Fortigate Vm Sizing Azure [ iPhone TRUSTED ]

Sizing a FortiGate VM in Azure for Deep Inspection (SSL/TLS decryption) is CPU-intensive and requires careful alignment between Azure instance capabilities and Fortinet licensing. For reliable performance with deep inspection enabled, a minimum of 4 GB RAM is recommended. Core Sizing Considerations

CPU Impact: Deep packet inspection (DPI) and SSL/TLS inspection significantly increase CPU load. For example, one user's browsing and file downloading can consume up to 12% of a single CPU core when deep inspection is active.

NIC Limitations: Azure limits the number of Network Interfaces (NICs) based on the VM size. D2/D2v2: Supports only 2 NICs. D4/D4v2: Supports up to 8 NICs.

Accelerated Networking: For high-throughput requirements, ensure the chosen VM size supports Accelerated Networking (SR-IOV) to reduce CPU overhead for networking tasks. Recommended Azure Instance Types

FortiGate supports various instance families, primarily leveraging Compute Optimized (F-series) or General Purpose (D-series). Feature Need Recommended Azure Series Standard DPI D-Series (e.g., D2s_v3, D4s_v3) Good balance of compute and memory for general UTM tasks. High Performance DPI F-Series (e.g., F4s, F8s)

Higher CPU-to-memory ratio, ideal for compute-heavy SSL inspection. Scalability VMSS (Scale Sets)

Allows auto-scaling FortiGate instances based on traffic demand. Licensing vs. VM Size

It is critical to match your Fortinet license with the Azure VM's vCPU count:

FortiGate VM sizing for MS Azure - explicit proxy, full UTM, ssl deep inspeciton, ICAP

Optimizing Network Security: A Guide to FortiGate-VM Sizing in Microsoft Azure

Deploying a FortiGate Next-Generation Firewall (NGFW) in Microsoft Azure requires a strategic approach to "right-sizing" to balance high-performance security with cloud cost-efficiency. Unlike physical appliances with fixed hardware, a FortiGate-VM’s power is determined by the Azure instance type it runs on and the Fortinet license applied to it. 1. Understanding the Licensing-Instance Link

Sizing begins with the vCPU count. FortiGate-VM licenses (e.g., VM-02, VM-04, VM-08) dictate the maximum number of vCPUs the software will utilize. While you can technically deploy a 2-vCPU license on an 8-vCPU Azure instance, the firewall will only use 2 cores for traffic processing.

BYOL (Bring Your Own License): Offers flexibility to choose specific vCPU/RAM ratios.

PAYG (Pay-As-You-Go): Often bundled with specific instance sizes in the Azure Marketplace. 2. Selecting the Right Azure VM Family

Not all Azure VM series are optimized for network security tasks. The most common choices include:

Compute-Optimized (F-Series): Ideal for high-throughput firewalling and IPsec VPNs. The Fsv2-series is frequently recommended for its high CPU-to-NIC ratio, which is crucial for complex HA (High Availability) setups requiring multiple interfaces.

General Purpose (D-Series): A balanced choice for standard workloads. The Dv4 and Dv5 series (e.g., Standard_D2s_v5) are common benchmarks in Fortinet datasheets.

Memory-Optimized (E-Series): Use these if you are running memory-intensive features like heavy SSL inspection, Proxy mode, or large-scale ZTNA (Zero Trust Network Access). A minimum of 4 GB RAM is recommended for stable operation. 3. Key Performance Enablers

To reach the multi-gigabit speeds advertised in datasheets, two Azure-specific features are non-negotiable:

Accelerated Networking (SR-IOV): This bypasses the virtual switch for direct host-to-NIC communication, drastically reducing latency and CPU overhead. It is available on most instances with 2 or more vCPUs.

Network Interface (NIC) Limits: Azure limits the number of NICs based on the VM size. If your design requires separate management, sync, and multiple traffic interfaces, you must select an instance size that supports at least 4 NICs. FortiGate VM on Microsoft Azure Data Sheet - Fortinet

Sizing a FortiGate VM on Azure requires balancing three critical factors: FortiOS license limits, Azure VM NIC limits, and your performance throughput needs. 1. Determining the Minimum Size

While FortiOS can run on small instances, enable at least 4 GB of RAM for proper operation, especially if you plan to use UTM (Unified Threat Management) or Proxy features.

