Unified SASE: Simplifying Enterprise Security for the Hybrid Era
In a fast-changing cyber threat landscape, traditional perimeter-based security is no longer fit for purpose. At the recent webinar "SASE and the Future of Security", Hosted by Executive Leaders Network and Inspired Business Media, moderated by Rebecca Hopwood Keay, Direct Marketing Manager at Nasstar, alongside two industry experts — Leigh Walgate, Managing Director at Nasstar, and David Nicoll, SASE Expert at Fortinet — we explored why Unified SASE is becoming essential to modern enterprise security strategies.
This one-hour session unpacked how organisations can move away from fragmented tools and outdated architectures, adopting a converged cloud-native approach to protect users, simplify operations, and enable secure digital transformation.
The Problem with “Castle and Moat” Security
Leigh opened by outlining the flaws in the once-dominant castle and moat model, where corporate firewalls protected a fixed perimeter. This approach made sense when all applications and data were kept on internal networks. Today, however, employees work from anywhere, using cloud-hosted services and public internet connections.
Many security tools still assume the old perimeter exists. VPNs, for instance, grant wide network access once credentials are validated — making stolen logins a direct route to lateral movement within systems. Zero Trust principles — “never trust, always verify” — are now critical to minimise risk, continuously authenticating and authorising every access request.
The Human Factor in Cyber Breaches
With 80% of breaches now targeting users, the panel agreed hybrid working is only part of the problem. Attacks are increasingly sophisticated, often AI-driven, using compelling phishing or social engineering to bypass technical controls. Remote users, especially those on unsecured public Wi-Fi, are attractive entry points for cybercriminals.
The cost of breaches remains high, with the average incident totalling $4.9 million — excluding downtime, reputational damage, and regulatory impact. Both speakers stressed the need for proactive measures to reduce attack surfaces and contain incidents when they occur.
What SASE Really Is — and What It’s Not
David traced the origins of SASE (Secure Access Service Edge) back to Gartner’s 2019 model: a converged, cloud-based platform combining networking (SD-WAN) with multiple security functions, including Zero Trust Network Access (ZTNA), secure web gateways, firewalls, and CASB for SaaS application protection.
SASE is not a new set of security tools — it’s a way of delivering them in a unified, cloud-native framework. While early adopters had to stitch together multi-vendor solutions, the market has matured to offer Unified SASE platforms that integrate networking and security into a single, centrally managed system.
From Multi-Vendor Complexity to Unified SASE
Many organisations have accumulated a patchwork of point solutions, leading to integration gaps, inconsistent policies, and high operational overhead. Unified SASE simplifies this by consolidating functions under one vendor, reducing licensing, administration, and skills burden.
Leigh noted that this frees security teams to focus on higher-value tasks like threat hunting and automation rather than managing policy alignment across disparate systems.
For end users, Unified SASE means a seamless experience: no clunky VPNs, no multiple passwords, and consistent performance whether in the office or remote.
Overcoming Adoption Challenges
The main barriers to SASE adoption are not technical, but operational: contractual lock-ins with existing vendors, perceived risk of migration, and resistance to change. To address this, Nasstar uses a SASE Adoption Framework:
- Identify & Prioritise transformation candidates
- Assess & Audit current posture and inventory
- Prove Value before full production
- Implement in controlled stages
- Run & Optimise continuously
This lifecycle approach supports incremental rollout, aligning with business priorities rather than forcing a “big bang” change.
Why Work with an MSSP?
Some IT teams fear losing control if they outsource to a Managed Security Service Provider (MSSP). Nasstar counters this with a co-managed model, giving clients access to visibility tools and role-based controls, while providing 24/7 expert support. This ensures rapid adoption of advanced features without steep learning curves.
Industry-Specific SASE Applications
Retail: Thin-edge connectivity ensures entire store networks route securely to cloud-based point-of-sale systems, maintaining uptime for contactless and digital payments.
Manufacturing / OT: SASE enables secure IT/OT convergence, connecting factory systems to enterprise applications under a single orchestration and automation layer.
Education: With budget and skills constraints, Unified SASE reduces tool sprawl, lowers cost through consolidation, and simplifies compliance with frameworks like Cyber Essentials.
Cloud-Only vs Hybrid SASE
While Gartner’s original model envisioned cloud-only delivery, many organisations still have on-premises infrastructure. Unified SASE supports both, delivering identical policy controls via cloud Points of Presence for remote access and on-premise devices for local resources. Sovereign SASE options also address data residency and compliance requirements.
Practical First Steps
Organisations don’t need to overhaul everything at once. Common entry points include:
- WAN transformation to SD-WAN
- VPN replacement with ZTNA
- Upgrading ageing web proxies to Secure Web Gateway + CASB
- Adding security for remote internet access
A Cyber Threat Assessment can help prioritise these based on risk and business impact.
Key Takeaways
- The perimeter is gone; Zero Trust is essential.
- SASE unifies networking and security, simplifying operations and improving security posture.
- Unified SASE reduces vendor sprawl, lowers costs, and improves both user experience and team productivity.
- Adoption can be incremental — start with the highest-value transformation point.
- Working with a skilled MSSP accelerates deployment and ensures optimal configuration.
Frequently Asked Questions on Unified SASE
Q1: What is Unified SASE and how does it differ from traditional SASE?
A: Unified SASE delivers all networking and security functions — such as SD-WAN, ZTNA, Secure Web Gateway, firewall, and CASB — through a single-vendor, integrated platform. This reduces complexity and ensures consistent policy enforcement. Traditional SASE models often relied on multiple vendors and less integration.
Q2: Can Unified SASE replace my VPN?
A: Yes. The ZTNA component of Unified SASE provides more secure, context-aware access to applications than VPNs, removing broad network visibility and reducing the risk of lateral movement by attackers.
Q3: How does Unified SASE support hybrid working?
A: It ensures a consistent user experience whether employees are in the office or remote, removing the need for multiple logins or VPN clients. Policies apply equally across all locations.
Q4: Is SASE suitable for industries with strict uptime or compliance needs?
A: Yes. For example, in retail, thin-edge devices connect entire stores to secure cloud POPs to maintain payment uptime. In manufacturing, SASE supports IT/OT convergence while preserving operational continuity. Sovereign SASE deployments meet strict data residency rules for sectors like government and telecoms.
Q5: Does SASE have to be cloud-only?
A: No. While early SASE models were cloud-only, Unified SASE supports hybrid deployment — combining cloud Points of Presence for remote access with on-premises appliances for local resources.
Q6: What’s the fastest way to start adopting SASE without replacing everything?
A: Begin with high-value projects like VPN to ZTNA migration, WAN transformation to SD-WAN, or upgrading legacy web proxies. A Cyber Threat Assessment can identify the best starting point for your environment.
Q7: How can an MSSP help with SASE adoption?
A: A Managed Security Service Provider like Nasstar offers a co-managed model, giving you visibility and control while handling 24/7 monitoring, advanced feature configuration, and staged rollout.
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