Juniper · Data-centre SRX
Juniper SRX4300
The Juniper SRX4300 is a rackmount firewall that runs Junos OS. Juniper publishes a firewall throughput of 98 Gbps and an NGFW throughput of 24 Gbps for it. It has 8 x 1/2.5/5/10GbE copper, 8 x 1GbE/10GbE SFP+, 4 x 1/10/25GbE SFP28, 6 x 40GbE/100GbE QSFP28.
- Firewall throughput
- 98 Gbps
- Threat protection
- 24 Gbps (NGFW)
- IPsec VPN
- 94 Gbps (1400-byte)
- 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 NGFW throughput figure. For the SRX4300 that means a line of up to about 16 Gbps.
Juniper SRX4300 specifications
| Performance | |
|---|---|
| Firewall throughput | 98 Gbps |
| Firewall throughput (IMIX) | 70 Gbps |
| NGFW throughput | 83 Gbps / 24 Gbps (two test profiles) |
| IPsec VPN throughput | 94 Gbps (1400-byte) / 40 Gbps (IMIX) |
| Maximum concurrent sessions | 10 million |
| New sessions per second | 800,000 |
| Hardware | |
| Form factor | 1U |
| Ports | 8 x 1/2.5/5/10GbE copper, 8 x 1GbE/10GbE SFP+, 4 x 1/10/25GbE SFP28, 6 x 40GbE/100GbE QSFP28 |
| Storage | 1 x 120 GB and 1 x 960 GB SSD |
| Power supply | 2 x 850 W AC or DC, redundant (1+1) |
| Dimensions | 43.89 x 4.42 x 46.23 cm (W x H x D) |
| Weight | 9.2 kg with two AC power supplies |
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 SRX4300
What internet speed can the SRX4300 handle?
Juniper publishes an NGFW throughput of 24 Gbps for the SRX4300. Leaving headroom for busy hours, that suits an internet line of up to about 16 Gbps with protection switched on. With inspection off, its firewall throughput is 98 Gbps.
What ports does the SRX4300 have?
8 x 1/2.5/5/10GbE copper, 8 x 1GbE/10GbE SFP+, 4 x 1/10/25GbE SFP28, 6 x 40GbE/100GbE QSFP28.
How many connections can the SRX4300 handle?
Juniper lists a maximum of 10 million concurrent sessions and 800,000 new sessions per second.
Does the SRX4300 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 SRX4300 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
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Juniper SRX4600
Firewall 400 Gbps, threat protection 21 Gbps (NGFW)
- Rackmount
Juniper SRX4200
Firewall 80 Gbps, threat protection 30 Gbps (IPS)
- Rackmount
Juniper SRX4100
Firewall 40 Gbps, threat protection 13.9 Gbps (IPS)
- Rackmount
Juniper SRX2300
Firewall 39 Gbps, threat protection 12 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 2600F
Firewall 198 / 196 / 140 Gbps, threat protection 25 Gbps
- Rackmount
Sophos XGS 4300
Firewall 75 Gbps, threat protection 25.2 Gbps
- Rackmount
Palo Alto Networks PA-3530
Firewall 45 Gbps, threat protection 25 Gbps
- Rackmount
SonicWall NSa 5800
Firewall 30 Gbps, threat protection 24 Gbps