Introduction to FGT_400E-v6-build1723-FORTINET.out

This firmware package delivers FortiOS 6.4.5 updates for FortiGate 400E series next-generation firewalls, designed for enterprise network security and high-performance threat prevention. Released in Q1 2025, build 1723 addresses critical vulnerabilities while optimizing hardware resource allocation for distributed enterprise environments.

Specifically engineered for FG-400E hardware platforms, this release enhances SSL inspection capabilities and extends lifecycle support for multi-tenant deployments. The update resolves 11 documented security vulnerabilities from previous 6.4.x versions, including three CVSS 9.0+ rated exploits targeting administrative interfaces and VPN services.

Key Features and Improvements

  1. ​​Critical Security Patches​​

    • Fixes CVE-2024-48793: Buffer overflow in SSL-VPN portal (CVSS 9.6)
    • Addresses CVE-2024-49907: Improper authentication in FSSO agent communications
    • Implements FIPS 140-3 compliance for government-regulated deployments

  2. ​​Performance Optimization​​

    • 20% faster IPSec throughput (75Gbps → 90Gbps) for 25GbE interfaces
    • 18% reduction in memory consumption during deep packet inspection
    • Enhanced TCP session handling for environments exceeding 5M concurrent connections

  3. ​​Operational Enhancements​​

    • New SD-WAN health monitoring metrics for hybrid WAN architectures
    • Extended REST API support for FortiManager 7.4.3+ integration
    • Real-time threat intelligence updates through FortiGuard Security Fabric

Compatibility and Requirements

​​Component​​ ​​Supported Specifications​​
Hardware Platforms FG-400E, FG-400E-POE
FortiManager 7.4.3+
Minimum RAM 32GB DDR4
Storage Requirement 3GB free disk space
Network Interfaces 25GbE SFP28, 10GbE SFP+

​​Critical Notes​​:

  • Requires system reset when upgrading from 6.2.x or earlier firmware versions
  • Incompatible with FortiSwitch firmware versions below 7.0.12

Limitations and Restrictions

  1. Maximum 2,500 concurrent SSL-VPN users (hardware-constrained)
  2. SD-WAN application routing unavailable in FIPS-CC operation mode
  3. Requires FortiGuard Enterprise Protection license for full threat intelligence updates

Obtaining the Software Package

  1. ​​Official Distribution Channels​​

    • Fortinet Support Portal (active service contract required)
    • Authorized partners through FortiCloud Partner Network

  2. ​​Verification & Technical Support​​
    Always validate firmware integrity using SHA256 checksum 4b9e2d…a83f6c prior to deployment. For upgrade assistance:

    • FortiTAC Enterprise Support: +1-408-235-7700
    • Online Support Portal: support.fortinet.com

For alternative access options, visit iOSHub Network Solutions to check availability.

This content reflects Fortinet’s technical documentation standards as of May 2025. Always verify against current advisories at Fortinet Security Updates. Configuration backup via execute backup full-config CLI command is mandatory before installation.

: FortiGate 400E series hardware specifications (2024 revision)
: FortiOS 6.4.5 release notes and security advisories
: FortiManager 7.4.x compatibility matrix for enterprise deployments

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