapshots.
Dedicated VPN
We set up an encrypted tunnel (WireGuard or OpenVPN) between your TrueNAS and the Gateway. Nothing is exposed in clear on the internet.
Rsync Task to the Gateway
You create an Rsync Task (rsync over SSH) in TrueNAS CORE/SCALE that writes to the Gateway. Incremental transfers, attributes preserved. Cloud Sync → SFTP/S3 as an alternative.
Nimbus protects to PBS + AirGap
The Gateway buffers ingestion, then Nimbus replicates to a Primary PBS — and optionally a disconnected AirGap PBS and LTO tape in a vault. Retention and immutability on the PBS side.
Restore test
We validate a real restore from the Nimbus chain, then sign off go-live.
Everything runs inside a dedicated VPN (0 inbound port); rsync preserves the source's native incremental; downstream the Gateway buffers → PBS (immutable) → AirGap → LTO.
How much does it cost?
The Gateway Cloud starts at 150EUR excl. tax/month (2 TB included, +15EUR excl. tax/TB). Full detail of the offers (Cloud, Appliance), setup, the antivirus scan option and the PBS tiers is centralized on the hub.
See offers and pricingFrom your TrueNAS to the air-gap
Multi-PBS architectures and the disconnected copy are detailed on PBS plans and AirGap PBS. To gauge how long the first rsync transfer will take, estimate your backup window.
Go further
NAS backup hub
The Gateway, its protocols and all offers.
Protocols matrix
rsync, SFTP, S3, WebDAV: what works per source.
Choose your method
The Proxmox / Gateway / Client decision guide.
Synology / Hyper Backup
The Hyper Backup equivalent for Synology NAS.
PBS plans
The Nimbus Proxmox Backup Server plans.
AirGap PBS
A disconnected, out-of-reach copy.
TrueNAS FAQ
Take your TrueNAS offsite with confidence
We plug an Rsync Task into the Gateway, protect to PBS and validate a restore. 15-minute tech call, no commitment.