NIC Constraints: A common "gotcha" is that Azure limits the number of Network Interface Cards (NICs) based on VM size. For a standard Active-Passive HA setup, you typically need at least 4 NICs (Management, Untrust, Trust, HA sync).

Minimum for 4 NICs: You generally need at least an 8-vCPU instance like the Standard_F8s_v2 or Standard_D3_v2 to support 4 network interfaces.

Version-Specific IPS: Starting with FortiOS 7.4.0, if you want to use the full "extended IPS database," Fortinet recommends a minimum of 8 vCPUs. 2. Recommended Azure Instance Families Best Use Case Recommended Models F-Series (Compute Optimized)

High throughput, IPS, and SSL inspection. Often the best price-to-performance ratio for firewalls. Standard_F4s_v2, Standard_F8s_v2 D-Series (General Purpose)

Balanced workloads or when more RAM is needed for heavy logging/reporting. Standard_D2s_v5, Standard_D4s_v5 3. Licensing vs. Azure Size

In public clouds, Fortinet licensing only restricts the number of vCPUs you can use.

The VM size determines the number of ______ that you can create for a VM

Right-Sizing Your FortiGate VM in Microsoft Azure: A Practical Guide Deploying a FortiGate Next-Generation Firewall (NGFW)

in Azure is a smart move for hybrid and cloud-native security, but "guessing" your VM size can lead to either expensive over-provisioning or sluggish performance bottlenecks. To build a secure, efficient environment, you need to align your Azure VM SKU with your specific traffic needs and FortiOS licensing. 1. Match the VM Series to Your Workload fortigate vm sizing azure

Azure offers various VM families, but not all are created equal for high-performance security. Dv5 and Dsv5-Series (General Purpose):

These are the modern standards for FortiGate deployments. They include Accelerated Networking

by default, which is essential for low-latency traffic processing. F-Series (Compute Optimized):

Ideal if you are running heavy inspection services like deep-packet SSL inspection or high-volume IPS, where raw CPU speed is the priority. A-Series (Entry Level):

Generally avoided for production due to limited Network Interface Card (NIC) support and lower throughput. 2. The NIC Bottleneck: More Than Just Speed One of the most overlooked aspects of Azure sizing is NIC limits

. In Azure, the number of virtual interfaces you can attach is strictly tied to the VM size. Small instances (e.g., 2 vCPUs) often only support

, which can be restrictive if you need separate interfaces for Management, WAN, LAN, and HA Heartbeat. Larger instances

are required if your architecture demands multiple segmented subnets or a complex Hub-and-Spoke design. 3. Aligning with FortiGate Licensing

Your sizing decision must sync with your licensing model to avoid "dead" resources. Pay-As-You-Go (PAYG):

The most flexible option. You are charged based on the Azure instance size, and the license scales automatically as you resize the VM. Bring Your Own License (BYOL):

Licenses are typically sold by vCPU count (e.g., VM-02, VM-04, VM-08). If you license a (2 vCPUs) but deploy it on a Standard_D4s_v5 (4 vCPUs), the FortiGate will only utilize 2 of those CPUs , wasting half of your Azure compute costs. 4. Performance Expectations

While Azure doesn't provide "official" benchmark tools, real-world testing and community data suggest general targets: Throughput:

Larger VM sizes generally support higher network bandwidth. For example, some older v2 instances surprisingly support higher throughput (up to 1500 Mbps) compared to certain v4 variants (800 Mbps) due to Azure's internal throttling policies. RAM Usage: Aim for at least 4GB to 8GB

of RAM. Smaller instances with only 2GB or 4GB may struggle if you enable multiple UTM features (Antivirus, IPS, and Application Control). 5. Resizing Best Practices

Sizing FortiGate-VM on Microsoft Azure: A Comprehensive Guide

Sizing a FortiGate-VM in Microsoft Azure is a critical balance between required security performance and cloud infrastructure costs. Because Azure instances have varying limits on CPU, memory, and network interfaces (NICs), choosing the wrong "shape" can throttle your firewall’s throughput even if your license allows for more. 1. Key Performance Drivers in Azure

When sizing your instance, performance is determined by more than just raw CPU count. You must consider:

vCPU and RAM: Fortinet recommends at least 4 GB of RAM for proper operation, especially if you enable Unified Threat Management (UTM), ZTNA, or proxy features.

