Solution · Resilience

Backup an attacker cannot delete.

In a ransomware attack the backups are deleted first. Our backups keep an offsite copy nobody can delete for a set time, and we test that the data can be restored.

3-2-1 rule in placeImmutable where neededRestore tested on schedule

What changes for you

  • Fast recovery from small mishaps

    Local snapshots bring back deleted files and whole servers in minutes.

  • Survives an attack

    An encrypted copy sits offsite. Where needed it is immutable and cannot be deleted even with stolen admin credentials.

  • Restores tested

    We rehearse restores on a schedule and document how long they take. A green tick in the software is not enough for us.

  • Clear recovery plan

    You know in advance which systems come back in which order and how much data could be lost in the worst case.

What runs behind it

How we build in general

What it looks like

Log of nightly backups
Every backup run is logged and monitored. If one is missing, we see it immediately.

Service or project

We run it for you, or your team takes over.

As a managed service for a fixed monthly price, with updates, backup and monitoring. Or as a project with handover of network plan, runbook and all credentials.

For IT leads

Technical detailsZFS · Proxmox Backup Server · S3 Object Lock
Rule
3-2-1: three copies, two media, one offsite.
Snapshots
ZFS snapshots at short intervals.
Virtual machines
Proxmox Backup Server, incremental and deduplicated.
Offsite
Encrypted before data leaves the building. Second site or EU data centre.
Immutable
Optional S3-compatible object storage with Object Lock and a retention period.
RPO and RTO
Maximum data loss and recovery time are agreed per system.
Verification
Every backup run monitored, restore tests on a schedule and documented.

FAQ

Frequently asked questions

What does immutable backup mean?

A backup that cannot be changed or deleted for a set time, even with admin rights. It stops attackers from removing backups before they encrypt.

Is cloud sync enough as a backup?

No. Sync also copies deletions and encrypted files. A backup keeps earlier versions separate from the original.

Which technology do you use?

ZFS snapshots and replication, Proxmox Backup Server for virtual machines, encrypted offsite copies and, where needed, S3-compatible object storage with Object Lock.

Who do you offer this to?

For regulated companies, professions bound by confidentiality and anyone processing sensitive data, and for companies of about 30+ staff with critical systems.

Have your backup reviewed

Free first call

Briefly describe your situation. We help you assess it and plan the next step. Reply within 24 hours on working days.

Dipl.-Ing. Samuel Ziegler, BScFounder

office [at] vetosec [dot] at

Backup strategy, immutable backups and disaster recovery in Austria

vetosec designs and runs 3-2-1 backups with immutable copies and documented restore tests in Austria.

Updated: October 19, 2026