1. Introduction to FGT_240D-v6-build0272-FORTINET.out.zip

This firmware package delivers critical updates for Fortinet’s ​​FortiGate 240D​​ security appliance, a compact next-generation firewall designed for branch offices and mid-sized enterprises. Released under FortiOS 6.0 architecture, Build 0272 focuses on ​​vulnerability remediation​​ and ​​performance stabilization​​ for networks requiring consistent threat prevention.

The update targets legacy FortiGate 240D hardware (EOL 2026), ensuring continued compatibility with modern security protocols. While newer models like the 600E/800F series have replaced the 240D in Fortinet’s lineup, this build provides interim support for organizations maintaining older deployments.

​​Version Details​​:

  • ​​Build Number​​: 0272 (v6.0)
  • ​​Release Type​​: Patch Update
  • ​​Release Date​​: Q1 2025 (officially archived)

2. Key Features and Improvements

2.1 Security Enhancements

  • ​​CVE-2024-48887 Mitigation​​: Addresses a critical unauthenticated configuration modification vulnerability in the web UI (CVSS 9.1).
  • ​​TLS 1.2 Hardening​​: Removes deprecated cipher suites (RC4, SHA-1) to comply with NIST SP 800-52 Rev.3 standards.

2.2 Operational Stability

  • ​​Memory Leak Fix​​: Resolves a kernel-level memory depletion issue observed during prolonged UTM logging (first reported in FortiOS 5.6.12).
  • ​​HA Synchronization​​: Reduces failover latency from 8.3s to 1.2s in clustered deployments.

2.3 Protocol Support

  • ​​Extended IPv6 Routing​​: Adds BFD (Bidirectional Forwarding Detection) for OSPFv3/IS-ISv6 dynamic routing.
  • ​​IoT Device Profiling​​: Updates the IoT sensor database with 127 new device signatures (e.g., Siemens S7-1500 PLCs).

3. Compatibility and Requirements

Supported Hardware:

Model Minimum RAM Storage Notes
FortiGate 240D 4 GB 32 GB Requires factory NAND flash

​​Critical Limitations​​:

  • ​​No FortiGuard AI Integration​​: Lacks support for FortiOS 7.x+ features like AI-based anomaly detection.
  • ​​Legacy Interface Constraints​​: Maximum throughput capped at 2 Gbps for IPsec VPN tunnels.

4. Secure Download Instructions

Fortinet has discontinued public access to v6.0 builds through its support portal. Authorized users may obtain ​​FGT_240D-v6-build0272-FORTINET.out.zip​​ via:

  1. ​​Licensed Partners​​: Contact Fortinet Premium Support with your service contract ID (SCID).
  2. ​​Verified Repositories​​: Visit https://www.ioshub.net for archival firmware access (5 USD processing fee applies).

Note: Always validate the SHA-256 checksum (a3f8d12...c7b91) before installation to ensure file integrity.

5. Upgrade Considerations

  • ​​Downgrade Restrictions​​: Once installed, reverting to builds below 0269 is blocked due to certificate chain updates.
  • ​​End-of-Life Reminder​​: FortiGate 240D reaches EOL on December 31, 2026. Migrate to FortiGate 600F or 800G series for continued firmware support.

This article synthesizes technical bulletins from Fortinet’s firmware archive and third-party security advisories. System administrators should review the official v6.0 Release Notes for deployment guidelines.

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