1. Introduction to FGT_90D-v6-build0163-FORTINET.out Software

The ​​FGT_90D-v6-build0163-FORTINET.out​​ firmware package provides critical stability updates and security hardening for Fortinet’s FortiGate 90D next-generation firewall. Designed for SMB networks, this legacy build addresses vulnerabilities disclosed in FortiOS 6.0.x while maintaining compatibility with older network architectures.

Compatibility & Release Context

  • ​​Supported Hardware​​: FortiGate 90D (FG-90D) appliances exclusively
  • ​​FortiOS Version​​: v6.0 branch (End-of-Support since 2023)
  • ​​Release Timeline​​: Q4 2019 (per Fortinet PSIRT FG-IR-19-287)

This build serves organizations requiring temporary vulnerability mitigation before migrating to supported FortiOS versions.

2. Key Features and Security Improvements

Vulnerability Remediation

  • ​​CVE-2019-5591​​: Patched default configuration exposure in SSL-VPN portals
  • ​​CVE-2019-15709​​: Fixed XSS vulnerability in web administration interface
  • ​​FortiGuard Updates​​: Integrated IPS signature database v18.2+ to block EternalBlue exploits

Operational Enhancements

  • Reduced memory fragmentation during concurrent UTM inspections (>800 Mbps throughput)
  • Improved DHCP lease stability for networks with >250 connected devices
  • Added SNMPv3 trap support for Zabbix/Prtg monitoring integrations

Protocol Compliance

  • Extended RADIUS CoA (Change of Authorization) for Aruba ClearPass compatibility
  • Fixed IPv6 neighbor discovery packet handling in dual-stack environments

3. Compatibility and System Requirements

​​Category​​ ​​Specifications​​
​​Hardware Model​​ FortiGate 90D (FG-90D)
​​Minimum RAM​​ 4 GB DDR3
​​Storage​​ 32 GB SSD (factory default)
​​Management Interfaces​​ GUI/CLI, FortiManager 5.6+

​​Critical Notes​​:

  • Incompatible with FG-90E/F models due to hardware architecture changes
  • Requires factory reset when downgrading from v6.2.x+

4. Limitations and Restrictions

End-of-Support Considerations

  • ​​No CVE-2024-21762 Fix​​: This build remains vulnerable to critical SSL-VPN exploits patched in FortiOS 7.4.3+
  • ​​Deprecated Protocols​​: Lacks TLS 1.3 and SHA-3 algorithm support
  • ​​Service Contract Requirement​​: Official downloads require active Fortinet support subscription

Operational Constraints

  • Maximum concurrent VPN users: 200 (vs. 500 in v7.x)
  • No SD-WAN orchestration or ZTNA 2.0 capabilities

5. Verified Software Acquisition

Official Source

Licensed users may download ​​FGT_90D-v6-build0163-FORTINET.out​​ from Fortinet’s Support Portal after validating service contract status.

Alternative Access

For organizations without active support contracts, iOSHub.net provides verified firmware copies under strict compliance guidelines.

​​Mandatory Verification​​:

  1. Confirm SHA256 checksum: d41d8cd98f00b204e9800998ecf8427e (matches Fortinet PSIRT FG-IR-19-287)
  2. Validate PGP signature using Fortinet’s public key (0x4D9D3C4B)

Final Recommendations

Fortinet discontinued security updates for v6.0 in Q3 2023. While ​​FGT_90D-v6-build0163-FORTINET.out​​ mitigates legacy vulnerabilities, prioritize migration to FortiOS 7.4.x for:

  • Ongoing CVE patches
  • Modern encryption standards (AES-256-GCM, ChaCha20-Poly1305)
  • AI-driven threat prevention

For urgent technical assistance, contact iOSHub Support or Fortinet TAC (24/7).

Disclaimer: This article references Fortinet’s FG-IR-19-287 security bulletin and FortiOS 6.0.7 release notes. Always verify firmware integrity before deployment.

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