Secure, Ransomware-Proof Proxmox VE Appliance with Patented Air-Gapped Vault® and Immutability

Fully tested Proxmox VE ready hardware appliance with integrated patented automated Air-Gapped Vault® and immutability, threat detection & response, optional SAN, NAS, and object storage—powered by enterprise NVMe SSDs, SAS with active/active RAID, high-speed networking, and scalable petabyte-scale storage per 4U rackmount.

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Why Choose StoneFly’s Proxmox VE Appliance

Patented Air-Gapped Vault® with True Immutable Storage

Protect your Proxmox VE environment with the industry’s only appliance that delivers a patented automated air-gap and immutable storage in a single integrated platform. StoneFly’s Air-Gapped Vault® creates an offline storage tier that is completely isolated—physically and logically—from your production Proxmox VE environment.

Unlike solutions that rely only on snapshots, this is immutable storage at the volume level:

Data written to the vault is locked in place for a defined retention period

It cannot be modified, encrypted, or deleted—even by admin accounts, compromised credentials, scripts, or ransomware

After the job completes, the vault is taken offline and air-gapped until the next scheduled operation

Air-gapped and immutable storage that ensures your Proxmox VE data remains secure, clean, consistent, and tamper-proof for the entire retention window.

Only Proxmox VE Appliance with Built-In High Availability

This is the only Proxmox VE appliance available in a native high availability (HA) configuration.

StoneFly HA for Proxmox VE includes:

2x synchronized HCI controllers for continuous service

1x (or more) shared RAID storage array for consistent, highly available storage

Optional EBODs (expansion JBOD enclosures) for capacity growth

If one controller fails or needs maintenance, the other seamlessly takes over—keeping your Proxmox VE VMs, containers, and storage online without downtime.

Integrated Enterprise Storage Stack (SAN, NAS, Object)

Extend your Proxmox VE deployment with a full-featured low-latency storage stack powered by StoneFly’s patented storage virtualization engine:

SAN: Block storage for latency-sensitive workloads

NAS: File shares for users, applications, and backups

Object: S3-compatible object storage for archives, repositories, and scale-out use cases

All delivered from the same appliance, with centralized management and policy-driven provisioning.

Proxmox VE Appliance Built and Tested for Enterprise Virtualization

The StoneFly USS Proxmox VE Appliance is purpose-built and certified for Proxmox VE, delivering the performance, resilience, and security required for enterprise virtualization and clustering. Engineered for predictable data center operations, it provides a hardened platform for VMs, containers, HA workloads, and multi-node Proxmox VE clusters.

Unlike generic servers, it integrates StoneFly’s patented Air-Gapped Vault® with true immutable storage—combining physical air-gap isolation and tamper-proof, retention-based immutability to keep backup and replica data ransomware-proof.

The appliance supports single-node, dual-node HA, and multi-node cluster deployments, with optional integrated SAN, NAS, and S3-compatible object storage powered by StoneFly’s storage virtualization engine. With enterprise NVMe SSD, SAS, active/active RAID, and high-speed networking, it delivers consistent performance and scalable capacity up to multi-petabyte levels in a compact 4U rackmount.

Purpose-built for Proxmox VE. Hardened for security. Ready for enterprise scale.

Proxmox Virtual Environment Overview

Proxmox Virtual Environment is a complete, open-source server management platform for enterprise virtualization. It tightly integrates the KVM hypervisor and Linux Containers (LXC), software-defined storage and networking functionality on a single platform.

Key Features :

Unified Virtualization: Run both Virtual Machines (KVM) and lightweight Containers (LXC) on a single platform, allowing for maximum workload flexibility and resource efficiency.

Built-in High Availability (HA) Clustering & Live Migration: Zero-downtime through "live migration" and automated failover (HA) to ensure strict SLAs are met.

Flexible Storage Stack: Native support for local High-Performance (ZFS, LVM-Thin), Traditional Shared (NFS, iSCSI/FC SAN), and Distributed Software-Defined Storage (Ceph).

Hyper-converged setups (HCI).

Native Data Protection: Built-in backup/restore and storage replication. Seamless integration with Proxmox Backup Server for lightning-fast, deduplicated recovery.

Software-Defined Networking (SDN) & Integrated Firewall. Central, web-based management interface.

Built-In Proxmox Datacenter Manager

A centralized, open-source management layer for distributed Proxmox infrastructures. It provides a single control plane for multiple Proxmox Virtual Environment and Proxmox Backup Server remotes across clusters, sites, and data centers.

