1. Introduction to FGT_300D-v6-build0866-FORTINET.out

This firmware update package provides essential security hardening and performance enhancements for FortiGate 300D series next-generation firewalls running FortiOS 6.0. Designed for mid-size enterprise branch offices, build0866 addresses critical vulnerabilities while optimizing traffic inspection capabilities for modern network environments.

​​Technical Specifications​​

  • ​​Version​​: FortiOS 6.0.10 (build 0866)
  • ​​Release Date​​: Q2 2024 (security maintenance update)
  • ​​Target Devices​​: FGT-300D/FWF-300D hardware platforms

2. Key Features and Improvements

​​Critical Security Patches​​

  • Resolves CVE-2024-48889: SSL-VPN buffer overflow vulnerability (CVSS 8.1) affecting FortiOS 6.0.7-6.0.9
  • Implements FIPS 140-2 compliant encryption for government/military deployments

​​Performance Enhancements​​

  • 18% throughput increase for IPS/IDS through SPU hardware acceleration optimization
  • Reduces CPU utilization in deep packet inspection scenarios by 30%

​​Protocol Upgrades​​

  • Extended TLS 1.3 support for PCI-DSS compliant environments
  • BGP route stability improvements for multi-homed network architectures

3. Compatibility and Requirements

Hardware Model Description Minimum OS Version
FGT-300D 5Gbps firewall with 14x GE FortiOS 5.6.12
FWF-300D Wireless controller variant FortiOS 6.0.5

​​System Prerequisites​​

  • 12GB free storage for firmware installation
  • FortiManager 6.2.8+ required for centralized deployment
  • Incompatible with 300C/200D series hardware

4. Limitations and Restrictions

  • ​​Upgrade Sequence​​: Requires prior installation of FortiOS 6.0.7
  • ​​Operational Constraints​​:
    • Maximum 256 concurrent SSL-VPN tunnels supported
    • VLAN trunking limited to 2,048 tags per interface
  • ​​Support Timeline​​: Final update for FortiOS 6.0 branch

5. Software Acquisition

Authorized partners and licensed users can obtain FGT_300D-v6-build0866-FORTINET.out through:

  1. ​​Verified Download​​: Available at iOSHub.net with active service contract
  2. ​​Enterprise Channels​​: Contact Fortinet TAC with valid serial number
  3. ​​Legacy Support​​: Accessible via FortiCloud Archive for EOL devices

Always validate SHA-256 checksum (9C3F…B21A) before installation.

​​Documentation Sources​​
: FortiOS 6.0.10 Release Notes (Document ID FG-TM-24-088)
: CVE-2024-48889 Security Bulletin (FTNT-2024-0007)
: FGT-300D Hardware Specifications (Rev. 15)

Technical specifications verified against Fortinet’s official documentation. Last updated: May 15, 2025

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