Remote and hybrid work have reshaped today’s workforce, with more than 95% of businesses now supporting some form of remote work. While this flexibility offers clear benefits, it also introduces new challenges, particularly for IT teams. As endpoints become more distributed and harder to manage, IT leaders are increasingly concerned about securing access and maintaining control.
But modernizing enterprise IT goes beyond simply deciding where applications run. It’s about delivering them securely, consistently, and cost-effectively across complex hybrid environments. As organizations blend on-premises infrastructure with public and private cloud services, the long-standing belief that “on-prem is more secure” is losing ground. The conversation is shifting toward a more pressing question: How do you protect both legacy and modern applications, wherever they reside, without sacrificing usability, performance, or budget?
The Evolution of Application Environments
For most enterprises today, hybrid IT is the norm. Whether due to technical debt, compliance needs, or strategic choices, workloads are distributed across on-premises servers and cloud-hosted infrastructure.
Legacy applications might still be hosted in internal data centers, while newer tools, such as CRM and collaboration platforms, reside in the cloud. Many IT teams are also implementing disaster recovery in the cloud, while keeping core operations on-premises. This diversity can offer flexibility, but it also creates inconsistent security postures and access gaps that bad actors can exploit.
While some still hold on to the idea that on-premises environments are more secure, the reality is not so simple. Public cloud providers invest billions in cybersecurity. Their dedicated security teams, threat intelligence capabilities, and rapid response mechanisms far exceed what many internal IT teams can replicate. Conversely, security on-prem isn’t inherently weaker, but it often suffers from under-resourced teams, slower patching cycles, and inconsistent policy enforcement.
The critical point isn’t where the app runs, it’s how it’s secured.
Five Key Security Considerations in Hybrid and Legacy App Delivery
Whether applications are hosted on-premises or in the cloud, IT teams face a common set of cybersecurity challenges that demand consistent and strategic management.
1. Unified Access Controls
Establishing consistent identity and access management is essential across hybrid environments. Multi-factor authentication (MFA) and conditional access policies should be enforced to maintain a strong security baseline. In a modern security model, identity becomes the new perimeter, ensuring only the right users, with the right roles, access the right resources, from trusted and compliant devices.
2. Network and Gateway Security
A secure network foundation involves more than just perimeter defenses. By decoupling data and access paths, implementing SSL offloading, and deploying load-balanced gateways, organizations can significantly reduce their attack surface. Approaches like Zero Trust are key here, requiring continuous verification of every connection, not just during login, but throughout the session lifecycle.
3. Browser and SaaS Isolation
According to a recent Parallels Cloud survey, it was found that 80% of all respondents have at least 25% of applications delivered as SaaS. In SaaS-heavy environments, Web browsers have become one of the most frequent entry points for threats. Browser isolation plays a crucial role in mitigating this risk. By rendering web content in secure, remote containers, this technique ensures that potentially harmful code never reaches the user’s local machine, protecting endpoints without impacting user experience.
4. Endpoint and Application Segmentation
Many legacy applications, particularly in sectors like finance and government, are still heavily dependent on Windows-based systems. IT teams should explore secure delivery models that can stream these apps, isolate them from broader environments, or run them locally when performance or privacy requirements demand it. Segmenting these workloads enhances both security and operational flexibility.
5. Versioning, Patch Management, and Visibility
Keeping application delivery platforms up to date is critical, not just for accessing the latest features, but for closing known security vulnerabilities. Effective version control and patch management processes are a must. In addition, monitoring tools should provide full visibility across on-premises, cloud, and edge environments, helping IT teams detect anomalies, enforce policy, and maintain audit-readiness with confidence.
Cost and Operational Considerations
Security can’t exist in a vacuum. Operational efficiency and cost are always part of the equation. The good news is a strong security posture often supports better cost control:
- Centralized delivery models simplify management and reduce overhead.
- Hybrid-friendly platforms give IT teams the freedom to place workloads where they perform best, without compromising security.
- Security tools that are built-in, not bolted-on, reduce integration costs and complexity.
By prioritizing platforms and architectures that embed security into the application delivery layer, organizations can protect data, reduce operational overhead, and improve user productivity, all while staying within budget.
As businesses modernize their environments, many face a common challenge: How do I securely run a legacy app in an environment designed for modern, distributed systems? Sometimes, it’s not even about where the app runs; it’s about making it accessible and secure across a diverse IT landscape. That might mean delivering a Windows-based application to a Mac endpoint while enabling it to interoperate with SaaS tools or AI features. In these cases, app uniformity becomes a strategic advantage, enabling consistent user experiences, automation, and even intelligent workflows.
Secure the App, Not Just the Infrastructure
The future of enterprise IT is hybrid, distributed, and dynamic. Organizations must move beyond the on-prem vs. cloud debate and focus on what truly matters: delivering secure, seamless, and cost-conscious access to the applications users need, wherever those apps reside.
Now is the time for organizations to rethink their remote access strategy. By embedding security into every layer of the application delivery model, IT teams can protect their environments without compromising productivity or agility. Because the future isn’t just about where people log in, it’s about how securely and efficiently they get things done.
Kamal Srinivasan is the Senior Vice President of Product and Program Management at Parallels (part of Alludo). With more than two decades of experience in the field, he’s renowned for building robust enterprise technology platforms. At Alludo, Kamal plays a pivotal role, collaborating closely with the product and engineering leaders to ensure the successful execution of the company vision.
The opinions expressed in this post belong to the individual contributors and do not necessarily reflect the views of Information Security Buzz.