Designed for large-scale enterprise environments, it gives IT teams a complete overview of their distributed Proxmox virtualization infrastructures.

Enterprise Features for Secure, High-Performance Proxmox VE Deployments

Engineered to enhance and harden Proxmox VE environments, these built-in USS capabilities deliver advanced data protection, storage efficiency, and operational resilience for virtual machines, containers, and cluster workloads.

Air-Gapped & Immutable Storage

Automatically move critical Proxmox VE backups and replica data into an isolated, offline storage tier with built-in immutability. Data stored in the vault cannot be modified, overwritten, or encrypted—protecting your environment from ransomware and insider threats.

Immutable FileLock

Apply time-bound immutability to unstructured data such as VM exports, ISOs, logs, or application files. Even if ransomware attempts deletion or tampering, FileLock ensures the data stays intact for the full retention period.

Immutable S3 Object Lockdown

Enforce strict WORM-like protection for S3 objects stored on-premises or in the cloud. Ideal for Proxmox VE backup repositories and object-based archives, ensuring no edits, overwrites, or malicious encryption can occur.

Immutable Snapshots

Create immutable block, file, or object snapshots for Proxmox VE storage volumes. These locked snapshots provide a clean, uncompromised restore point—even if the active dataset is corrupted or encrypted.

Volume Deletion Protection

Prevent accidental or malicious removal of critical storage volumes. Deleting a volume requires a multi-step authorization workflow with StoneFly support to ensure only verified, intentional deletions occur.

End-to-End Encryption

Protect Proxmox VM data at every stage. Data at rest is secured with AES-256 encryption, while data in transit uses encrypted SSL/TLS channels—ensuring complete confidentiality across your entire workflow.

Multi-Factor Authentication (MFA)

Strengthen administrative security with MFA for both access and critical operations. Actions such as adjusting immutability policies or requesting volume removal require dual verification for maximum protection.

On-Demand Sandbox

Instantly deploy an isolated test environment directly on the appliance. Safely test patches, recover data, or validate configurations without affecting production Proxmox VE workloads.

Variable Block Deduplication

Reduce storage consumption for VM images, backups, and templates using multi-size block deduplication. The system stores only unique data segments—cutting unnecessary duplicates and optimizing capacity.

Synchronous & Asynchronous Replication

Maintain continuous availability with synchronous replication for real-time failover, or use asynchronous replication for efficient off-site redundancy. Your Proxmox VE data stays protected and recoverable regardless of distance or topology.

Thin Provisioning

Allocate storage to Proxmox VE volumes only as data is actually written. Optimize capacity planning, avoid over-provisioning, and scale your environment efficiently.

Frontend SSD Caching

Accelerate VM and container performance with intelligent SSD caching. Active and frequently accessed data is served from high-speed SSDs, improving responsiveness across your Proxmox VE environment.

Enterprise Use Cases for Proxmox VE Deployments

Built to support real-world production environments, this appliance delivers the performance, security, and resilience required for modern data-center workloads. Ideal for virtualization, secure backups, high-performance applications, and scalable Proxmox VE infrastructure.

Enterprise Features for Secure, High-Performance Proxmox VE Deployments

Designed for enterprises running Proxmox VE at scale, this architecture provides two fully independent hardware controllers within a single appliance—enabling isolated environments, secure storage workflows, and flexible deployment options without increasing rack footprint.

Isolated Security Zones

Each controller operates as a fully isolated environment with dedicated resources, enabling strict separation between production workloads and secure storage operations. This eliminates cross-impact issues, reduces latency risks, and strengthens security across your Proxmox VE deployment.

Flexible Configuration Options

Solution architects gain granular control over how the appliance is utilized. Both controllers can be configured to support distinct roles—production, backup, DR, secure storage tiers, or mixed workflows—to match specific Proxmox VE infrastructure requirements.

Controller 1 (SC-1): Proxmox VE Virtualization Host

SC-1 serves as the primary node for your Proxmox VE environment.

Runs Proxmox VE for production VMs and containers

Supports iSCSI/Fibre Channel, NFS, CIFS/SMB, and S3 REST API

Delivers consistent performance for compute, storage, and cluster operations

Controller 2 (SC-2): Secure High-Performance Storage Tier

SC-2 operates as a dedicated secure storage controller, enabling advanced data protection and high-performance storage services for Proxmox VE.