Accelerated Networking: This Azure feature is essential for high throughput. It offloads network processing to dedicated hardware (FPGA), significantly reducing latency and jitter. Ensure your chosen Azure size supports it.

vSPU Technology: FortiGate-VM uses Virtual Security Processing Units (vSPUs) to offload packet processing from the kernel, which can triple firewall throughput for UDP traffic. 2. Choosing the Right Azure Instance Family

FortiGate-VM supports several Azure instance families, each suited for different use cases: Instance Family Best Use Case Notable Limits Compute Optimized (F-Series) High-performance firewalling, IPS, and SSL inspection.

Often has lower NIC counts (e.g., F1/F2 may only support 2 NICs). General Purpose (D-Series)

Standard web filtering, VPN gateways, and general segmentation.

Balanced CPU/RAM; widely available across all Azure regions. ARM64 (Ampere Altra)

Cost-efficient high performance for specific modern workloads. Requires specific ARM64 FortiOS images. 3. Licensing vs. Azure Sizing

There are two primary ways to license your FortiGate-VM, and each impacts how you size the underlying VM: FortiGate VM on Microsoft Azure Data Sheet - Fortinet

Mastering FortiGate VM Sizing on Azure: A Complete Guide Choosing the right size for your FortiGate VM on Microsoft Azure is a critical balancing act between security performance and cost optimization. Unlike physical appliances, virtual machines (VMs) share hardware resources, meaning your choice of Azure VM instance series directly impacts throughput, latency, and your firewall’s overall efficacy. 1. Understanding Azure VM Series for FortiGate

Azure offers several VM families, but not all are suited for high-performance security inspection.

F-Series (Compute-Optimized): Generally recommended for FortiGate because they offer a higher NIC-to-CPU ratio, which is essential for network-heavy workloads.

D-Series (General Purpose): A solid choice for standard, balanced workloads. The Dv4 and Dsv5 series are frequently used in standard FortiGate deployments.

Accelerated Networking: To avoid performance bottlenecks, ensure your chosen size supports Accelerated Networking. This offloads packet processing from the CPU to the NIC, drastically reducing latency and jitter. 2. Matching FortiGate Licenses to Azure Sizes Sizing a FortiGate VM in Azure for Deep

FortiGate VM licenses are typically tiered by the number of virtual CPUs (vCPUs) they support. Sizing your Azure instance without matching your license will lead to wasted resources. License Model vCPU Range Typical Azure Instance VM-01S Standard_D2s_v5 (throttled) VM-02S up to 2 vCPUs Standard_F2s_v2 or D2s_v5 VM-04S up to 4 vCPUs Standard_F4s_v2 or D4s_v5 VM-08S up to 8 vCPUs Standard_F8s_v2 or D8s_v5

Pro Tip: If you use Bring Your Own License (BYOL), you can upgrade from a VM-01S to a VM-02S and then resize the Azure VM to match the new vCPU count within minutes. 3. Critical Sizing Constraints

When selecting your size in the Azure Marketplace, keep these three technical limits in mind:

Network Interfaces (NICs): The number of interfaces you can attach is strictly limited by the VM size. A single FortiGate instance often requires at least four NICs (Management, External, Internal, and HA Sync).

Memory Requirements: While FortiGate-VM can run on as little as 2 GB of RAM, features like Intrusion Prevention (IPS) and Antivirus are memory-intensive. For production, aim for at least 4 GB to 8 GB to ensure the system doesn't enter conserve mode.

Throughput vs. Packet Size: Official Fortinet datasheets often list performance for large packets (1518 bytes). If your traffic is dominated by small packets (e.g., VoIP or DNS), you will need a larger VM size than the datasheet suggests to handle the higher packet-per-second (PPS) rate. 4. Deployment Strategies for Scalability

If a single VM isn't enough, consider these advanced architectures: FortiGate VM on Microsoft Azure Data Sheet - Fortinet

Sizing Your FortiGate VM in Azure: A Comprehensive Guide Deploying a FortiGate Next-Generation Firewall (NGFW)

on Microsoft Azure is a powerful way to secure your cloud workloads. However, unlike physical appliances with fixed specs, "sizing" in the cloud is a balancing act between Azure instance limits Fortinet licensing

This guide breaks down how to choose the right VM size to ensure peak performance without overspending.

