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IT professional inspecting Veeam immutable S3 API object lock settings in a European data center server room.

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IT professional inspecting Veeam immutable S3 API object lock settings in a European data center server room.

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IT professional inspecting Veeam immutable S3 API object lock settings in a European data center server room.

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A Practical Guide to Veeam Immutable S3 API Object Lock for EU Data Sovereignty

18.07.2025

11

Minutes

Thomas Demoor

CTO Impossible Cloud

18.07.2025

18.07.2025

11

Minutes

Thomas Demoor

CTO Impossible Cloud

Ransomware threats and complex EU regulations demand a modern data protection strategy. Using Veeam immutable S3 API object lock on a sovereign cloud platform provides a powerful defense. This guide details how to secure your backups while ensuring GDPR, NIS-2, and EU Data Act compliance.

Key Takeawys

Using Veeam with S3 Object Lock on a sovereign EU cloud is a critical defense against ransomware and ensures compliance with GDPR.

New regulations like NIS-2 and the EU Data Act make immutable, portable backups a legal necessity for many European organizations starting in 2025.

A predictable cost model with no egress or API fees simplifies budgeting and enables MSPs to build profitable, compliant BaaS offerings.

For UK and EU enterprises, data is not just an asset; it's a liability if managed improperly. A majority of EU decision-makers now demand European solutions for critical data, yet over 50% feel locked into their current providers. The combination of rising ransomware attacks and new regulations like NIS-2 requires a shift in backup strategy. Implementing Veeam with a sovereign, S3-compatible object storage that features immutable backups is no longer optional. It is a core requirement for business resilience and regulatory adherence, ensuring data remains secure, recoverable, and under strict EU control.

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Establish Digital Sovereignty with EU-Centric Storage

A strong majority of EU leaders now prioritize European solutions for their critical data infrastructure. This shift is driven by the need to comply with GDPR and avoid exposure to non-EU laws like the CLOUD Act. Storing backup data within certified European data centers ensures it remains under EU legal jurisdiction, a key requirement for many regulated industries.

Using a cloud provider that is both EU-owned and operated provides the highest level of assurance. It guarantees that data governance, from key management to access controls, aligns with European standards. This sovereign-by-design approach is the foundation of a modern resilience strategy.

Impossible Cloud operates exclusively in certified European data centers, offering country-level geofencing to meet stringent data residency requirements. This architecture provides the legal certainty that enterprises and MSPs need to protect their Veeam backups confidently. The next step is securing that data against modern threats.

Implement Ransomware Protection with Veeam Immutable S3 API Object Lock

Immutable backups are the last line of defense against ransomware, ensuring a clean recovery point. Veeam utilizes the S3 Object Lock feature to make backup files unchangeable for a defined retention period. Even with administrative credentials, an attacker cannot delete or encrypt these protected backups, rendering their efforts useless.

There are two primary modes for S3 Object Lock that Veeam supports:

  • Compliance Mode: This offers the highest level of protection. Once set, the immutability period cannot be shortened or removed by any user, including the root account.

  • Governance Mode: This mode also protects against deletion but allows users with special permissions to alter the lock settings. It offers flexibility but is less strict than Compliance mode.

For maximum security, Compliance mode is the recommended best practice for most Veeam backup repositories. Impossible Cloud’s platform fully supports the Veeam immutable S3 API object lock, providing a secure target that integrates seamlessly with your existing backup jobs. This technical safeguard is crucial for meeting new cybersecurity mandates.

Align with 2025 EU Regulations: NIS-2 and the Data Act

The NIS-2 Directive, which must be transposed into national law by October 2024, mandates stronger cybersecurity measures for critical sectors. It requires organizations to implement comprehensive backup and recovery strategies, including regular testing and ensuring backups are protected from unauthorized access. Using immutable storage is a direct and effective way to meet these resilience requirements.

Furthermore, the EU Data Act applies from September 2025 and is designed to prevent vendor lock-in. It requires cloud providers to facilitate data portability, allowing customers to move their data and applications without technical or contractual barriers. This aligns perfectly with a strategy based on open standards like the S3 API.

By choosing an S3-compatible platform with a transparent cost model, you are already preparing for this shift. Impossible Cloud’s policy of zero egress fees and API call costs directly supports the Data Act’s goal of creating a fairer, more competitive EU cloud market. This prepares your IT infrastructure for the next wave of European digital regulation.

Leverage an Architecture Built for Performance and Simplicity

Effective backup and recovery depend on more than just immutability; they require performance and accessibility. Many cloud storage solutions use complex tiering, where data is moved to slower, cheaper storage over time. This can lead to restore delays of several hours and unexpected fees when you need to retrieve data urgently.

Impossible Cloud employs an “Always-Hot” architecture, where every object is immediately accessible. This model eliminates the complexity and unpredictability of tiering, ensuring consistent read/write performance and zero delays during a recovery scenario. This approach reduces operational overhead by at least 15% for many IT teams.

Full S3 API compatibility ensures your existing Veeam scripts and workflows function without modification. This protects your investment in current tools and minimizes migration risk. An architecture designed for consistency and availability is essential for a reliable Veeam backup solution.