Capabilities include:

Synchronous & asynchronous replication for business continuity

Immutable & air-gapped storage for ransomware-proof protection

S3 Object Lockdown & Immutable FileLock for tamper-proof data retention

Continuous Data Protection (CDP) for near-zero RPO
Shared NAS repository for efficient cross-cluster file access

This architecture combines isolation, security, and performance—making it ideal for enterprises that need Proxmox VE environments capable of handling production, secure storage, and DR workflows from one integrated platform.

FlexStor ScaleHA™ — Cloud-Scale Proxmox VE HCI for MSP and Enterprise Data Centers

FlexStor ScaleHA™ is a cloud-scale, ransomware-resilient, high-performance Proxmox VE HCI platform designed for MSPs and large enterprise data centers that require unified SAN, NAS, and S3-compatible object storage at scale. Built and tested for Proxmox VE, it provides the flexibility to design, expand, and secure Proxmox VE clusters with the exact performance, capacity, and networking capabilities required for modern infrastructure.

Modular, Cloud-Scale Architecture for Proxmox VE

Architecture Components

Controller Directors (Two or More)

Each Controller Director includes an active/active storage virtualization engine with unified support for:

SAN block storage for VM disks and low-latency workloads

NAS file shares for ISOs, templates, cluster resources, and backup directories

S3-compatible object storage for Proxmox VE Backup Server, long-term retention, and scale-out repositories

This ensures consistent, highly available storage services across large Proxmox VE environments.

High-Speed Networking Fabric

Support for 2× 10/20/40/100/400 GbE enables extremely high throughput between Proxmox VE nodes and FlexStor ScaleHA™ storage infrastructure—ideal for multi-node clusters, high-I/O workloads, and MSP hosting environments.

Multi-Form-Factor Appliances

Available in 8, 12, 16, 24, 36, and 60-bay single, dual, or scale-out configurations, allowing Proxmox VE deployments to grow seamlessly—from compact MSP edge installations to full data-center-scale clusters.

Scalable Expansion Arrays

Optional 12, 16, 24, 36, 60, and 108-bay expansion units allow capacity to scale up to 256 drives per node, supporting multi-petabyte Proxmox VE deployments without service interruption.

M1 — High-Performance, Compact Proxmox VE HCI Appliance

M1 delivers the full capabilities of StoneFly’s HCI platform in a compact, cost-efficient appliance built and tested for Proxmox VE. Designed for SMBs, SMEs, and ROBO offices, it provides high-performance compute, storage, and networking for Proxmox VE virtual machines, containers, and lightweight clusters—all in a small, power-efficient footprint.

Powered by Intel 13th Gen processors, up to 96GB of memory, dual-channel 20/40Gbps storage connectivity, and multiple 10GbE SFP+ ports, M1 delivers enterprise-class responsiveness for local Proxmox VE workloads. Optional NVMe and HDD expansion, along with SAS storage and RAID expansion arrays, enable the appliance to scale as the environment grows—while maintaining reliable, predictable performance for distributed or space-constrained Proxmox VE deployments.

Deploy Your Proxmox VE Hyperconverged Solution Anywhere, Any Way : Scalable Solutions with StoneFly

Single-Node

Turnkey 8 to 60-bay hyperconverged appliances

Dual-Node

Dual-clustered hyperconverged appliances with automated failover & failback

Scale Out

Start with three hyperconverged appliances & scale out to as many nodes as you need.

High Availability

Modular hardware with two HCI controller nodes and one or more HA RAID array(s).

Supported Proxmox VE Plans

StoneFly is a certified Proxmox reseller and authorized support partner. Every StoneFly Proxmox VE appliance ships with your choice of Proxmox VE subscription pre-installed and fully activated — so your environment is enterprise-ready from day one. Need to license an existing deployment? We also sell all Proxmox VE subscription tiers as standalone licenses, with no hardware purchase required.

Stable and secure updates
All features: HA, Live Migration, Clustering, etc.
Response time: 1 business day
Datacenter Manager Enterprise Repository and support

Stable and secure updates
All features: HA, Live Migration, Clustering, etc.
Response time: 4 hours* within a business day
Remote support (via SSH)
Offline subscription key activation
Datacenter Manager Enterprise Repository and support

Stable and secure updates
All features: HA, Live Migration, Clustering, etc.
Remote support (via SSH)
Offline subscription key activation
Datacenter Manager Enterprise Repository and support

StoneFly’s Proxmox VE engagement doesn’t stop at a turnkey appliance or licensing. As a registered partner, we provide end-to-end professional services covering migration, deployment, training, environment optimization, and dedicated technical support — giving your organization a single, accountable partner for your entire Proxmox VE lifecycle.