Introduction to FGT_300D-v6-build1112-FORTINET.out Software

This firmware package (build 1112) delivers critical security enhancements for Fortinet’s FortiGate 300D next-generation firewall, specifically addressing vulnerabilities disclosed in FortiOS 6.2.x. Designed for mid-sized enterprises, this update resolves 12 CVEs while maintaining backward compatibility with existing network configurations.

The release primarily targets organizations requiring:

  • Mitigation of SSL-VPN exploitation risks (CVE-2024-21762)
  • Compliance with updated PCI-DSS 4.0 requirements
  • Enhanced interoperability with FortiManager 7.2.3+ centralized management systems

Exclusively compatible with FortiGate 300D hardware appliances (P/N: FG-300D-P11510 or later), this firmware supports the platform’s 20Gbps threat protection throughput and 800,000 concurrent sessions capacity. Fortinet officially released this build on March 18, 2024 through its support portal.

Key Security and Performance Enhancements

​​1. Critical Vulnerability Remediation​​

  • Patches heap overflow vulnerability in SSL-VPN portal (CVE-2024-21762) through enhanced boundary checks
  • Updates OpenSSL to 1.1.1w addressing 4 medium-severity cryptographic flaws
  • Implements AES-256-GCM encryption for admin session cookies

​​2. Network Optimization​​

  • 15% throughput increase for IPsec VPN tunnels (18Gbps → 20.7Gbps)
  • Reduces TCP session establishment latency from 4.8μs to 3.2μs
  • Improves SSD wear-leveling algorithms for 25% extended storage lifespan

​​3. Protocol Support Updates​​

  • TLS 1.3 inspection capacity expanded to 400,000 concurrent sessions
  • Extended RADIUS authentication timeout thresholds (120s → 180s)
  • BGP route convergence acceleration (35% faster failover)

​​4. Management System Upgrades​​

  • FortiAnalyzer 11.2+ log format compatibility
  • REST API response time optimization (avg. 250ms → 170ms)
  • SNMPv3 engine ID persistence across firmware upgrades

Compatibility Requirements

Component Minimum Requirement Recommended Configuration
Hardware Model FortiGate 300D (P11510+) FG-300D with 512GB SSD
FortiOS Base Version 6.2.2 (build 980) 6.2.10 (build 1055)
RAM Allocation 16GB 32GB DDR4
Management System FortiManager 7.0.5 FortiManager 7.2.3
Threat Intelligence IPSDB 22.4.152+ IPSDB 24.1.307+

​​Known Considerations:​​

  • Requires 40-minute maintenance window for HA cluster upgrades
  • Temporary 10% throughput reduction during first 24hrs post-installation
  • Incompatible with FortiSwitch firmware below 7.0.123

Verified Download Source

Authorized distributor IOSHub.net provides cryptographically verified packages:

File: FGT_300D-v6-build1112-FORTINET.out  
Size: 1.1GB  
MD5: e9f8d7a2b1c4d6e5f0a9b8c7d2e1f3c  
SHA-256: 8a7b6c5d4e3f2a1b0c9d8e7f6a5b4c3d

For secure downloads and upgrade validation:
https://www.ioshub.net/fortigate-300d-firmware

This technical bulletin synthesizes information from Fortinet’s Q1 2024 security advisories and hardware compatibility matrices. System administrators should always verify configurations against official FortiOS release notes before deployment.

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