Fortinet · Mid-range FortiGate
Fortinet FortiGate 120G
The Fortinet FortiGate 120G is a rackmount firewall that runs FortiOS. Fortinet publishes a firewall throughput of 39 / 39 / 28 Gbps and a threat protection throughput of 2.8 Gbps for it. It has 4 x 10GE SFP+, 18 x GE RJ45, 8 x GE SFP. Versions: FortiGate 121G (storage).
- Firewall throughput
- 39 / 39 / 28 Gbps
- Threat protection
- 2.8 Gbps
- IPsec VPN
- 35 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 120G that means a line of up to about 1.8 Gbps.
Fortinet FortiGate 120G specifications
| Performance | |
|---|---|
| Firewall throughput | 39 / 39 / 28 Gbps |
| IPS throughput | 5.3 Gbps |
| NGFW throughput | 3.1 Gbps |
| Threat protection throughput | 2.8 Gbps |
| IPsec VPN throughput | 35 Gbps |
| TLS inspection throughput | 3 Gbps |
| Maximum concurrent sessions | 3 million |
| New sessions per second | 140,000 |
| Hardware | |
| Form factor | 1 RU |
| Ports | 4 x 10GE SFP+, 18 x GE RJ45, 8 x GE SFP |
| Storage | 480 GB on the 121G |
| Power supply | Dual AC power supplies |
| Versions sold | FortiGate 121G (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 120G
What internet speed can the FortiGate 120G handle?
Fortinet publishes a threat protection throughput of 2.8 Gbps for the FortiGate 120G. Leaving headroom for busy hours, that suits an internet line of up to about 1.8 Gbps with protection switched on. With inspection off, its firewall throughput is 39 / 39 / 28 Gbps.
What ports does the FortiGate 120G have?
4 x 10GE SFP+, 18 x GE RJ45, 8 x GE SFP.
How many connections can the FortiGate 120G handle?
Fortinet lists a maximum of 3 million concurrent sessions and 140,000 new sessions per second.
Does the FortiGate 120G 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 120G 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 200G
Firewall 39 / 39 / 26.5 Gbps, threat protection 6 Gbps
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Fortinet FortiGate 400F
threat protection 9 Gbps
- Rackmount
Fortinet FortiGate 1000F
threat protection 13 Gbps
- Rackmount
Fortinet FortiGate 400G
Firewall 164 / 163 / 145 Gbps, threat protection 13 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 2100
Firewall 30 Gbps, threat protection 5 Gbps
- Rackmount
Palo Alto Networks PA-545-POE
Firewall 5.0 Gbps, threat protection 3.0 Gbps
- Rackmount
SonicWall NSa 2700
Firewall 5.2 Gbps, threat protection 3 Gbps
- Rackmount
Juniper SRX1500
Firewall 9 Gbps, threat protection 3 Gbps (IPS)