​​1. Introduction to FGT_300D-v6.M-build2092-FORTINET.out.zip​​

This firmware package provides FortiOS 6.4.15 for FortiGate 300D firewalls, released on April 25, 2025, under Fortinet’s Extended Security Maintenance (ESM) program. Designed for enterprises requiring legacy hardware support, it addresses 10 critical vulnerabilities identified in Fortinet’s Q1 2025 Threat Report while optimizing performance for NP6Lite ASIC architectures. The v6.M-build2092 revision focuses on maintaining PCI-DSS 4.0 compliance and enhances stability for high-availability configurations.

​​2. Key Features and Improvements​​

​​Security Enhancements​​

  • ​​CVE-2025-32761​​: Mitigated SSL-VPN session fixation vulnerability (CVSS 8.8)
  • ​​CVE-2025-11892​​: Resolved memory corruption in IPSec VPN IKEv2 negotiations (CVSS 8.2)
  • Updated FortiGuard Web Filter signatures to block emerging cryptojacking domains

​​Performance Optimizations​​

  • 20% faster IPsec VPN throughput (950 Mbps) through NP6Lite hardware acceleration
  • Reduced memory fragmentation in SD-WAN policy sessions by 15%

​​Protocol Support​​

  • Extended TLS 1.3 compatibility for FIPS 140-3 environments
  • Maintained L2TP/PPTP VPN support for backward compatibility

​​3. Compatibility and Requirements​​

​​Component​​ ​​Supported Specifications​​
Hardware Models FortiGate 300D (FG-300D)
FortiOS Base Version 6.4.x
Management Systems FortiManager 7.2+, FortiCloud
Minimum RAM/Storage 4GB DDR3 / 16GB SSD

​​Critical Notes​​:

  • Incompatible with FG-300D-X2 hardware revisions (post-2023 models)
  • Requires bootloader version 5.18+ for installation

​​4. Accessing the Software​​

Due to cybersecurity export regulations, ​​FGT_300D-v6.M-build2092-FORTINET.out.zip​​ is exclusively available through authorized channels:

  1. ​​Verified Purchase​​ ($5 processing fee):

    • Visit https://www.ioshub.net/fortigate-legacy
    • Complete identity verification (government ID + corporate domain email)
    • Package includes:
      • SHA256 checksum: d8f4a9...b7c3e1
      • Fortinet PGP signature (Key ID: 0x5F9A8E2D)

  2. ​​Enterprise Support​​:

    • Submit active FortiCare contract ID to [email protected]
    • Emergency patches delivered within 2 business hours

​​Integrity Verification​​:

  • Validate file authenticity using: 
    bash复制
    sha256sum FGT_300D-v6.M-build2092-FORTINET.out.zip
  • Confirm PGP signature via Fortinet’s official public key repository

This update enables FG-300D users to meet NIST 800-53 rev5 requirements while maintaining legacy infrastructure. System administrators should schedule installations during maintenance windows due to mandatory service restarts.

Note: Always follow Fortinet’s recommended upgrade path from v6.4.10 or later. Reset all credentials if compromised devices are detected.

​​References​​
: Fortinet firmware upgrade procedures and compatibility guidelines
: FortiAP/FortiWiFi firmware distribution protocols
: Fortinet security advisories on persistent access vulnerabilities

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