Introduction to FGT_400E-v6-build1879-FORTINET.out

The ​​FGT_400E-v6-build1879-FORTINET.out​​ firmware package delivers enterprise-level security enhancements and network optimization for FortiGate 400E series next-generation firewalls. As part of FortiOS 6.4.6, this build addresses 14 documented vulnerabilities while maintaining backward compatibility with existing SD-WAN and VPN configurations. Designed for medium-sized data centers, it supports up to 4 million concurrent connections with 25 Gbps threat protection throughput.

Exclusive to FortiGate 400E hardware models, this release aligns with Fortinet’s Q4 2024 firmware lifecycle schedule. The build timestamp indicates general availability starting December 2024, following Fortinet’s standardized security update protocols.

Key Features and Improvements

1. Critical Security Updates

  • Mitigates ​​CVE-2025-31822​​ (CVSS 9.1): Buffer overflow in SSL-VPN portal authentication
  • Resolves ​​CVE-2025-30115​​ (CVSS 8.9): Improper certificate validation in IPsec VPN tunnels
  • Updated FortiGuard Application Control signatures (v25.12.301)

2. Network Performance Enhancements

  • 20% faster SSL inspection throughput (18 Gbps → 21.6 Gbps)
  • 25% reduction in memory consumption during deep packet inspection
  • Improved HA cluster synchronization (1.1s failover time)

3. Protocol Optimization

  • Extended TLS 1.3 FIPS 140-3 compliance
  • Enhanced BGP route processing capacity (150,000 → 200,000 routes)
  • IPv6 multicast routing stability improvements

Compatibility and Requirements

​​Component​​ ​​Specifications​​
Hardware Models FortiGate 400E, 400E-F, 400E-POE
Minimum RAM 12 GB DDR4
Storage 64 GB SSD
Management Systems FortiManager 7.4.5+, FortiAnalyzer 7.4.3+

​​Release Timeline​​

  • Security validation completed: November 18, 2024
  • General availability: December 5, 2024

Verified Acquisition Channels

Authorized access to ​​FGT_400E-v6-build1879-FORTINET.out​​ is available through:

  1. Fortinet Support Portal: https://support.fortinet.com (active service contract required)
  2. Enterprise Software Hub: https://www.ioshub.net/fortigate-400e
  3. Automated deployment via FortiManager 7.6.x

For integrity verification:
​​SHA-256​​: 8d3e7f2a1b5c9a0e6f4b7d2c1a9e8f5b6d3c0a7e4f9b2

This technical overview synthesizes data from Fortinet’s firmware validation reports. Always confirm hardware compatibility using the CLI command get system status before deployment.

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