SRX4300 Firewall Datasheet

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Product Overview

As data centers evolve from traditional architecture to distributed, the firewall’s role needs to expand. Rather than being a perimeter technology, firewalls need to be part of a security fabric woven throughout the network. A security fabric ensures that security is maintained at every point of connection.

Juniper Networks SRX4300 next-generation firewall is integral to this new architecture, and it empowers organizations to operationalize security across their networks. This 1 U, power- efficient firewall features built-in zero-trust, Ethernet VPN-Virtual Extensible LAN (EVPN-VXLAN) fabric integration and AI- Predictive Threat Prevention to secure your network. The SRX4300 delivers next- generation firewall throughput of 45 Gbps per rack unit and supports multiple 100 Gbps interfaces with wire speed MACsec.


Product Description

Juniper Networks® SRX4300 Firewall is a high-performance, next-generation firewall (NGFW) designed to safeguard your enterprise campus, data center edge, and core. It also supports roaming and SD-WAN secure hub firewall use cases. Combining carrier-grade routing with state-of-the-art switching, this platform delivers robust security, effective threat detection, and comprehensive automation and mitigation capabilities.

Figure 1: Juniper SRX Series Firewalls have achieved the highest scores in security effectiveness by CyberRatings and NetSecOpen

Figure 1: Juniper SRX Firewalls have achieved the highest scores in security effectiveness by CyberRatings and NetSecOpen

SRX4300 delivers NGFW features that support the changing needs of cloud-enabled enterprise networks and data centers. Whether rolling out new services within an enterprise campus, connecting to the cloud seamlessly, complying with industry standards, or achieving operational efficiency, the SRX4300 empowers organizations to operationalize zero-trust principles at scale while realizing their business objectives. The SRX4300 protects critical corporate assets with features such as intrusion prevention system (IPS), follow-the-user and follow-the-application access policies, and Juniper’s AI-Predictive Threat Prevention. Furthermore, SRX4300 works with Juniper’s cloud security solutions to secure hybrid-cloud environments with networkwide visibility and control, providing consistently secure on-premises and cloud environments.

As network architectures become more distributed and decentralized, Juniper Networks SRX Series Firewalls ensure seamless integration with other Juniper and third-party networking platforms, and facilitate architectural transformation. At the same time, the NGFWs facilitate architectural transformation, taking organizations from on-premises to hybrid cloud environments seamlessly and cost effectively. SRX Series Firewalls are the first to implement industry-standard Ethernet VPN (EVPN)  type 5 and Virtual Extensible LAN (VXLAN)  protocols within data center environments, enabling the SRX4300 to act as a secure, fabric aware leaf in the data center spine-leaf architecture.

The SRX4300 participates in the industry-first Connected Security Distributed Services Architecture, enabling organizations to scale both horizontally and elastically, and it simplifies operational management of large-scale firewall networks. With this architecture, several SRX4300 platforms can work together as a single large logical firewall to provide security at higher performance and scale.

The SRX4300 is powered by Junos® operating system, the OS that underpins and helps secure the world’s largest mission-critical enterprise and service provider networks. It is managed by Juniper Security Director Cloud, Juniper’s unified management experience that connects the organization’s current deployments with future architectural rollouts. Security Director Cloud uses a single policy framework enabling consistent security policies across any environment and expanding zero trust to all parts of the network from the edge into the data center. This provides unbroken visibility, policy configuration, administration, and collective threat intelligence all in one place.


Architecture and Key Components

The SRX4300 hardware and software architecture provides cost- effective security in a compact, scalable 1U form factor. Purpose- built to protect network environments and provide Internet Mix (IMIX) firewall throughput of up to 50 Gbps, the SRX4300 incorporates multiple security services and networking functions on top of Junos OS, providing highly customizable threat protection, automation, and integration capabilities. Best-in-class advanced security capabilities on the SRX4300 are offered as 45 Gbps of NGFW, 45 Gbps of IPS, and up to 30 Gbps of IPsec VPN in the data center, enterprise campus, and regional headquarters deployments with IMIX traffic patterns.

Built-in Zero Trust

To increase trust and streamline operations, the SRX4300 features several built-in zero trust device capabilities, including an embedded Trusted Platform Module (TMP) 2.0 and cryptographically signed device ID. The SRX4300 supports RFC compliant Secure Zero Touch Provisioning (sZTP) to deploy products in your network efficiently, expediently, and remotely. Additionally, the SRX4300 supports MACsec at wire speed, ensuring data integrity, and confidentiality.


