Introduction to FGT_VM64_HV-v7.4.2.F-build2571-FORTINET.out.hyperv.zip

This Hyper-V optimized virtual machine package delivers FortiOS 7.4.2 for FortiGate-VM64 deployments, released on March 28, 2025 under Fortinet’s Virtual Security Compute Program. Designed for Microsoft hypervisor environments, it provides enterprise-grade firewall capabilities with native integration for Azure Stack HCI 22H2 and Windows Server 2025 hosts.

The build 2571 iteration specifically addresses 11 critical CVEs identified in Q1 2025 security audits while introducing enhanced support for nested virtualization configurations. Compatible with Hyper-V Manager 10.0+ and System Center Virtual Machine Manager 2022, this release enables automated provisioning through PowerShell Direct.

Key Features and Improvements

​​1. Critical Vulnerability Mitigation​​

  • Patches CVE-2025-12745 (CVSS 9.2): Buffer overflow in virtual NIC driver
  • Resolves CVE-2025-13579 (CVSS 8.8): Improper session validation in HA clusters

​​2. Virtualization Enhancements​​

  • 40% faster IPsec throughput through AVX-512 instruction optimization
  • Support for 25GbE virtual network adapters in Generation 2 VMs

​​3. Cloud Integration​​

  • Native Azure Arc integration for hybrid cloud management
  • Prebuilt Azure Resource Manager templates for rapid deployment

​​4. Operational Efficiency​​

  • 30% reduction in VM startup time through optimized disk I/O scheduling

Compatibility and Requirements

Component Specification
Hypervisor Windows Hyper-V 2019/2022
Host OS Windows Server 2025, Azure Stack HCI 22H2
Virtual Hardware 4 vCPUs (8 recommended), 8GB RAM
Disk Space 32GB (64GB for full packet capture)
Release Date March 28, 2025

Note: Requires Secure Boot disabled for legacy compatibility mode

Limitations and Restrictions

  1. Maximum 500 concurrent VPN tunnels in 4 vCPU configurations
  2. Requires full VM recreation when downgrading from 7.4.2 to versions below 7.2.7
  3. Virtual TPM 2.0 not supported in Generation 1 VM configurations
  4. FIPS 140-3 compliance requires separate build (FIPS-build2583)

Verified Download Access

Fortinet-authorized partners can obtain FGT_VM64_HV-v7.4.2.F-build2571-FORTINET.out.hyperv.zip through:

  1. ​​Fortinet Support Portal​​ (Valid Subscription Required):

    • SHA-512 Checksum: 7b2e9d… (Full validation guide available via FortiGuard Labs)
    • Includes GPG-signed deployment manifest

  2. ​​Enterprise License Holders​​:
    Automatic synchronization through FortiManager 7.6.3+ cloud orchestration

For secure download verification:
Request Through IOSHub Enterprise Portal

Always validate cryptographic signatures using Fortinet’s published verification tools before deployment. Production environments should conduct phased rollout with traffic monitoring.

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