1. The Two Pillars of Sizing: Azure SKU vs. FortiGate License

When you size a FortiGate VM, you must satisfy two different sets of constraints: Azure Instance Limits: Each Azure VM size (e.g., Standard_F4s ) has a hard cap on the number of Network Interfaces (NICs) and raw CPU/RAM. FortiGate License Limits: If you use Bring Your Own License (BYOL) , your license (e.g.,

) limits how many vCPUs the FortiOS software will actually use.

You can run a 2-vCPU license on an 8-vCPU Azure VM if you need more NICs, but the FortiGate will only use 2 of those CPUs for traffic processing. 2. Recommended Azure Instance Families For security appliances, Fortinet generally recommends Compute-Optimized General-Purpose instances.

Sizing a FortiGate-VM in Azure requires balancing Azure's virtual machine performance with Fortinet's licensing tiers. Because Azure throttles network throughput based on the instance size, choosing a VM with enough vCPUs and RAM is critical for security performance. 1. Minimum Requirements

While a FortiGate-VM can technically run on 1 vCPU and 2 GB of RAM, these specs are generally reserved for evaluation or light testing.

Recommended Minimum: At least 4 GB of RAM is recommended for stable operation, especially if you enable features like Unified Threat Management (UTM), Zero Trust Network Access (ZTNA), or Proxy.

Storage: Most deployments start with 32 GB of disk space, expandable up to 2 TB for logging and reporting. 2. Selecting the Right Azure Instance Series

The "Series" you choose in Azure dictates the underlying hardware and network bandwidth.

Compute-Optimized (F-Series): High-performance instances (e.g., Standard_F2, Standard_F4) are often preferred for firewall workloads because they offer a high CPU-to-NIC ratio and strong compute power for packet inspection.

General Purpose (D-Series): These (e.g., Standard_D2s_v5, Standard_D4s_v5) are balanced options. However, be aware that throughput can vary significantly; for example, some users prefer older v2 instances over newer ones because of specific Azure bandwidth allocations.

Accelerated Networking: Crucial. Ensure your chosen VM size supports Accelerated Networking, which offloads networking tasks from the CPU to the hardware, significantly reducing latency and jitter. 3. Aligning with FortiGate Licenses

Your Azure VM resources must not exceed your Bring Your Own License (BYOL) limits, or you will waste compute power. FortiGate VM on Microsoft Azure Data Sheet - Fortinet

FortiGate-VM Sizing Guide for Microsoft Azure

Version: 2024 Standards Scope: Infrastructure Architects, Security Engineers, Cloud Administrators

Scenario 3: Data Center Egress + East-West Inspection (Hub VNet)

• Traffic: 5 Gbps peak to internet. Plus 10 Gbps of VM-to-VM inspection inside Azure. 5M sessions.
• Compute: Stateful 5+10 = 15 Gbps raw. Derate 40% = 25 Gbps needed from datasheet. That’s FG-VM32 territory.
• Azure instance: D32s_v3 or M32ms (memory-intensive). Use Availability Zones for HA.
• Cost warning: This VM alone costs >$2,000/month + licensing. Consider splitting east-west inspection to separate FortiGate scale set.

4 Key Metrics You Must Calculate

3. Licensing Impacts on Sizing

Fortinet licensing is strictly tied to vCPU count. This creates a "Tax" on oversizing.

• BYOL (Bring Your Own License): If you size a VM too large (e.g., 16 vCPU) but only push 500 Mbps of traffic, you are wasting money on the license. Fortinet licenses are sold in tiers (2 vCPU, 4 vCPU, 8 vCPU, etc.). Size precisely to your traffic needs.
• PAYG (Pay As You Go): The hourly cost rises significantly with larger instances. Unlike BYOL, you can resize PAYG instances easily (shut down, resize, start), but it disrupts traffic.

A. Entry Level (Small Branch / Test / Dev)

• Target Throughput: < 1 Gbps
• License: VM01 / VM02
• Recommended Azure Sizes:
  • Standard_D2s_v3 (2 vCPU, 8GB RAM) – Standard for VM01.
  • Standard_D2s_v4 / v5 – Newer generations, slightly better network burst.

