Tools: Update: How to Configure Immutable Backups on a Dedicated Server to Prevent Ransomware

Tools: Update: How to Configure Immutable Backups on a Dedicated Server to Prevent Ransomware

The Architectural Choice: Cloud Storage vs. Dedicated Server

Our Immutable Tech Stack

The Full Configuration Guide Ransomware operators have evolved. They no longer just encrypt your active databases; their primary target is your backup repository. If your server backups are compromised, encrypted, or deleted, you lose your only leverage. The absolute best defense against this is configuring immutable backups using a WORM (Write Once, Read Many) architecture. An immutable backup ensures that once your data is written, it cannot be modified or deleted by anyone—not even the system administrator—until a strict time limit expires. When setting up immutable backups (S3 Object Lock), system administrators typically face two choices: To build this secure, self-hosted vault, we utilize two powerful open-source tools: Setting up the Docker containers, generating restricted IAM Access Keys, initializing the repository, and automating the Restic backup via Cron requires a specific pipeline and terminal commands. To keep this post clean, we have published the complete, step-by-step engineering guide (with all the code snippets and bash scripts) on our tech blog. 🔗 Read the full Step-by-Step Guide: How to Configure Immutable Backups using MinIO & Restic How is your team currently handling backup immutability? Are you using public cloud or self-hosted solutions? Let's discuss in the comments! 👇 Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink. Hide child comments as well For further actions, you may consider blocking this person and/or reporting abuse - Public Cloud Storage (AWS S3, Wasabi): Sending backups to a public cloud is easy, but you are charged per gigabyte and face unpredictable, massive "egress fees" when you need to download your data for a restoration. - A Secondary Dedicated Backup Server: By provisioning a completely isolated Dedicated Server, you get a flat monthly rate, 100% data sovereignty, and raw hardware performance during critical disaster recovery operations without egress fees. - MinIO: Deployed via Docker to act as our self-hosted S3-compatible storage. This allows us to enable native Compliance Mode Object Lock on our own hardware. - Restic: A fast backup client running on the primary server. Restic deduplicates the data and encrypts everything locally via AES-256 before it is sent over the network.