Sizing a FortiGate VM in Azure for (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
| Family | Example Size | vCPUs | Memory | Best For | | :--- | :--- | :--- | :--- | :--- | | | Standard_D2s_v5 | 2 | 8 GB | General purpose – ideal for most. High CPU perf, fair price. | | D-Series v4 (Dsv4) | Standard_D4s_v4 | 4 | 16 GB | Mature, widely available, good for mid-range. | | F-Series (Fsv2) | Standard_F4s_v2 | 4 | 8 GB | CPU-optimized – excellent for IPsec VPN termination. | | E-Series (Esv5) | Standard_E4s_v5 | 4 | 32 GB | Memory-heavy – only needed for huge session tables (>2M). | | B-Series (Burstable) | Standard_B2s | 2 | 4 GB | NOT recommended for production – CPU credits run out quickly. | fortigate vm sizing azure
. 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 Sizing a FortiGate VM in Azure for (SSL/TLS
Based on the factors mentioned earlier, here are some general guidelines for sizing a FortiGate VM in Azure: High CPU perf, fair price
to protect the realm’s digital borders. Alex knew that in the cloud, picking the wrong "armor" (VM size) could lead to either a sluggish defense or a treasury drained by overprovisioning. The Foundation: Choosing the Right Series
| Mistake | Consequence | Fix | | :--- | :--- | :--- | | Using B-series VMs | Dropped packets after CPU credit exhaustion | Switch to D or F series. | | Pairing 8‑vCPU VM with VM04 license | Wasted Azure cost, no performance gain | Match vCPUs to license tier. | | Forgetting SSL inspection overhead | Throughput drops 80% unexpectedly | Double vCPUs from raw baseline. | | Deploying single VM for critical path | No HA, Azure host maintenance causes outage | A-P pair + Azure LB or FortiGate FGCP. |