3. Recommended Azure VM Series for FortiGate

Not all Azure VM families work well for firewalls. The following are field-proven:

| Azure Series | Characteristics | Best For | |--------------|----------------|-----------| | Dv5 / Dsv5 (General purpose) | Balanced compute & memory, good for most inspection workloads | Mixed firewall + IPS + SSL inspection (500 Mbps – 2 Gbps) | | Ev5 / Esv5 (Memory optimized) | Higher memory-to-vCPU ratio | Large NAT tables, millions of sessions, VPN termination | | Fsv2 (Compute optimized) | High clock speed (3.4+ GHz) | Low-latency, high-packet-rate environments (e.g., gaming, trading) | | Dasv5 (AMD EPYC) | Cheaper per core, good sustained performance | Cost-sensitive production deployments |

Avoid: Burstable B-series (unpredictable under load), older A-series (low network performance).

9. Final Recommendation

• Start with D4sv5 (4 vCPU, 16 GB) + BYOL for most production workloads under 1 Gbps with inspection.
• Use PAYG only for POCs or sub-500 Mbps needs – it’s easier but more costly and limited.
• Always enable accelerated networking and monitor via FortiView in the GUI.

For environments above 2 Gbps, consider FortiGate-VM with vSRX or native Azure Firewall Premium for cost comparison – FGT-VM often wins on features but not always on raw Azure throughput.

Note: Always refer to the latest Fortinet Azure Sizing Guide (FortiOS 7.4+) and Microsoft’s VM documentation, as both companies update performance data quarterly.

Sizing a FortiGate VM on Microsoft Azure requires balancing Azure's instance performance limits with Fortinet's virtual CPU (vCPU) licensing FortiGate-VM Sizing Guide for Microsoft Azure Version: 2024

. The primary consideration is ensuring the chosen Azure instance size provides enough vCPUs and RAM to match your FortiGate license, while also offering sufficient Network Interface Cards (NICs) for your topology. Microsoft Learn 1. Choosing Your Licensing Model

Your licensing choice directly impacts how you scale your VM in the future. Microsoft Learn

Resizing an Azure FortiGate VM instance - Fortinet Community 20 Jun 2023 —

White Paper: FortiGate-VM Sizing and Performance in Microsoft Azure Executive Summary

Selecting the correct virtual machine (VM) size for a FortiGate-VM in Azure is critical for balancing security performance with operational costs. This paper outlines the key technical considerations, licensing models, and recommended instance types to ensure an optimized deployment. 1. Core Performance Drivers

FortiGate-VM performance in Azure is primarily determined by three factors: vCPU count, RAM, and the specific Azure VM family architecture. vCPU Scaling

: FortiOS is highly parallelized. Adding vCPUs directly increases throughput for compute-intensive tasks like IPS, Antivirus, and SSL Inspection. Memory Requirements : A minimum of

is strongly recommended for production environments, especially when enabling Unified Threat Management (UTM) or Proxy features. Smaller sizes (e.g., 1 vCPU / 1 GB RAM) are generally restricted to lab or testing environments and may require deployment via VHD rather than the Azure Marketplace. Accelerated Networking

: For high-bandwidth requirements, select Azure VM sizes that support Accelerated Networking

(e.g., Dv2, Dv3, F-series). This feature reduces latency and CPU overhead by utilizing SR-IOV. 2. Recommended Azure VM Families

Azure offers several VM series optimized for different FortiGate use cases: Deploy Fortigate VM Free in Azure on Low End Free Tier VPS

FortiGate VM Sizing in Azure: A Comprehensive Guide

As organizations increasingly move their workloads to the cloud, ensuring the security and integrity of their infrastructure becomes a top priority. FortiGate, a leading network security appliance, offers a virtual machine (VM) solution that can be deployed in Azure to provide robust security features. However, to ensure optimal performance and efficiency, it's crucial to properly size the FortiGate VM for your Azure environment. In this article, we'll delve into the key considerations and best practices for FortiGate VM sizing in Azure.

Understanding FortiGate VM

FortiGate VM is a virtualized version of the FortiGate network security appliance, which provides a comprehensive range of security features, including firewall, intrusion prevention, antivirus, and more. The VM can be deployed on various platforms, including Azure, to provide security and protection for cloud-based infrastructure.

