Fortigate Vm Sizing Azure | Recommended & Fast

High availability across all Azure regions and predictable pricing. The High-Performance Choice: Fsv2 / F-Series

Monitor the Azure Monitor metrics for your VM instance to verify if egress network traffic is hitting the hard bandwidth ceilings imposed by the Azure VM tier.

Perimeter security, deep packet inspection, high-density IPsec VPN termination.

Allows auto-scaling FortiGate instances based on traffic demand.

A common pitfall is sizing a VM based purely on "Firewall Throughput." Enabling advanced security features introduces significant CPU overhead. fortigate vm sizing azure

In Azure, you are rarely limited by the FortiGate software capacity; you are almost always limited by the Azure Virtual Machine tier bandwidth caps.

A solid choice for standard, balanced workloads. The Dv4 and Dsv5 series are frequently used in standard FortiGate deployments .

High CPU overhead. Includes Antivirus, Sandboxing, and Web Filtering.

It is critical to match your Fortinet license with the Azure VM's vCPU count: High availability across all Azure regions and predictable

If you assign an 8‑vCPU Azure VM but purchase only a VM04 license, the FortiGate will only use 4 vCPUs. Right-size both the Azure VM and the license.

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

Azure caps the maximum aggregate egress bandwidth at the VM level. For example, a Standard_F4sv2 instance has an Azure network bandwidth limit of 4,000 Mbps (4 Gbps). Even if the FortiGate software can process 10 Gbps of pure firewall traffic, Azure will throttle the egress traffic at the hypervisor level to 4 Gbps. Always check the metric in the official Azure VM documentation. The Licensing Model (BYOL vs. PAYG)

Facing the Azure Virtual Network (VNet) spokes. A solid choice for standard, balanced workloads

Run diag hardware sys console log read to check if the system has triggered conserve mode alerts due to memory exhaustion.

Sizing a FortiGate VM on Microsoft Azure requires balancing Azure's instance performance limits with Fortinet's virtual CPU (vCPU) licensing

To get the performance you sized for, you must enable specific features:

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