Create Value for MSPs and Channel Partners

For Managed Service Providers, predictable costs are essential for building profitable Backup-as-a-Service (BaaS) offerings. A storage solution with no egress fees or API call costs means margins are stable and defensible. This predictability allows MSPs to offer competitive pricing to their clients without risking surprise charges that erode their profits by up to 20%.

A partner-ready platform should include features that simplify management and onboarding. Key capabilities include:

  1. Multi-tenant management console with role-based access control (RBAC).

  2. Automation capabilities via a full-featured API and CLI.

  3. Detailed reporting for billing and compliance purposes.

  4. Fast onboarding processes that take hours, not weeks.

With growing distribution momentum through partners like api in Germany and Northamber plc in the UK, local access for resellers is expanding. This ecosystem provides the tools and support needed to deliver sovereign, compliant backup solutions to a wider market. This partner focus builds a resilient channel for the future.

Follow a Practical 4-2-2 Backup Implementation Model

The traditional 3-2-1 backup rule is a great start, but a modern approach enhances it for today's threat landscape. A 4-2-2 model provides an even higher degree of resilience. It involves maintaining 4 copies of your data on 2 different media types, with 2 copies located offsite.

One of those offsite copies should be immutable, protected by S3 Object Lock. This ensures that even if your primary site and traditional backups are compromised, you have a guaranteed-clean recovery point. This air-gapped, immutable copy is your ultimate insurance policy against catastrophic data loss.

Implementing this with Veeam and Impossible Cloud is straightforward. You can configure a Scale-out Backup Repository (SOBR) to automatically tier backups to our S3-compatible storage. This allows you to enforce immutability as part of your standard backup lifecycle, providing robust ransomware protection with minimal administrative effort. Your next step is to start the transition.

Begin Your Transition to a Sovereign Backup Strategy

Content


<p>Migrating your Veeam backups to a new storage target can be accomplished with zero downtime. The first step is to add Impossible Cloud as a new performance or capacity tier in your existing Veeam setup. This process takes less than 15 minutes for an experienced Veeam administrator.</p><p>Once configured, you can begin moving backup copies to the new repository while existing jobs continue to run. This phased approach allows you to test performance and validate recovery processes without disrupting production workflows. <strong>A successful migration relies on a well-defined plan and thorough testing. </strong></p><p>Start by identifying a non-critical workload to migrate first. Document the process, test a full restore, and then scale the migration across your environment. To get started on your journey to a more resilient and compliant backup infrastructure, <a href="/partner/veeam-cloud-connect-ransomware-protection">talk to an expert</a> today.</p>


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FAQ

What is the difference between S3 Object Lock Compliance and Governance mode in Veeam?

Compliance mode is the strictest form of immutability; once a backup file is locked, no user (including the root account) can alter or delete it until the retention period expires. Governance mode offers similar protection but allows users with special permissions to override the lock settings, providing more administrative flexibility.



Can I migrate my existing Veeam backups to an immutable repository?

Yes, you can add an immutable S3 object storage repository, like Impossible Cloud, to your Veeam Scale-out Backup Repository (SOBR). You can then evacuate existing backups from an old extent to the new immutable extent or direct new backup copy jobs to it.



Are there any performance differences with immutable object storage?

Performance depends on the provider's architecture. Impossible Cloud uses an 'Always-Hot' model, meaning all data is instantly accessible with no performance degradation or delays typically associated with tiered or archived storage. This ensures fast restores when you need them most.



How does using a European cloud provider help with the NIS-2 Directive?

The NIS-2 Directive mandates robust cybersecurity and resilience measures, including secure backup and recovery. Using an EU-based provider with immutable storage helps fulfill these obligations while also ensuring your supply chain for critical IT infrastructure aligns with European sovereignty goals.



What are egress fees and why are they important for backups?

Egress fees are charges for moving your data out of a cloud provider's network. For backups, these costs can become significant and unpredictable during large-scale recovery operations. Choosing a provider like Impossible Cloud with a zero-egress-fee policy eliminates this risk and makes costs predictable.



Is Impossible Cloud fully S3 compatible?

Yes, Impossible Cloud provides full S3 API compatibility. This means your existing applications, scripts, and tools, including Veeam Backup & Replication, will work seamlessly without any need for code rewrites or complex configuration changes.



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Impossible Cloud is your European alternative for S3-compatible object storage. Data resides in GDPR-compliant, certified EU data centers; Object Lock and versioning protect against ransomware. Transparent pricing with no egress or API fees. Perfect for backup, archive, and disaster recovery.

Impossible Cloud is your European alternative for S3-compatible object storage. Data resides in GDPR-compliant, certified EU data centers; Object Lock and versioning protect against ransomware. Transparent pricing with no egress or API fees. Perfect for backup, archive, and disaster recovery.

Impossible Cloud is your European alternative for S3-compatible object storage. Data resides in GDPR-compliant, certified EU data centers; Object Lock and versioning protect against ransomware. Transparent pricing with no egress or API fees. Perfect for backup, archive, and disaster recovery.