Juniper · Data-centre SRX
Juniper SRX4100
The Juniper SRX4100 is a rackmount firewall that runs Junos OS. Juniper publishes a firewall throughput of 40 Gbps and an IPS throughput of 13.9 Gbps for it. It has 8 x 1GbE/10GbE SFP+.
- Firewall throughput
- 40 Gbps
- Threat protection
- 13.9 Gbps (IPS)
- IPsec VPN
- 10.5 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 IPS throughput figure. For the SRX4100 that means a line of up to about 9.2 Gbps.
Juniper SRX4100 specifications
| Performance | |
|---|---|
| Firewall throughput | 40 Gbps |
| Firewall throughput (IMIX) | 20 Gbps |
| IPS throughput | 13.9 Gbps |
| IPsec VPN throughput | 10.5 Gbps |
| Maximum concurrent sessions | 5 million |
| New sessions per second | 250,000 |
| Hardware | |
| Form factor | Rackmount |
| Ports | 8 x 1GbE/10GbE SFP+ |
Session, port, IMIX and VPN figures are from Juniper's SRX performance matrix.
Specifications from Juniper's published data, checked October 2026. See Juniper'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 SRX4100
What internet speed can the SRX4100 handle?
Juniper publishes an IPS throughput of 13.9 Gbps for the SRX4100. Leaving headroom for busy hours, that suits an internet line of up to about 9.2 Gbps with protection switched on. With inspection off, its firewall throughput is 40 Gbps.
What ports does the SRX4100 have?
8 x 1GbE/10GbE SFP+.
How many connections can the SRX4100 handle?
Juniper lists a maximum of 5 million concurrent sessions and 250,000 new sessions per second.
Does the SRX4100 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 Juniper subscription, and so do firmware updates and support. We quote the firewall with the licence term you choose.
Do you supply the SRX4100 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 Juniper models
- Rackmount
Juniper SRX2300
Firewall 39 Gbps, threat protection 12 Gbps (NGFW)
- Rackmount
Juniper SRX4120
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- Rackmount
Juniper SRX4600
Firewall 400 Gbps, threat protection 21 Gbps (NGFW)
- Rackmount
Juniper SRX4300
Firewall 98 Gbps, threat protection 24 Gbps (NGFW)
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
Fortinet FortiGate 1000F
threat protection 13 Gbps
- Rackmount
Sophos XGS 3300
Firewall 58 Gbps, threat protection 10 Gbps
- Rackmount
Palo Alto Networks PA-3430
Firewall 29 Gbps, threat protection 15 Gbps
- Rackmount
SonicWall NSa 4800
Firewall 20 Gbps, threat protection 13 Gbps