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FortiGate 91E USG End of Life

Understand when support ends and how to future-proof your FortiGate 91E USG End of Life deployment.

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The FortiGate-91E-USG has reached end of life and administrators should schedule an orderly upgrade. As a higher-capacity branch/edge appliance, replacing the 91E-USG offers an opportunity to improve SD-WAN, inspection, and management capabilities while maintaining service continuity.

What this means for your organization

  • A chance to modernize your security posture and prepare for future growth.
  • Opportunity to benefit from improved performance, efficiency, and protection.
  • Align IT infrastructure with compliance, scalability, and long-term ROI.
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FortiGate-91E-USG Date & Status

Here’s what you need to know about FortiGate-91E-USG lifecycle status.

  • End of Life (EOL): 1/14/25
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FortiGate-91E-USG Replacement

Replacing the FortiGate-91E-USG enables larger branches and small campuses to maintain consistent performance and visibility across cloud-heavy traffic patterns.

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Role of the FortiGate-91E-USG:

A mid-range edge device for larger branches and small campuses with firewall, VPN, and SD-WAN features.

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Evolving Traffic Patterns:

Cloud-bound traffic and remote services increase demand for robust TLS inspection and consistent policy enforcement.

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Modern Demands:

Unified edge platforms with advanced SD-WAN, real-time telemetry, cloud integration, and centralized policy management are required.

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Strategic Upgrade:

Adopt modern edge appliances or cloud-integrated security stacks with strong SD-WAN, better visibility, and simplified operations.

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Understanding Fortinet's EOL Policy | End of Life Risks

Every Fortinet product follows a defined lifecycle, moving through the following stages:

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  • General Availability (GA): The product is released and actively sold and supported.
  • End of Sale (EOS): The device is no longer available for purchase from Fortinet or authorized partners.
  • End of Life (EOL): Feature development and most firmware updates stop.
  • End of Support (EOSL): Fortinet ends all official support, security patches, and RMA services.

Why This Matters for Your Business

Understanding where your hardware sits in this lifecycle helps you:

  • Plan timely upgrades before critical support ends.
  • Ensure security compliance and avoid audit failures.
  • Maintain operational continuity with fully supported hardware.
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Risks of Continuing to Use EOL Hardware

When a firewall or security appliance reaches End of Life, the risks of keeping it in production increase dramatically

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No Security Patches

Outdated devices won’t receive updates, leaving your network exposed to new vulnerabilities.

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Lack of Vendor Support

Once support ends, there’s no access to Fortinet’s technical resources or RMA services.

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Compliance Failures

Auditors may flag unsupported hardware as a violation of security and industry standards.

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Operational Instability

Legacy devices may struggle with modern workloads, encrypted traffic, and cloud integrations.

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How Aseva Helps with Fortinet EOL

Here’s how Aseva ensures a smooth and secure FortiGate lifecycle transition.

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Lifecycle Planning:

Track Fortinet GA → EOS → EOL → EOSL.

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Seamless Migration:

Dedicated engineers ensure minimal downtime.

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Future-Proof Security:

Replace with next-gen models aligned to your needs.

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Why Choose Aseva for Fortinet End of Life Support?

Choosing the right partner is critical. With Aseva, you gain a trusted advisor with deep expertise in Fortinet and broader cybersecurity lifecycle management. We help reduce risk, ensure compliance, and maximize ROI on your IT investments.

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