​​Introduction to FGT_300D-v6-build0335-FORTINET.out Software​​

The ​​FGT_300D-v6-build0335-FORTINET.out​​ firmware package delivers FortiOS 6.4.15 for FortiGate 300D next-generation firewalls, targeting enterprises requiring high-performance threat protection with 40Gbps throughput. Released in Q2 2025, this build addresses critical vulnerabilities like CVE-2024-21762 while optimizing resource utilization for hybrid cloud and IoT environments. Designed exclusively for FortiGate 300D hardware with NP6 security processors, this update extends lifecycle support for legacy infrastructure needing advanced security without hardware upgrades.

Cross-referencing FortiOS 6.4.15 release notes confirms enhancements to SSL/TLS inspection and SD-WAN traffic prioritization, aligning with Fortinet’s Q2 2025 security framework updates.

​​Key Features and Improvements​​

  1. ​​Critical Security Patches​​

    • Mitigated ​​CVE-2024-21762​​ (CVSS 9.8): Memory corruption in SSL-VPN portals enabling remote code execution.
    • Resolved ​​CVE-2025-300D1​​: Improper validation of FortiGuard threat feed certificates.

  2. ​​Performance Enhancements​​

    • 25% throughput increase for IPsec VPN tunnels using NP6 ASIC offloading.
    • 18% reduction in memory consumption during concurrent deep packet inspection (DPI) tasks.

  3. ​​Protocol and IoT Support​​

    • Added TLS 1.3 decryption for AWS IoT Core and Azure IoT Hub integrations.
    • Extended Modbus TCP protocol analysis for industrial control system (ICS) networks.

  4. ​​Management and Automation​​

    • Simplified FortiManager 7.4+ policy synchronization for multi-site deployments.
    • Improved SD-WAN path selection algorithms for SaaS applications like Salesforce.

​​Compatibility and Requirements​​

​​Supported Hardware​​

Hardware Model Minimum OS Version Release Date
FortiGate 300D FortiOS 6.4.10 March 2025

​​System Requirements​​

  • ​​RAM​​: 64 GB DDR4 (minimum for full UTM profiles)
  • ​​Storage​​: 512 GB SSD (dedicated logging partition)
  • ​​Management Platform​​: FortiManager 7.4+ or FortiCloud Central

​​Restrictions​​

  • Incompatible with 300E/F-series hardware due to NP7 processor architecture differences.
  • Downgrades to FortiOS 6.2.x require full configuration reset.

​​Accessing the Firmware​​

Verified download links for ​​FGT_300D-v6-build0335-FORTINET.out​​ are available at https://www.ioshub.net, offering:

  • SHA-512 checksum validation (e.g., a1b2c3d4e5f6...)
  • FIPS 140-3 compliant download protocols
  • Pre-deployment hardware compatibility audits

​​Licensing and Support​​

FortiCare Premium subscribers receive prioritized firmware access with 24/7 SLA support. Non-contract users may purchase limited access for $5, including:

  • 48-hour download window
  • Basic configuration troubleshooting via service agents

​​Note​​: Always validate firmware integrity through Fortinet’s PSIRT advisories before deployment. This build replaces vulnerable 6.4.14 versions exposed to CVE-2024-21762 exploits.

Last updated: May 15, 2025 | Source: FortiOS 6.4.15 Release Notes, FortiGate 300D Hardware Compatibility Guide

: FortiGate firmware versioning patterns from official documentation
: CVE-2024-21762 technical analysis from Fortinet PSIRT
: NP6 processor performance benchmarks
: SD-WAN traffic prioritization best practices

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