security

Archive your backups to a remote offline Cloud-PBS instance

How to archive your Proxmox backups to an air-gapped, offline Cloud-PBS instance for maximum protection.

By Emmanuel · Updated April 16, 2025
Archive your backups to a remote offline Cloud-PBS instance

For the highest level of data protection, Cloud-PBS offers offline backup copies — air-gapped archives that are completely isolated from your production infrastructure and online backup instances.

What is an offline backup copy?

An offline backup copy is a replica of your backup data stored on infrastructure that is:

  • Not continuously connected to the internet
  • Not accessible from your production network
  • Physically separate from your primary backups

This provides protection against even the most sophisticated attacks, where an attacker compromises both your production environment and your online backup server.

How Cloud-PBS Offline Backup Copy works

  1. Your Proxmox VE servers back up to your primary Cloud-PBS instance (online, always available)
  2. Periodically, Cloud-PBS creates an offline copy of your backups
  3. The offline copy is stored on separate infrastructure with restricted access
  4. The offline copy follows its own retention policy

Use cases

Ransomware protection

Even if ransomware manages to compromise your production servers and your online backups, the offline copy remains untouched.

Regulatory compliance

Many compliance frameworks (HIPAA, SOC 2, etc.) require maintaining backup copies in separate, isolated locations. Offline copies help meet these requirements.

Long-term archival

Keep long-term archives of your backup data without consuming storage on your primary instance.

Setting it up

The Offline Backup Copy service is available as an add-on to any Cloud-PBS plan. Contact us or add it from your dashboard.

Best practices

  • Set an appropriate schedule — daily or weekly depending on your RPO
  • Define retention policies that match your compliance requirements
  • Test restores from offline copies periodically
  • Keep your primary Cloud-PBS instance as your first line of recovery; use offline copies as the last resort
proxmox offline-backup archive air-gapped

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