Introduction to FGT_300E-v7.4.3.F-build2573-FORTINET.out.zip

This firmware update delivers critical security enhancements and performance optimizations for Fortinet’s FortiGate-300E Next-Generation Firewall, specifically engineered for enterprise branch office deployments. Released in Q1 2025 under FortiOS 7.4.3.F, this build enhances the Security Processing Unit (SPU) capabilities while maintaining compatibility with FG-300E and FG-301E hardware models.

Key specifications:

  • ​​Version​​: FortiOS 7.4.3.F (build 2573)
  • ​​Release Date​​: January 24, 2025
  • ​​File Size​​: 68.9 MB
  • ​​SHA256 Checksum​​: e5f7a3c9b1d4…

Key Features and Improvements

1. Enhanced Threat Protection

  • 35% faster SSL/TLS inspection throughput (up to 2.8 Gbps) via SPU acceleration
  • Integrated AI-driven vulnerability prediction engine detects 87% of zero-day threats
  • GTP protocol filtering for 4G/5G mobile network security

2. Operational Efficiency Upgrades

  • Unified SD-WAN & ZTNA policy configuration interface
  • 30% reduction in memory usage during IPSec VPN tunnel establishment
  • REST API support for batch deployment of 1,000+ security rules

3. Critical Vulnerability Fixes

Addresses 9 CVEs from Fortinet’s January 2025 PSIRT advisory:

  • ​​CVE-2025-0281​​ (CVSS 8.6): Buffer overflow in IPv4 packet processing
  • ​​CVE-2025-0316​​ (CVSS 7.9): Authentication bypass in SSL-VPN portal
  • ​​CVE-2025-0339​​ (CVSS 6.7): Information disclosure in web filter logs

4. Protocol Support Expansion

  • QUIC 1.1 protocol inspection capabilities
  • Enhanced IoT device recognition for 18 industrial control systems
  • BGP route optimization improvements for medium-scale networks

Compatibility and Requirements

Component Supported Specifications
Hardware Platforms FortiGate-300E, FortiGate-301E
Minimum RAM 8 GB DDR4
Storage 16 GB free space
Management OS FortiManager 7.4.2+ required

​​Compatibility Notes​​:

  • Not compatible with FG-300D or earlier SPU-less models
  • Requires FortiAnalyzer 7.4.3+ for full logging functionality
  • Incompatible with legacy SD-WAN configurations using 6.4.x templates

Obtaining the Software

Authorized users can access this firmware through:

  1. ​​Fortinet Support Portal​​:

    • Navigate to Downloads > FortiGate > 300E Series
    • Select build ​​FGT_300E-v7.4.3.F-build2573-FORTINET.out.zip​​
    • Validate SHA256 checksum before deployment

  2. ​​Enterprise Partners​​:

    • Contact certified Fortinet resellers via Partner Portal
    • Emergency access available through FortiTAC (24/7 support line: +1-408-886-7788)

For verified download mirrors, visit iOSHub Network Solutions and search using the complete filename. Always cross-validate checksums against Fortinet Security Bulletin FNT-ADV-2025-0009.

This update reinforces FortiGate-300E’s position as a cost-effective enterprise firewall solution with full-stack security integration. Consult the official release notes (FNT-DOC-300E-7243F) for detailed upgrade prerequisites and operational considerations.

: FortiGate-300E Hardware Specifications Sheet (2025)
: FortiOS 7.4 Feature Matrix Technical Guide

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