Securing the Hybrid Edge: An Overview of Fortinet FortiSASE
With the rise of hybrid workforces and highly distributed application environments, traditional perimeter-based security architectures are no longer sufficient. When users, devices, and applications are everywhere, routing all traffic back to a central corporate data center for inspection introduces severe bottlenecks, latency issues, and security gaps.
To address this shift, organizations are turning to Secure Access Service Edge (SASE). Fortinet’s cloud-delivered SASE offering, FortiSASE, is a unified solution that converges networking and security to deliver consistent, AI-powered protection for users both on- and off-network.
Let’s take a closer look at what FortiSASE is, how it works, and how it aligns with Zero Trust principles.
What is FortiSASE?
FortiSASE is Fortinet’s Secure Access Service Edge platform. A major differentiator for FortiSASE is that it is built on FortiOS—the same operating system that runs Fortinet’s industry-leading physical FortiGate firewalls.
By leveraging a single operating system across hardware, software, and cloud-delivered services, Fortinet enables organizations to apply identical security policies, threat intelligence, and management workflows whether a user is sitting in a corporate office behind a physical firewall or working from a coffee shop connected to the cloud.
Core Security Capabilities (SSE)
FortiSASE integrates a comprehensive Security Service Edge (SSE) stack into a single, cloud-delivered platform. The core pillars of this stack include:
- Secure Web Gateway (SWG): Protects web-facing traffic with advanced web filtering, URL categorization, and DNS security. It shields remote users from malicious websites and controls access to unauthorized web resources.
- Zero Trust Network Access (ZTNA): Replaces legacy, wide-open VPN connections with granular, identity- and context-aware access to internal applications. Posture checks run continuously to verify device health before granting access.
- Cloud Access Security Broker (CASB): Secures data and transactions within SaaS environments. It prevents data leakage and ensures compliance by monitoring user actions in popular cloud apps like Microsoft 365 and Salesforce.
- Firewall-as-a-Service (FWaaS): Provides next-generation firewall capabilities (NGFW) in the cloud. It inspects all non-web traffic, block threats, and enforces application control protocols.
- Remote Browser Isolation (RBI): Sandboxes web browsing sessions in the cloud. It prevents untrusted web content and scripts from ever reaching the user’s endpoint, mitigating browser-based exploits.
Key Use Cases
FortiSASE breaks down its connectivity and security goals into three primary use cases:
1. Secure Internet Access (SIA)
For general web browsing and internet use, FortiSASE routes remote user traffic through a nearby cloud security point of presence (PoP). There, the full force of the unified security stack—backed by real-time threat intelligence from FortiGuard Labs—inspects traffic for malware, phishing, and command-and-control communication.
2. Secure Private Access (SPA)
When users need to access corporate applications hosted in private data centers or public clouds, FortiSASE uses its native ZTNA functionality. Instead of establishing a full VPN tunnel that exposes the entire subnet, FortiSASE creates secure per-session tunnels directly to the specific applications the user is authorized to access.
3. Secure SaaS Access (SSA)
To prevent Shadow IT and secure sensitive corporate data stored in SaaS applications, FortiSASE uses inline and API-based CASB. This allows administrators to monitor SaaS usage, prevent unapproved applications, and enforce Data Loss Prevention (DLP) rules.
Flexible Deployment Options
One size rarely fits all when it comes to enterprise environments. FortiSASE accommodates this by offering multiple connection options:
- Agent-based Access: Remote employees use the FortiClient agent, which handles endpoint posture checks, manages ZTNA client connections, and redirects web traffic to the SASE cloud.
- Agentless / Proxy-based Access: Ideal for contractors, partners, or unmanaged personal devices (BYOD). Access is secured via web browser extensions or secure proxy settings, ensuring security without requiring software installation.
- Thin Edge / SD-WAN Integration: Integrates natively with FortiGate SD-WAN appliances at branch offices. The branch firewall securely forwards internet-bound traffic directly to the nearest FortiSASE PoP, eliminating the need for costly backhaul.
Zero Trust Alignment
At its core, FortiSASE is a vehicle for enforcing Zero Trust. By combining continuous device health monitoring, user identity verification (supporting multi-factor authentication), and application-level micro-segmentation, it realizes the principal tenet of modern security: Never Trust, Always Verify.
Whether you’re starting your Zero Trust journey or seeking to unify a fragmented array of point-security products, FortiSASE offers a scalable, robust pathway to secure your hybrid workforce.