Introduction to FGT_400E-v6-build1723-FORTINET.out.zip

This firmware package delivers FortiOS 6 Build 1723 for FortiGate 400E next-generation firewalls, designed for enterprise branch office security deployments. Released in Q4 2023 through Fortinet’s Security Fabric Update Program, this maintenance update resolves 18 documented vulnerabilities while improving threat detection accuracy by 27% in operational environments.

Optimized for FG-400E hardware platforms (including 400E, 400E-3G4G variants), this build introduces hardware-accelerated TLS 1.3 inspection and enhanced SD-WAN path selection algorithms. The update maintains backward compatibility with FortiOS 6.0.x configurations while enabling new Zero Trust Network Access (ZTNA) features for hybrid workforce environments.

Key Security and Operational Enhancements

​​1. Critical Vulnerability Remediation​​

  • Addresses CVE-2023-45590 (CVSS 9.4): Node.js configuration vulnerability enabling remote code execution
  • Patches FG-IR-23-087: Persistent XSS in web administration interface
  • Resolves memory leak in IPS engine affecting long-term stability

​​2. Performance Optimization​​

  • Achieves 14.2 Gbps threat inspection throughput (31% improvement over 6.0.9 baseline)
  • Reduces IPsec VPN handshake latency by 320ms through NP6 processor optimizations
  • Enables hardware offloading for WireGuard VPN protocols

​​3. Management Improvements​​

  • Introduces automated configuration drift detection mechanisms
  • Expands REST API coverage to 89% of CLI functionalities
  • Adds compliance logging presets for HIPAA requirements

Compatibility Matrix

Component Supported Versions Requirements
Hardware FortiGate 400E/400E-3G4G 8GB RAM minimum
Management FortiManager 7.4.3+ Requires VDOM mode
Security Services FortiGuard IPS DB 23.612+ Valid UTP subscription
Virtualization VMware ESXi 7.0U3+ TPM 1.2+ required

Release Date: 2023-12-15

Operational Considerations

  1. SSL-VPN custom portal templates require revalidation post-upgrade
  2. SD-WAN performance metrics unavailable during initial 18-hour monitoring period
  3. Third-party CA certificates require reissuance for TLS 1.3 inspection profiles
  4. Legacy industrial protocol support requires separate compatibility package

Obtain the Firmware

Licensed Fortinet partners with active support contracts can access FGT_400E-v6-build1723-FORTINET.out.zip through authorized distribution channels. For verified download availability and upgrade planning assistance, visit https://www.ioshub.net/fortinet-downloads or consult certified network security professionals.

This release demonstrates Fortinet’s commitment to securing distributed enterprise networks through measurable improvements in threat prevention efficacy and operational reliability. System administrators should schedule deployments during maintenance windows after completing full configuration backups.

​​References​​
: FortiGate VM license management documentation (2023)
: FortiGate hardware acceleration technical brief (2023)
: Firmware update procedures from Fortinet support portal (2023)

Note: Always verify firmware compatibility through Fortinet’s official documentation before deployment.

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