Why Proper Sizing is Important

Proper sizing of the FortiGate VM is essential to ensure that it can handle the required network traffic and security workloads. Undersizing the VM can lead to performance issues, packet loss, and decreased security effectiveness, while oversizing can result in unnecessary costs. Therefore, it's crucial to carefully evaluate your Azure environment and security requirements to determine the optimal FortiGate VM size.

Factors to Consider for FortiGate VM Sizing in Azure

When sizing a FortiGate VM in Azure, several factors need to be taken into account:

1. Network Traffic Volume: The amount of network traffic that needs to be processed by the FortiGate VM is a critical factor in determining its size. Consider the total amount of traffic that will be flowing through the VM, including incoming and outgoing traffic.
2. Security Features: The type and number of security features enabled on the FortiGate VM will also impact its sizing. For example, if you plan to enable features like intrusion prevention, antivirus, and SSL decryption, you may require a larger VM size.
3. Throughput Requirements: The throughput requirements of your Azure environment will also influence the sizing of the FortiGate VM. Consider the required throughput in terms of Mbps or Gbps.
4. Number of Users and Devices: The number of users and devices that will be connecting to your Azure environment will also impact the sizing of the FortiGate VM.
5. Azure VM Instance Types: Azure offers various VM instance types, each with its own set of resources and performance characteristics. Choose an instance type that aligns with your FortiGate VM requirements.

Azure VM Instance Types for FortiGate VM

Azure offers several VM instance types that can be used for FortiGate VM deployment. Some of the most common instance types include:

1. A-Series: General-purpose VMs with a balance of CPU, memory, and storage resources.
2. D-Series: High-performance VMs with a focus on CPU and memory resources.
3. E-Series: High-memory VMs with a focus on memory-intensive workloads.
4. F-Series: High-performance VMs with a focus on CPU and storage resources.

FortiGate VM Sizing Guidelines

Based on the factors mentioned earlier, here are some general guidelines for sizing a FortiGate VM in Azure:

1. Small Environments: For small environments with low traffic volumes (up to 100 Mbps), a FortiGate VM with 2-4 vCPUs and 4-8 GB of memory may be sufficient.
2. Medium Environments: For medium environments with moderate traffic volumes (100-500 Mbps), a FortiGate VM with 4-8 vCPUs and 8-16 GB of memory may be required.
3. Large Environments: For large environments with high traffic volumes (500-2000 Mbps), a FortiGate VM with 8-16 vCPUs and 16-32 GB of memory or more may be necessary.

Best Practices for FortiGate VM Deployment in Azure

To ensure optimal performance and security, follow these best practices when deploying a FortiGate VM in Azure:

1. Use Azure Resource Manager (ARM) Templates: Use ARM templates to deploy and configure your FortiGate VM, which provides a standardized and repeatable deployment process.
2. Configure High Availability: Configure high availability (HA) for your FortiGate VM to ensure that your security infrastructure remains operational even in the event of a failure.
3. Monitor Performance: Continuously monitor the performance of your FortiGate VM and adjust its size or configuration as needed to ensure optimal performance.
4. Take Advantage of Azure Security Features: Take advantage of Azure security features, such as Network Security Groups (NSGs) and Azure Firewall, to provide additional security and protection for your infrastructure.

Conclusion

Proper sizing of a FortiGate VM in Azure is crucial to ensure optimal performance, security, and efficiency. By considering factors such as network traffic volume, security features, throughput requirements, and Azure VM instance types, you can determine the optimal FortiGate VM size for your Azure environment. By following best practices for deployment and configuration, you can ensure that your FortiGate VM provides robust security and protection for your cloud-based infrastructure.

FortiGate VM Sizing Tools and Resources

To help with FortiGate VM sizing, Fortinet provides several tools and resources:

1. FortiGate VM Sizing Tool: A web-based tool that helps you determine the optimal FortiGate VM size based on your specific requirements.
2. Fortinet Azure Marketplace: A marketplace where you can deploy FortiGate VM instances in Azure, with pre-configured sizes and configurations.
3. Fortinet Documentation: Extensive documentation on FortiGate VM deployment and configuration in Azure, including best practices and sizing guidelines.

By leveraging these tools and resources, you can ensure that your FortiGate VM is properly sized and configured to meet the security needs of your Azure environment.