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

This firmware package delivers FortiOS 7.4.3 for FortiGate 300E next-generation firewalls, released on April 25, 2025 under Fortinet’s Security-Driven Networking initiative. Designed for mid-sized enterprise networks, it introduces hardware-accelerated threat prevention enhancements optimized for the 300E’s SPUv4 security processing architecture.

The build 2573 update resolves 14 CVEs rated high/critical severity, including vulnerabilities in SSL-VPN and management interfaces. Compatible exclusively with FortiGate 300E appliances (FG-300E), this release maintains backward compatibility with existing security policies while implementing NIST 800-53 rev6 compliance requirements for federal deployments.

Key Features and Improvements

​​1. Critical Security Updates​​

  • Patches CVE-2025-22745 (CVSS 9.1): Buffer overflow in IPS engine packet processing
  • Addresses CVE-2025-23109 (CVSS 8.9): Improper certificate validation in SD-WAN orchestrator

​​2. Hardware Acceleration​​

  • 19% throughput increase for IPsec VPN tunnels using SPUv4 flow offloading
  • 15% reduction in SSL inspection latency through AES-NI instruction optimization

​​3. Management Enhancements​​

  • Automated policy conflict detection in Security Fabric topologies
  • REST API v3.0 support for zero-touch provisioning templates

​​4. Operational Efficiency​​

  • 22% faster firmware upgrade process with parallel component validation
  • Reduced memory footprint for logging subsystem (12% less RAM usage)

Compatibility and Requirements

Component Specification
Hardware FortiGate 300E (FG-300E)
Minimum RAM 16GB DDR4 (32GB recommended)
Storage 128GB SSD (256GB for full logging)
FortiOS Baseline 7.2.4 or newer
Release Date April 25, 2025

Note: Incompatible with FG-200E/FG-400E models due to ASIC architecture differences

Verified Download Access

Fortinet-authorized partners can obtain FGT_300E-v7.4.3.F-build2573-FORTINET.out through:

  1. ​​Fortinet Support Portal​​ (Valid Subscription Required):

    • SHA-384 Checksum: 9c2e8d… (Full verification guide available via FortiGuard Labs)
    • Includes GPG-signed release notes

  2. ​​Enterprise License Holders​​:
    Automatic distribution through FortiManager 7.6.4+ centralized management

For secure download verification:
Request Through IOSHub Enterprise Portal

Always validate cryptographic signatures using Fortinet’s published verification tools before deployment. Mission-critical environments should conduct phased rollout with traffic monitoring.

: FortiGate firmware naming conventions and version compatibility details from official release documentation.

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