FortiWeb 400F
500 Mbps of HTTP throughput with full WAF inspection
- HTTP throughput
- 500 Mbps
- Form factor
- Rackmount
The FortiWeb 400F delivers 500 Mbps of HTTP throughput, defending web applications and APIs against the OWASP Top 10, bot traffic, credential stuffing and API abuse, attacks that arrive as legitimate HTTPS and pass a network firewall untouched.
Five times the 100F's throughput and the first model with fibre uplinks, which matters more than the raw number: 500 Mbps covers a handful of business applications rather than one. Still no hardware bypass, so it belongs behind a load balancer or in a reverse-proxy topology rather than inline on a single critical path. The step to the 600F is the one to consider if inline deployment is likely.
How to work out whether it fits
The arithmetic a datasheet leaves out. If any of it does not match your situation, that is worth a call rather than a guess.
Five hundred megabits covers a handful of business applications comfortably, or one busy public site with headroom. The practical planning number is concurrent connections rather than raw throughput: TLS termination and inspection both cost per connection, so a site with many long-lived sessions will feel the ceiling before the bandwidth figure suggests. If the deployment is inline rather than reverse-proxy, skip to the 600F for the bypass pair, retrofitting resilience after an outage is not a good look.
What to order alongside the FortiWeb 400F
The published threat protection figure for this model is measured with IPS, application control and malware protection all running. Those arrive as a FortiGuard subscription, so the bundle you choose decides whether the hardware can reach the number you sized it on. Every bundle already includes FortiCare Premium 24x7 support.
| Bundle | What it adds | 1 yearlist price | 3 yearslist price | 5 yearslist price |
|---|---|---|---|---|
| Enterprise ProtectionENT | The broadest bundle. Everything in UTP, plus the services that cover data, SaaS posture and attack-surface visibility, plus inline zero-day malware prevention. | on quote | on quote | on quote |
| Unified Threat ProtectionUTP | The traditional mid-tier: perimeter defence covering network, file, web and email threats. Everything most sites actually switch on. | on quote | on quote | on quote |
| Advanced Threat ProtectionATP | The narrow bundle: IPS and the full malware stack including cloud sandboxing, without the web and email filtering layers. | on quote | on quote | on quote |
These are Fortinet list prices. You will not pay them.
Every quote we write is discounted from list, and how far below depends on quantity, term and whether we register the deal with Fortinet. Longer terms also price better per year, which is why three and five year bundles are usually the better buy on a device you intend to keep through a refresh cycle. Part numbers follow Fortinet’s standard bundled convention; not every model carries every combination, so we confirm the exact orderable SKU before anything is placed.
FortiWeb 400F is number 2 of 7 in this family
Ranked on throughput, the figure that separates these models. All values are Fortinet’s own and cited on each product page.
FortiWeb 100F
100 Mbps
400% less than the FortiWeb 400F. Worth it only if your measured requirement genuinely fits inside it.
FortiWeb 400F
500 Mbps
7 models in this family span 100 Mbps to 70 Gbps.
FortiWeb 600F
1 Gbps
100% more headroom. Worth costing if you expect growth inside the refresh cycle, replacing early is dearer than buying up once.
Highlights
- 500 Mbps HTTP throughput
- Machine-learning behaviour model, not signatures alone
- API schema validation and rate limiting
- Compact inline or reverse-proxy deployment
Typical deployments
- A small estate of internal and external web applications
- Organisations consolidating several unprotected apps behind one WAF
- Reverse-proxy deployments where the WAF is not a single point of failure
The numbers, with their conditions
Every figure below is Fortinet's own, with the test conditions it was measured under.
Performance
| Throughput (HTTP) | 500 Mbps |
|---|
Hardware
| Total interfaces | 4x GE RJ45, 4x GE SFP |
|---|
Sources
- Fortinet Product Matrix (July 2026), retrieved 2026-09-01
- Fortinet Partner Portal price list, retrieved 2026-09-01
Reproduced from Fortinet published documentation and subject to change without notice. Where a figure is load-bearing for your design, ask us to confirm it in writing before you order; we will.