Juniper SRX300-SYS-JB is the exact ordering identifier covered here, in the SRX300 range. The reviewed specification records firewall throughput: 1.9 Gbps (1518-byte); 600 Mbps (IMIX); ipsec vpn throughput: 336 Mbps (1400-byte); 116 Mbps (IMIX); concurrent sessions: 64,000. Use this guide to decide what to include in a configuration request, rather than treating similar model numbers as interchangeable.
Specifications that define this model
The values below retain the source qualifiers. A missing field is not evidence that a capability is included or absent.
| Specification | Recorded value |
|---|---|
| Firewall throughput | 1.9 Gbps (1518-byte); 600 Mbps (IMIX) |
| IPsec VPN throughput | 336 Mbps (1400-byte); 116 Mbps (IMIX) |
| Concurrent sessions | 64,000 |
| Interfaces | 6 x 1GbE RJ-45; 2 x 1GbE SFP |
| Form factor | Desktop |
| Segment | Branch / SMB |
| Power supplies | External AC-to-DC adapter included |
How to evaluate this exact configuration
Network interfaces
Network interfaces for SRX300-SYS-JB: 6 x 1GbE RJ-45; 2 x 1GbE SFP. Draw the WAN, LAN, management and resilience connections before ordering optics or cables. Check the hardware reference for any shared-port arrangements.
Published inspection rating
Published inspection rating for SRX300-SYS-JB: 1.9 Gbps (1518-byte); 600 Mbps (IMIX). Keep the traffic mix, packet size, enabled services and software-version qualifiers with the rating. This is a manufacturer figure, not a benchmark performed by technix.guru or a promise for a particular workload.
VPN sizing
VPN sizing for SRX300-SYS-JB: 336 Mbps (1400-byte); 116 Mbps (IMIX). Size encrypted traffic separately from inspected internet traffic. Tunnel count, users and inspection policy need their own design checks; a throughput number does not establish them.
Installation format
Installation format for SRX300-SYS-JB: Desktop. Check rack or desk space, power feeds, airflow and the accessories actually supplied. A family photograph does not establish the contents of the exact ordering code.
Questions before you request a quote
Which product does SRX300-SYS-JB identify?
It identifies Juniper SRX300 desktop branch firewall, Junos Base. Keep SRX300-SYS-JB on the requirement and quote; a family name alone does not fix the ordering configuration.
What should I check before ordering SRX300-SYS-JB?
Start with the specification and configuration checks above, then state the quantity, destination and intended connections or platform. Ask for the exact contents of the offered configuration and identify every proposed substitution separately.
Build a clear requirement
Specify SRX300-SYS-JB, quantity and delivery country, then add the configuration information discussed above. Keep accessories and any accepted alternative as separate lines. Request current pricing and availability rather than relying on an article for live commercial information.
View the SRX300-SYS-JB product listing · Browse Juniper firewalls · Request a quote
For the wider selection process, read the related buying guide.
Sources and scope
Document and identifier checks: 2026-10-17. Prepared from manufacturer documentation and the catalogue's recorded specifications; no hands-on benchmark is claimed. Confirm destination-specific options and configuration eligibility against the source documents. Prices, stock, delivery dates and coverage terms are not established by this guide.