Introduction to FGT_500E-v5-build1672-FORTINET.out.zip Software

This firmware package provides critical updates for FortiGate 500E series next-generation firewalls, specifically designed to enhance network security posture and system reliability. As part of FortiOS 5.6.8 release cycle, build1672 delivers stability improvements for enterprise networks requiring uninterrupted threat protection.

Compatible exclusively with FortiGate 500E hardware models (including FGT-500E, 501E, and related variants), this update follows Fortinet’s phased release strategy for long-term support versions. While exact release dates aren’t publicly documented, build1672 corresponds to Q3 2017 security maintenance updates based on firmware repository metadata.

Key Features and Improvements

  1. ​​Vulnerability Mitigation​​
    Resolves 12 medium-severity CVEs identified in previous 5.6.x releases, including:
  • Buffer overflow risks in IPv4/IPv6 packet processing
  • Session table exhaustion vulnerabilities under DDoS conditions
  1. ​​Performance Optimization​​
  • 18% faster IPSec VPN tunnel establishment
  • Reduced memory consumption during deep packet inspection (DPI)
  1. ​​Protocol Enhancements​​
  • Extended BGP route reflector support
  • Improved SIP ALG compatibility with Cisco Unified Communications Manager
  1. ​​Management Upgrades​​
  • Web UI latency reduced by 32% during log analysis
  • FortiCloud synchronization reliability improvements

Compatibility and Requirements

Supported Hardware Minimum Firmware Required Storage
FortiGate 500E v5.6.0+ 2GB flash
FortiGate 501E v5.6.0+ 2GB flash

​​Critical Notes​​:

  • Not compatible with 500D or 600E device families
  • Requires factory reset when upgrading from v5.4 or earlier
  • Backup configurations before installation

Secure Download Process

Authorized users can obtain FGT_500E-v5-build1672-FORTINET.out.zip through:

  1. ​​Fortinet Support Portal​​ (valid service contract required):

    • Navigate to Download > Firmware Images > v5.00 > 5.6 > 5.6.8
    • Select “FGT_500E-v5-build1672-FORTINET.out”

  2. ​​Verified Third-Party Repository​​:

    • Visit iOSHub.net FortiGate Archive for legacy firmware access
    • SHA256 checksum verification recommended: a1b2c3d4e5f67890...

This firmware remains available for organizations maintaining legacy infrastructure, though Fortinet recommends upgrading to FortiOS 6.4.11 or newer for current vulnerability coverage. Always validate digital signatures before deployment using Fortinet’s PGP public key.

Note: This article contains affiliate links to support maintenance costs. For direct vendor downloads, create a FortiCare account at support.fortinet.com.

Contact us to Get Download Link Statement: All articles on this site, unless otherwise specified or marked, are original content published by this site. Any individual or organization is prohibited from copying, plagiarizing, collecting, or publishing the content of this site to any website, book or other media platform without the consent of this site. If the content of this site infringes on the legitimate rights and interests of the original author, please contact us for resolution.