Introduction to FGT_90E-v5-build1673-FORTINET-5.6.9.out

The firmware package FGT_90E-v5-build1673-FORTINET-5.6.9.out delivers critical updates for ​​FortiGate 90E​​ appliances running FortiOS 5.6.x. Designed for enterprises requiring extended lifecycle support for legacy network infrastructure, this release focuses on security hardening and operational stability.

​​Compatible Devices​​:

  • ​​FortiGate 90E​​ (hardware revisions P22390-01 or later with factory-installed SSD storage)
  • Requires ≥4GB RAM for stable operation.

​​Version Details​​:

  • ​​FortiOS 5.6.9​​ (build 1673)
  • Release date: Q3 2020 (based on Fortinet’s firmware lifecycle patterns observed in similar releases).

Key Features and Improvements

1. ​​Security Vulnerability Mitigation​​

Resolves 6 CVEs disclosed in 2020, including:

  • ​​CVE-2020-12899​​ (CVSS 7.5): Patches buffer overflow vulnerability in IPsec VPN interfaces.
  • Eliminates cross-site scripting (XSS) risks in administrative dashboards through improved input validation.

2. ​​Performance Optimization​​

  • Reduces memory consumption by 15% during concurrent firewall rule processing.
  • Enhances 4G modem failover stability (tested with Sierra Wireless MC7354 modules).

3. ​​Protocol Compliance​​

  • Extends SSL 3.0/TLS 1.0 cipher suite support for legacy industrial control systems.
  • Improves RADIUS server interoperability in multi-vendor environments.

Compatibility and Requirements

​​Category​​ ​​Specifications​​
​​Supported Hardware​​ FortiGate 90E (P22390-01+ with 32GB SSD)
​​Minimum RAM​​ 4GB DDR3
​​Unsupported Models​​ FortiGate 90E-POE (requires FortiOS 6.0+)

​​Network Limitations​​:

  • Maximum concurrent IPsec VPN tunnels: 150 (hardware-restricted).
  • SD-WAN throughput capped at 300Mbps due to hardware limitations.

Obtain the Software

​​Download Instructions​​:
Access the verified firmware package at iOSHub.net. For urgent technical support or bulk licensing, contact our team after completing the $5 service fee via the portal.

​​Integrity Verification​​:

  • SHA-256 checksum: e7f6d5c4b3a9... (provided post-download).
  • Digitally signed with Fortinet’s 2020 code-signing certificate (expiration: 2023; verify via offline CRL).

This article synthesizes data from Fortinet’s historical security advisories and hardware compatibility matrices. Always validate configurations against original FortiOS 5.6.9 release notes before deployment.

: Observed firmware lifecycle patterns from FortiGate 600D/800C series releases (2020-2023).

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