Securing Your Private Cloud with Atmosphere

Protect your private cloud with Atmosphere. Explore best practices and built-in security features for a secure cloud environment.

As organizations increasingly migrate sensitive workloads to the cloud, ensuring top-notch security becomes a business-critical priority. Private cloud environments offer greater control over infrastructure and data, but they still face evolving security threats.

A 2024 survey found that better scalability, cited by 56% of respondents, was the top driver for adopting cloud-based security solutions — highlighting how modern security strategies are not only about protection, but also about enabling faster, more efficient operations.

Atmosphere — VEXXHOST’s OpenStack-based private cloud solution — provides a powerful foundation for building a secure and resilient cloud environment. This guide explores the key security features of Atmosphere and outlines best practices to help organizations safeguard their private cloud infrastructure.

Understanding the Security Landscape in Private Cloud Environments

Common Security Threats in Private Cloud Deployments

Private clouds provide organizations with dedicated infrastructure, greater control, and enhanced data governance. However, they are still vulnerable to many of the same security threats that plague public cloud environments — and in some cases, the risks can be even more critical due to misconfigured controls or lack of continuous monitoring.

Below, we can explore the key security threats in private cloud deployments.

Unauthorized access and privilege escalation

Weak identity and access management can lead to compromised credentials or elevated privileges, granting attackers unrestricted access to sensitive workloads.

Data breaches and leakage

Unsecured APIs, improper data encryption, or insider threats can result in the exposure of confidential business or customer data.

Distributed Denial-of-Service (DDoS) attacks

Malicious traffic can overwhelm cloud resources, disrupt services, and expose underlying infrastructure vulnerabilities.

Configuration and patching errors

Misconfigured network policies, exposed ports, or outdated software components can create exploitable entry points for attackers.

Insider threats

Malicious or negligent actions by internal users — including developers, admins, or third-party partners — can bypass security layers from within.

Understanding these risks is the first step toward designing a secure private cloud strategy. Solutions like Atmosphere help mitigate these vulnerabilities by offering built-in controls for access management, network segmentation, encryption, and continuous monitoring.

The Shared Responsibility Model in Private Cloud Security

Security in the cloud is a collaborative effort, and Atmosphere follows the shared responsibility model — a well-established framework that clearly defines which security tasks fall to the cloud provider and which remain the customer’s responsibility.

With Atmosphere, we are responsible for securing the core infrastructure, including the physical hardware, network, virtualization layer, and the managed OpenStack services that power your private cloud environment. This includes implementing access controls, system patching, and physical data center security.

Meanwhile, customers retain responsibility for securing their data, workloads, applications, and identity management. This includes tasks such as setting up user roles and permissions, configuring firewall rules, encrypting data at rest and in transit, and ensuring secure application development practices.

By understanding and properly executing their part of the model, customers can build a secure, compliant, and resilient private cloud environment with Atmosphere as the foundation.

Core Security Features of Atmosphere

Atmosphere’s architecture integrates security at every layer of the private cloud stack, enabling customers to implement granular controls and safeguard their environments.

Identity Service and Access Management

Role-Based Access Control (RBAC): Atmosphere’s Identity Service empowers organizations to assign precise access rights based on user roles, minimizing unnecessary privileges.
Enterprise Authentication Integration: Seamless integration with LDAP, SAML, and OpenID Connect through Keycloak ensures centralized identity management and secure authentication across environments.

Compute Service Security

Instance Isolation: Atmosphere ensures virtual machines (VMs) and bare metal servers operate in isolated environments, preventing lateral movement between workloads.
Secure Provisioning: Automated and policy-driven provisioning of resources enforces security configurations from the moment instances are deployed.

Networking Service Security

Virtual Private Networks (VPNs) and Firewalls: Atmosphere enables customers to build secure network perimeters with software-defined VPNs and customizable firewall rules.
Distributed Networking with OVN: Open Virtual Network (OVN) ensures advanced network isolation, distributed routing, and secure multi-tenant networking.

Advanced Security Measures for Enhanced Protection

Beyond foundational protections, Atmosphere offers a suite of advanced security features designed to strengthen workload isolation, ensure data confidentiality, and maintain high availability in complex environments.

