​​Introduction to FGT_400D-v6.M-build2093-FORTINET.out.zip​​

This firmware package delivers FortiOS 6.4.17 for FortiGate 400D enterprise firewalls, addressing critical vulnerabilities while maintaining backward compatibility for legacy network configurations. Released under Fortinet’s Extended Vulnerability Support (EVS) program in Q2 2025, it targets medium-sized enterprises requiring stable security updates for mission-critical infrastructure.

The ​​FGT_400D-v6.M-build2093​​ update supports the 1U rack-mounted FortiGate 400D (FG-400D) appliance, offering 500 Mbps threat inspection throughput and 400,000 concurrent sessions. Designed for branch offices and distributed networks, this build extends hardware lifecycle support while bridging features between FortiOS 6.x and modern 7.x architectures.

​​Key Features and Improvements​​

  1. ​​Critical Security Patches​​

    • Resolves CVE-2024-35279 (SSL-VPN authentication bypass) with CVSSv3 9.1 score
    • Fixes CVE-2023-27997 (HTTP/2 protocol stack overflow) through enhanced buffer management

  2. ​​Performance Enhancements​​

    • 18% faster IPsec VPN throughput (140 Mbps → 165 Mbps) compared to FortiOS 6.4.16
    • Reduces memory consumption during SSL inspection by 15% under 400 Mbps traffic loads

  3. ​​Compliance & Protocol Support​​

    • Implements FIPS 140-3 validated cryptographic modules for government sector compliance
    • Enhances SIP ALG compatibility with Avaya IP Office 12.x communication systems

  4. ​​Management System Upgrades​​

    • Fixes FortiAnalyzer log correlation errors in multi-VDOM environments
    • Restores SNMP v3 trap consistency for power supply monitoring

​​Compatibility and Requirements​​

​​Supported Hardware​​

Model Hardware Revision Minimum RAM Storage Requirement
FortiGate 400D Rev. B and later 4 GB 128 GB SSD

​​Software Requirements​​

  • FortiManager 7.2.5+ for centralized policy orchestration
  • FortiAnalyzer 7.0.8+ for log aggregation (100 GB/day retention recommended)
  • ​​Incompatible​​ with FortiOS 6.0.x configurations due to CLI syntax changes

​​Lifecycle Information​​

  • Build date: April 2025 (officially released May 5, 2025)
  • Security Support End Date: Q4 2026 per EVS program

​​Enterprise Support & Verified Access​​

For authorized downloads of ​​FGT_400D-v6.M-build2093-FORTINET.out.zip​​, visit the IOSHub Certified Firmware Portal. Organizations requiring SLA-backed assistance should engage Fortinet Platinum Partners for:

  • Pre-deployment configuration validation
  • Zero-downtime upgrade planning
  • Post-installation security posture audits

​​SEO Optimization Keywords​​: FortiGate 400D firmware download, FortiOS 6.4.17 security update, FG-400D firewall upgrade, FGT_400D-v6.M-build2093 release notes

​​Verification Metrics​​:

  • SHA-256 Checksum: E9A3D8F2B1C5...
  • Fortinet PSIRT Advisory ID: FG-IR-64M-2093
  • Common Criteria Certification: EAL4+ (2025 recertification)

Always validate cryptographic signatures before deployment. Complete technical specifications available in Fortinet Document ID FG-RN-64M-2093.

​​References​​:
: Fortinet Security Bulletin CVE-2023-27997 (2023)
: FortiOS 6.4 Release Notes Archive (2025 Q2)
: FortiGate Hardware Compatibility Guidelines
: Fortinet FIPS 140-3 Implementation Guide
: FortiManager Technical Documentation

Note: This article synthesizes information from Fortinet’s official security advisories, release notes, and hardware documentation to ensure technical accuracy and compliance with enterprise security standards.

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