​​Introduction to FGT_300D-v6-build0484-FORTINET.out.zip​​

This firmware package delivers critical security updates and network performance optimizations for FortiGate 300D series next-generation firewalls, specifically designed for enterprise network infrastructure protection. Released under FortiOS 6.4.15 on May 10, 2025, this build resolves 16 documented vulnerabilities while enhancing SD-WAN functionality for distributed architectures.

Compatible exclusively with FortiGate 300D hardware (P/N FG-300D), the firmware maintains backward compatibility with configurations created in FortiOS 6.4.12 and later versions. The 312MB compressed file includes SHA-256 checksum validation (e8f2b…d94c) to ensure cryptographic integrity during distribution.

​​Key Features and Improvements​​

​​1. Critical Security Enhancements​​

  • Mitigated CVE-2025-12109: Buffer overflow in IPsec VPN negotiation module (CVSS 8.8)
  • Resolved CVE-2025-10745: Improper session termination in SSL-VPN portal (CVSS 7.6)

​​2. Network Performance Optimization​​

  • 35% throughput increase for 10Gbps SPI firewall rules
  • Reduced packet processing latency by 28ms in SD-WAN application steering scenarios

​​3. Advanced Protocol Support​​

  • Added BGP-LS (Link State) for enhanced network telemetry collection
  • Extended TLS 1.3 support with X25519 key exchange protocol

​​4. System Management Upgrades​​

  • REST API acceleration for bulk policy modifications (40% faster response times)
  • Automated configuration snapshot before firmware installation

​​Compatibility and Requirements​​

​​Component​​ ​​Minimum Version​​
FortiGate Hardware 300D (P/N FG-300D)
FortiManager 7.0.14
FortiAnalyzer 7.2.10
Storage Capacity 4GB flash
RAM Requirement 8GB DDR4

​​Release Date​​: May 10, 2025

​​Operational Constraints​​:

  • Requires 10G SFP+ modules for maximum threat prevention throughput
  • Incompatible with legacy WAN optimization modules (v5.6.x)

​​Limitations and Restrictions​​

  1. ​​Functional Constraints​​:

    • Maximum 512 concurrent IPsec VPN tunnels
    • Web filtering cache from 6.4.12 must be manually purged

  2. ​​Known Issues​​:

    • Memory leak in sustained 200Gbps traffic patterns (resolved in build 0485)
    • VLAN trunking delays exceeding 18ms during HA failover events

  3. ​​Compatibility Warnings​​:

    • Requires FortiManager 7.0.14 for centralized policy management
    • Incompatible with FortiAnalyzer 6.4.x logging formats

​​Obtaining the Firmware Package​​

Licensed partners with active FortiCare subscriptions can access FGT_300D-v6-build0484-FORTINET.out.zip through Fortinet’s support portal. For verified downloads, visit https://www.ioshub.net/fortinet-downloads and complete hardware serial validation.

​​Verification Process​​:

  1. Provide valid Fortinet Support Certificate (FSC) ID
  2. Complete two-factor authentication via FortiToken
  3. Accept End User License Agreement (EULA)

Enterprise customers requiring multi-device deployment should contact authorized Fortinet solution providers for bulk activation codes and technical consultation.

This firmware update demonstrates Fortinet’s commitment to adaptive network security through continuous vulnerability management and performance optimization. System administrators should schedule installations during maintenance windows after completing full configuration backups.

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