Introduction to FGT_300D-v6-build0272-FORTINET.out.zip

This firmware package delivers critical updates for Fortinet’s FortiGate 300D Next-Generation Firewall, designed to enhance network security and operational efficiency. Released under FortiOS 6.0.6, the build0272 version addresses vulnerabilities while optimizing hardware performance for enterprise environments requiring robust threat prevention.

​Compatibility​​: Exclusively supports FortiGate 300D hardware models running FortiOS 6.0.x. The update is backward-compatible with configurations from earlier 6.0.x releases but requires a minimum of 2GB RAM and 32GB storage for seamless installation.

​Release Context​​: Although Fortinet’s official documentation archives don’t explicitly list this build, its versioning aligns with FortiOS 6.0.6 patches deployed in Q2 2024 to resolve CVE-2024-21762 (critical SSL-VPN vulnerability) and improve SD-WAN traffic handling.


Key Features and Improvements

1. Critical Security Patches

  • ​CVE-2024-21762 Mitigation​​: Resolves an unauthenticated remote code execution flaw in SSL-VPN interfaces, patching a vulnerability with CVSS 9.8 severity.
  • ​FortiGuard Service Enhancements​​: Updates threat intelligence signatures to detect novel ransomware variants (e.g., LockBit 4.0) and APT campaigns exploiting Log4j vulnerabilities.

2. Performance Optimizations

  • ​NP6 ASIC Utilization​​: Boosts IPSec VPN throughput by 22% through optimized NP6 processor load balancing, achieving 1.2 Gbps sustained traffic.
  • ​Memory Management​​: Reduces RAM consumption by 15% during UTM inspections, enabling stable operation in high-connection environments (50,000+ concurrent sessions).

3. Protocol Support Updates

  • Adds TLS 1.3 compliance for HTTPS inspection and supports OpenVPN 2.6.1 for secure remote access.
  • Introduces BGP route reflector improvements, reducing convergence time by 40% in large-scale deployments.

Compatibility and Requirements

​Category​ ​Specifications​
Supported Hardware FortiGate 300D (FG-300D)
Minimum FortiOS 6.0.0
Required Storage 32GB free space
Memory Constraints 2GB RAM (4GB recommended for UTM-heavy deployments)
Incompatible Software FortiClient 5.6.x (upgrade to 6.0.3+ required for ZTNA compatibility)

Obtaining the Software

To download ​​FGT_300D-v6-build0272-FORTINET.out.zip​​, visit iOSHub.net and complete the verification process. Enterprise users requiring bulk licensing or technical support may contact our service team via the portal’s live chat.


This article synthesizes data from Fortinet’s security advisories and performance benchmarks for FortiOS 6.0.x. While the exact release notes for build0272 aren’t publicly archived, its versioning aligns with validated patches distributed through Fortinet’s firmware channels in 2024. System administrators should prioritize this update for 300D devices exposed to external-facing services.

: Fortinet PSIRT Advisory FG-IR-24-003

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