Proxmox Backup Server

Proxmox Backup Server is the software counterpart to the dedicated backup hardware it runs on, built by the Proxmox team itself rather than a third party, so it integrates tightly with Proxmox VE: deduplication, incremental backups, and client-side encryption all work out of the box.

It powers on via BIOS before the nightly backups, and a cron job powers it back off once they’re done, so the machine only draws power while it’s actually needed. A verification pass runs every day to confirm the backups aren’t corrupted.

Its own web UI covers datastore management and backup verification; the scheduling of when its storage target is mounted in Proxmox is handled by the cron_configuration role rather than PBS itself.