Only niche organizations are run completely on-premises anymore, and none-run entirely within a single public cloud. The average enterprise environment today looks like this patchwork: legacy systems still rumbling away in a private data center, workloads deployed across one or more public cloud providers, and SaaS applications managing the entire spectrum of requirements from email through records of customer engagement. This combined model, typically referred to as a hybrid architecture, offers significant value in agility and cost management, but it also creates a security surface that is anything but the clean, perimeter-facing networks of 10 years ago.
In fact, securing a hybrid environment is an entirely different challenge from securing a single, monolithic system. Data never rests, flowing back and forth between on-premises infrastructure and cloud platforms. You always have to verify identities, regardless of the request’s origin. The more connected the systems, the harder it is to have a clear view of what happens across the entire environment. IT leaders assessing their posture in a hybrid security landscape must prepare to think more about architecturally integrated security, where all components of the system need to be secure, rather than focusing on securing each piece individually.
Getting a clear picture of cloud computing security for hybrid architectures means starting with an honest inventory of where data actually lives and how it moves. Many organizations discover, once they map this out, that data flows through more intermediate systems than anyone expected. A customer record might touch an on-premises database, a cloud-based analytics platform, and a third-party integration before a report ever reaches a dashboard. Every one of those hops is a place where security controls need to be applied consistently.
New Certain Risk Introduced by Hybrid Environments
Incompatibility is the main challenge with hybrid architecture. For on-premises systems and cloud platforms, separate tools are commonly used for identity management, logging, and access control. If these are not intentionally tied together, security teams then deal with multiple disparate policy sets as gaps often occur at the seams. An on-premises directory service and a cloud identity provider, for example, can create portents of danger through a misconfigured trust relationship that neither system’s own security tooling will catch.
The same is true for the risk of network segmentation. The traditional segmentation approach made the assumption that the network topology was somewhat static but hybrid environments are inherently dynamic. The workloads are spinning up and down, connections forged between systems that didn’t talk last week, and the line dividing “trusted internal network” from “far-flung cloud service” grows increasingly blurry. One of the more common mistakes organizations make when their architecture becomes hybrid is treating segmentation as a design exercise rather than an ongoing discipline.
Identity as the Connecting Thread
As hybrid environments span so many different systems, identity is becoming a more common security control than network location. Identity and associated permissions for users or workloads must flow freely across on-prem and cloud borders. The move to identity-based security has made authentication and authorization decisions much more important than they were a decade ago, but weaknesses in the management of identities are likely going to impact many parts of the hybrid environment rather than just one system.
Technical standards are involved, even as they tend to be in the background. The primary protocol for hybrid security, regardless of whether the connecting point is an office network or a cloud gateway, is authentication, which governs how devices and users prove their identity before gaining network access. Consider the port-based network access control standard which illustrates just how deeply embedded this kind of authentication infrastructure is in modern networking, literally providing the underlying mechanism that many identity and access systems build on top of even within environments that don’t resemble wired office networks standard was originally addressing.
Managing Configuration Sprawl
Configuration drift is a major problem in hybrid environments and only worsens as the architecture becomes more complex. For example, a security team might build strong baseline configurations for on-prem and cloud systems upon launch only to see those configurations diverge over months because various teams were making changes for different reasons. Cloud resources are provisioned rapidly, often in contrast to formal change management processes, on-premises systems accrue patches and adjustments on their own time schedule.
A single consistent view across environments in tools like these helps address this issue by providing teams with the ability to apply policy uniformly, rather than treating on-premises resources entirely separately from cloud. To some extent, centralized management platforms are a practical necessity for organizations piecing together the hybrid environments that so often become fragmented. This trend is seen in that fact that solutions for unified management across hybrid cloud environments are emerging, which offer consistent governance and policy enforcement to resources irrespective of their physical running location thereby minimizing the possibility that a security control applied in one environment just never gets enforced in a second.
Building Toward Consistent Protection
Organizations that successfully manage hybrid security tend to possess a key characteristic: they view the hybrid architecture as just another system to protect, not two disparate environments that fall over each other every time they’re connected. This change in mindset permeates everything from policy writing to incidents investigation. A security event that starts in a cloud workload and spans an on-premises system should require a unified response, not two teams working from separate playbooks.
Some practical steps you can take to promote this consistency include creating global identity and access policies that apply everywhere, normalizing logging formats so you can correlate events across multiple systems, and building monitoring across the entire environment rather than just at the edge of any one platform. None of this happens automatically. This necessitates intentional architectural choices that recognize that the line between on-prem and cloud is now a design detail, not a security perimeter.
Hybrid architecture is not a transitional stage most organizations are simply passing through on their journey towards an every-application-in-the-cloud future. For some it is a transitory model but for most it is the permanent operating model, driven by legacy investments, regulatory requirements and common sense cost management. Creating security practices that treat this hybrid reality as the new normal, rather than an exception to be minimized, provides IT leaders with a much stronger platform than attempting to cram a single-environment security model onto an architecture never intended to accommodate one.
FAQs
What makes hybrid cloud security different from securing a single environment?
Hybrid environments cut across systems with layered, discrete native tools for identity, logging and access control. Where these are not actively unified, seams between on-prem.Calypso and cloud systems tend to develop gaps.
Why does identity matter so much in hybrid architectures?
Identity then becomes a foundational connector among all your security decisions–wherever the request comes from in hybrid environments that do not have one consistent network perimeter.
How to avoid configuration drift across hybrid environments?
Tools that centralize management with a single view across on-premises and cloud resources allow policy to be applied uniformly. Frequent review cycles and a standardized change management process will also minimize the gap between desired state parameters and actual configuration.
