Fortinet · High-end FortiGate
Fortinet FortiGate 3500G
The Fortinet FortiGate 3500G is a rackmount firewall that runs FortiOS. Fortinet publishes a firewall throughput of 595 / 590 / 420 Gbps and a threat protection throughput of 105 Gbps for it. It has 2 x 400GE QSFP-DD, 4 x 100GE QSFP28, 30 x 25GE SFP28, 2 x 10GE RJ45. Versions: FortiGate 3501G (storage).
- Firewall throughput
- 595 / 590 / 420 Gbps
- Threat protection
- 105 Gbps
- IPsec VPN
- 163 Gbps
- Form
- Rackmount
Who it suits
As a rackmount unit it suits a head office, campus or data centre with a server rack. With protection switched on, plan for an internet line of no more than about two-thirds of the threat protection throughput figure. For the FortiGate 3500G that means a line of up to about 70 Gbps.
Fortinet FortiGate 3500G specifications
| Performance | |
|---|---|
| Firewall throughput | 595 / 590 / 420 Gbps |
| IPS throughput | 125 Gbps |
| NGFW throughput | 115 Gbps |
| Threat protection throughput | 105 Gbps |
| IPsec VPN throughput | 163 Gbps |
| TLS inspection throughput | 112 Gbps |
| Maximum concurrent sessions | 179 million |
| New sessions per second | 1.1 million |
| Hardware | |
| Form factor | 2 RU |
| Ports | 2 x 400GE QSFP-DD, 4 x 100GE QSFP28, 30 x 25GE SFP28, 2 x 10GE RJ45 |
| Storage | 2 x 1.92 TB on the 3501G |
| Power supply | Dual power supplies |
| Versions sold | FortiGate 3501G (storage) |
Specifications from Fortinet's published data, checked October 2026. See Fortinet's firewall pages. Throughput figures are each manufacturer's own published numbers. Manufacturers test in different ways, so compare across brands with care. Confirm details before ordering.
What we do with it
- Supply
Firewall supply and installation
The right-sized firewall from any of the five brands, with its licence, installed and configured at your site.
- Audit
Firewall configuration and audit
A review of your rules, firmware, admin access and VPNs, with the weak points fixed and written down.
- Renewal
Firewall licence renewal
Renewals for FortiGuard, Sophos, Palo Alto Networks, SonicWall and Juniper subscriptions, quoted from your serial number.
- Migrate
Firewall migration
Move from an old firewall to a new one, same brand or another, with the rules and VPNs carried over.
Questions about the FortiGate 3500G
What internet speed can the FortiGate 3500G handle?
Fortinet publishes a threat protection throughput of 105 Gbps for the FortiGate 3500G. Leaving headroom for busy hours, that suits an internet line of up to about 70 Gbps with protection switched on. With inspection off, its firewall throughput is 595 / 590 / 420 Gbps.
What ports does the FortiGate 3500G have?
2 x 400GE QSFP-DD, 4 x 100GE QSFP28, 30 x 25GE SFP28, 2 x 10GE RJ45.
How many connections can the FortiGate 3500G handle?
Fortinet lists a maximum of 179 million concurrent sessions and 1.1 million new sessions per second.
Does the FortiGate 3500G need a licence?
The hardware works as a basic firewall on its own. Protection features such as intrusion prevention, web filtering and anti-malware need an active Fortinet subscription, and so do firmware updates and support. We quote the firewall with the licence term you choose.
Do you supply the FortiGate 3500G with installation?
Yes. We supply it with its licence registered, install and configure it at your site, and hand over the logins and documentation. Ask for a quote on this page.
Similar Fortinet models
- Rackmount
Fortinet FortiGate 3000G
Firewall 397 / 394 / 234 Gbps, threat protection 80 Gbps
- Rackmount
Fortinet FortiGate 3700F
Firewall 589 / 589 / 420 Gbps, threat protection 75 Gbps
- Rackmount
Fortinet FortiGate 4400F
Firewall 1.15 / 1.14 / 0.50 Tbps, threat protection 75 Gbps
- Rackmount
Fortinet FortiGate 4800F
Firewall 3.1 / 3.1 / 0.93 Tbps, threat protection 75 Gbps
Closest models from other brands
Throughput figures are each manufacturer's own published numbers. Manufacturers test in different ways, so compare across brands with care.
- Rackmount
Sophos XGS 8500
Firewall 190 Gbps, threat protection 92.5 Gbps
- Rackmount
Palo Alto Networks PA-5550
Firewall 175 Gbps, threat protection 120 Gbps
- Rackmount
SonicWall NSsp 15700
Firewall 105 Gbps, threat protection 82 Gbps
- Rackmount
Juniper SRX4700
Firewall 1.4 Tbps, threat protection 100 Gbps (NGFW)