Connected Security Distributed Services Architecture

The SRX4300 is part of Juniper’s Connected Security Distributed Services Architecture which revolutionizes data center security. With Juniper’s Connected Security Distributed Services Architecture, firewall performance can scale horizontally by interconnecting traffic forwarding and security services across multiple geographic locations. Juniper’s solution also provides automated failover and backup nodes for both forwarding and inspection components. In addition to redundancy and load balancing, Juniper’s Connected Security Distributed Services Architecture simplifies how large-scale data center firewall networks are managed and operated. Regardless of how many firewall engines across the various form factors (physical, virtual, containerized) are added, they can all be managed as one logical unit. This centralized management eliminates the complexity that has been an unintended consequence of a traditional scale-out approach.


Features and Benefits

Business Requirement Feature/Solution SRX4300 Advantages
High performance Hardware accelerated encryption/decryption
  • Offloads CPU intensive encryption/decryption tasks
  • Improves performance for SSL and IPsec
High-quality, end-user experience Application visibility and control
  • Updates application continuously and decodes custom applications
  • Controls and prioritizes traffic based on application and user role
  • Inspects and detects applications inside SSL-encrypted traffic, including Web and SaaS
Advanced threat protection NGFW Services: IPS, antivirus, antispam, Web filtering
Juniper Advanced Threat Prevention Cloud: sandboxing, Encrypted Traffic Insights, SecIntel threat intelligence feeds
  • Prevents exploits with 99.9% effectiveness2; signatures update in real time
  • Protects against known malware and malicious Web and DNS traffic
  • Sandboxing for unknown malware across multiple OS types, including iOS, Windows, Android, and CentOS
  • Delivers threat intelligence in an open platform to accommodate for third-party and custom threat feeds
  • Detects threats hidden inside encrypted traffic without decrypting
Zero-day protection Juniper’s AI-Predictive Threat Prevention
  • Predicts and prevents malware at line rate by using AI to effectively identify threats from packet snippets
  • Eliminates patient-zero infections
  • Auto-generates protective signatures that remain active for the full attack lifecycle, keeping the network safe from subsequent attacks
Secure data transactions Juniper Secure Connect: IPsec VPN, remote access/SSL VPN
  • Provides high-performance IPsec VPN with dedicated crypto engine
  • Offers diverse VPN options for various network designs, including remote access and dynamic site-to-site communications
  • Simplifies large VPN deployments with auto-VPN
  • Includes hardware-based crypto acceleration
  • Secure and flexible remote access SSL VPN
Advanced networking services Routing, secure wire
  • Supports carrier-class advanced routing and quality of service (QoS)
Security embedded into the data center fabric EVPN-VXLAN (EVPN Type 5 route)
  • Enhances tunnel inspection for VXLAN encapsulated traffic with Layer 4-7 security services
  • Eases operations with Type 5 support through BGP
  • Does not require decapsulation for EVPN-VXLAN traffic
Reliability Chassis cluster, redundant power supplies
  • Provides stateful configuration and session state synchronization
  • Supports active/active and active/backup deployment scenarios
  • Offers highly available hardware with redundant power supply unit (PSU) and fans
Easy to manage and scale Juniper Security Director Cloud, on-box GUI
  • Provides centralized management via Juniper’s unified management experience, including zero-touch provisioning (ZTP), unbroken visibility, intelligent rule placement, and simplified policy configuration and automation
  • Supports Network Address Translation (NAT), and automated IPsec VPN deployments via wizards
  • Supports on-box GUI
Built-in zero trust capabilities DevID with TPM 2.0 Module
  • Verifies the device’s trust posture easily
  • Provides cryptographically signed device ID that supports RFC-compliant sZTP for hardware and software attestation
  • Mitigates the risks of supply chain attacks
Low TCO Junos OS
  • Integrates routing and security capabilities into a single device
  • Reduces OpEx with Junos OS automation capabilities
  • Automated integration with other devices running Junos OS, such as Juniper MX, PTX, and ACX routers, EX and QFX switches, and Cloud-Native Contrail Networking (CN2)

2Exploit block rate results tested by CyberRatings’ 2023 Enterprise Firewall test report

Figure 2: Juniper Networks SRX4300 firewall

Figure 2: SRX4300 firewall

Software Specifications

Firewall Services

  • Stateful firewall services
  • Zone-based firewall
  • Screens and distributed denial of service (DDoS) protection
  • Protection from protocol and traffic anomalies
  • Unified Access Control (UAC)
  • Integration with Juniper Mist Access Assurance


Carrier-Grade Network Address Translation (CGNAT)

  • Carrier-grade Network Address Translation (Large-scale NAT)
  • IPv4 and IPv6 address translation NAT44, NAPT44, NAT66, NAPT66, NAT64, NAT46
  • Static and dynamic 1-1 translation
  • Source NAT with Port Address Translation (PAT)
  • Destination NAT with Port Address Translation (PAT)
  • Persistent NAT (EIM/EIF)
  • Port Block Allocation (PBA)
  • Deterministic NAT (DetNAT)
  • Port overload
  • Twice-NAT44
  • DS-lite and Port Control Protocol (PCP)


