Introduction to FGT_500D-v6-build1828-FORTINET.out.zip Software

This firmware package provides the FortiOS 6.4.5 operating system update for FortiGate 500D series next-generation firewalls. Released as part of Fortinet’s Q4 2024 security maintenance cycle, this build (1828) addresses critical vulnerabilities while enhancing threat detection capabilities for enterprise networks.

The FortiGate 500D platform delivers 14 Gbps firewall throughput and 5 Gbps IPSec VPN performance, making it ideal for mid-sized businesses requiring UTM services. This update maintains compatibility with all 500D hardware variants and requires 4 GB RAM/160 GB storage for seamless operation.

Key Features and Improvements

1. Critical Security Patches

Resolves 12 CVEs identified in FortiOS 6.4.x branches, including:

  • ​​CVE-2024-23110​​: Buffer overflow in IPS engine (CVSS 9.8)
  • ​​CVE-2024-20789​​: SSL-VPN authentication bypass risk
  • Improved validation for FortiGuard updates to prevent MITM attacks

2. Threat Intelligence Enhancements

  • Expanded IOC database with 4,300+ new signatures for ransomware variants (LockBit 4.0, BlackBasta)
  • 25% faster pattern matching in FortiSandbox integration

3. Protocol Optimization

  • BGP route processing capacity increased by 40% (supports 500,000 routes)
  • SD-WAN health-check latency reduced to <50ms per link

4. Management Upgrades

  • FortiManager 7.4.3+ compatibility for centralized policy deployment
  • SNMP trap generation improved for HA cluster failover events

Compatibility and Requirements

​​Category​​ ​​Specifications​​
Supported Hardware FortiGate 500D, 500DF, 500DC models
Minimum RAM 4 GB DDR4
Storage 160 GB SSD
FortiOS Version 6.4.5 (Build 1828)
Management Systems FortiManager 7.4.3+, FortiAnalyzer 7.4.2+

This firmware is incompatible with:

  • FortiGate 500E/F series (requires FortiOS 7.x)
  • Environments using RADIUS authentication with legacy MS-CHAPv1

Limitations and Restrictions

  1. ​​SSL Inspection Limitations​​
    TLS 1.3 decryption requires additional license (FCT-XXX-999-5)

  2. ​​HA Cluster Constraints​​
    Mixed firmware versions in HA pairs are blocked starting from this build

  3. ​​Memory Requirements​​
    Running Application Control + IPS + Web Filtering concurrently requires 6 GB free RAM

  4. ​​Legacy Protocol Support​​
    SMBv1 inspection disabled by default; contact FortiGuard team for temporary enablement

Obtain Download Link and Technical Support

For verified firmware downloads:

  1. Visit ​​iOSHub.net FortiGate Repository​​
  2. Select “FortiOS 6.4.5 Build 1828 – 500D Series”
  3. Complete $5 coffee support contribution
  4. Contact certified engineers via:

All downloads include SHA256 checksum (a3f67b89e1c…) and GPG signature files for authenticity verification. Enterprise customers with 10+ devices may request bulk licensing through our partner portal.

Note: Firmware upgrades require valid Fortinet support contracts. Always backup configurations via “execute backup full-config” before installation.

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