Block Storage Encryption at Rest

Atmosphere provides native encryption for block storage volumes, ensuring that all data at rest is securely encrypted using industry-standard protocols. This protects sensitive information even in the unlikely event that physical storage devices are lost, stolen, or accessed without authorization. Encryption keys are managed through integrated key management services, adding an extra layer of control and compliance.

Kubernetes Service Security

As containerized applications become more prevalent, securing Kubernetes infrastructure is essential. Atmosphere’s Kubernetes Service offers robust security capabilities, including:

Cluster Isolation: Each Kubernetes cluster is fully isolated from others, preventing data leakage or unauthorized access between tenants in a shared environment. This design is especially critical for multi-tenant deployments and regulated industries.
Auto-healing and Auto-scaling: Atmosphere ensures service resilience with automated self-recovery mechanisms and dynamic scaling. These features not only reduce downtime but also protect against resource-based denial-of-service incidents by maintaining optimal workload distribution.

Load Balancer Security

Atmosphere’s integrated load balancer includes multiple layers of security to protect and manage inbound traffic:

TLS Termination and Certificate Management: Secure HTTPS connections are simplified through built-in TLS termination. Atmosphere handles certificate issuance, renewal, and revocation, helping organizations maintain strong encryption practices without manual overhead.
Health Checks and Anomaly Detection: Continuous monitoring of backend services ensures that only healthy nodes receive traffic. Anomaly detection mechanisms alert administrators to irregular traffic patterns, helping identify potential threats such as DDoS attempts or misconfigurations early.

Together, these advanced features allow Atmosphere users to deploy secure, scalable applications in a controlled private cloud environment, without compromising performance or visibility.

Monitoring, Compliance, and Auditability

Maintaining visibility into cloud operations is crucial for both security assurance and regulatory compliance. Atmosphere equips organizations with the tools they need to monitor activity, enforce policies, and protect sensitive data with confidence.

Usage Service for Audit Trails

Effective encryption is only as strong as the keys that protect it. Atmosphere’s Key Management Service (KMS) ensures that encryption keys are managed securely and efficiently throughout their lifecycle.

Encryption Key Lifecycle Management: Customers can generate, rotate, revoke, and audit encryption keys with precision, maintaining tight control over data access and aligning with compliance mandates.
HSM Support: For workloads that demand the highest level of cryptographic assurance, Atmosphere supports integration with Hardware Security Modules (HSMs). This enables secure key storage in tamper-resistant hardware, ideal for highly regulated industries such as healthcare, finance, and government.

By combining auditability with strong key governance, Atmosphere helps enterprises stay compliant, respond quickly to incidents, and safeguard their private cloud environments against evolving security threats.

Best Practices for Securing Your Private Cloud with Atmosphere

To maximize security in Atmosphere-powered private cloud environments, adopt a proactive, layered security strategy. This begins with the consistent application of security updates and patches across all infrastructure components to mitigate vulnerabilities as they emerge. Regular benchmarking, vulnerability assessments, and penetration testing help identify and remediate potential weaknesses before they can be exploited. Equally important is the implementation of robust backup and disaster recovery plans, which ensure business continuity in the event of data loss, system failure, or cyberattacks. Finally, cultivating a culture of security awareness through ongoing staff training equips teams to recognize and respond to threats effectively, reinforcing the overall security posture of the organization.

Securing Your Cloud with Confidence: Technology + Expertise

Building and maintaining a secure private cloud requires more than just advanced tools — it demands expert guidance and ongoing vigilance. With Atmosphere, organizations benefit from a powerful combination of built-in security features and specialized professional services designed to harden cloud environments at every layer.

From security architecture and strategy consulting to expert-led deployments and 24x7x365 support, Atmosphere empowers businesses to stay ahead of evolving threats while meeting compliance requirements with confidence. Whether you're launching a new private cloud or optimizing an existing one, our team is here to help you design, deploy, and manage a solution that aligns with your security goals.

By embracing proactive security best practices and partnering with trusted experts, you can confidently operate a resilient, scalable, and secure private cloud with Atmosphere.

Ready to elevate your cloud security posture?
Contact us today to learn how Atmosphere can support your journey to a more secure cloud environment.