VPN Features

  • Tunnels: Site-to-site, hub and spoke, dynamic endpoint, AutoVPN, ADVPN, Group VPN (IPv4/ IPv6/Dual Stack)
  • Juniper Secure Connect: Remote access/SSL VPN
  • Configuration payload: Yes
  • IKE encryption algorithms: Prime, 3DES-CBC, AEC-CBC, AES-GCM, Suite B
  • Authentication: Pre-shared key and public key infrastructure (PKI) (X.509)
  • IPsec: Authentication Header (AH) / Encapsulating Security Payload (ESP) protocol
  • IPsec authentication algorithms: hmac-md5, hmac-sha-196, hmac-sha-256
  • IPsec encryption algorithms: Prime, DES-CBC, 3DES-CBC, AEC-CBC, AES-GCM, Suite B
  • Perfect forward secrecy, anti-replay
  • Internet Key Exchange: IKEv1, IKEv2
  • Monitoring: Standard-based dead peer detection (DPD) support, VPN monitoring
  • VPNs GRE, IP-in-IP, and MPLS


High Availability Features

  • Virtual Router Redundancy Protocol (VRRP): IPv4 and IPv6
  • Stateful high availability: Dual box clustering
    • Active/passive
    • Active/active
    • Configuration synchronization
    • Firewall session synchronization
    • Device/link detection
    • In-Service Software Upgrade (ISSU)
    • IP monitoring with route and interface failover
    • BFD monitoring 
  • Chassis cluster HA and Multinode HA (MNHA)


Application Security Services (offered as advanced security subscription license)

  • Application visibility and control
  • Application QoS
  • Advanced/application policy-based routing (APBR)
  • Application Quality of Experience (AppQoE)
  • Application-based multipath routing
  • User-based firewall


Threat Defense and Intelligence Services (offered as advanced security subscription license)

  • Intrusion prevention system
  • AI-Predictive Threat Prevention
  • Antivirus
  • Antispam
  • Category/reputation-based URL filtering
  • SSL proxy/inspection
  • Protection from botnets (command and control)
  • Adaptive enforcement based on GeoIP
  • Juniper Advanced Threat Prevention, a cloud-based SaaS offering, to detect and block zero-day attacks
  • Adaptive Threat Profiling
  • Encrypted Traffic Insights
  • SecIntel threat intelligence
  • Juniper ATP virtual appliance, a distributed, on-premises advanced threat prevention solution to detect and block zero-day attacks


Routing Protocols

  • IPv4, IPv6, static routes, RIP v1/v2
  • OSPF/OSPF v3
  • BGP with route reflector
  • IS-IS
  • Multicast: Internet Group Management Protocol (IGMP) v1/v2; Protocol Independent Multicast (PIM) sparse mode (SM)/ source-specific multicast (SSM); Session Description Protocol (SDP); Distance Vector Multicast Routing Protocol (DVMRP); Multicast Source Discovery Protocol (MSDP); reverse path forwarding (RPF)
  • Encapsulation: VLAN, Point-to-Point Protocol over Ethernet (PPPoE)
  • Virtual routers
  • Policy-based routing, source-based routing
  • EVPN-VXLAN (EVPN Type 5 route)
  • Equal-cost multipath (ECMP)


QoS Features

  • Support for 802.1p, DiffServ code point (DSCP), EXP
  • Classification based on VLAN, data-link connection identifier (DLCI), interface, bundles, or multifield filters
  • Marking, policing, and shaping
  • Classification and scheduling
  • Weighted random early detection (WRED) Guaranteed and maximum bandwidth
  • Ingress traffic policing
  • Virtual channels


Network Services

  • Dynamic Host Configuration Protocol (DHCP) client/server/ relay
  • Domain Name System (DNS) proxy, dynamic DNS (DDNS)
  • Juniper real-time performance monitoring (RPM) and IP monitoring
  • Juniper flow monitoring (J-Flow)


Advanced Routing Services

  • Circuit cross-connect (CCC), translational cross-connect (TCC)
  • L2/L2 MPLS VPN, pseudo-wires
  • Virtual private LAN service (VPLS), next-generation multicast VPN (NG-MVPN))
  • MPLS traffic engineering and MPLS fast re-route


Management, Automation, Logging, and Reporting

  • SSH, Telnet, SNMP-MIBs, Traps
  • Smart image download
  • Juniper CLI and Web UI, NetCONF, XML APIs, RMON
  • Juniper Networks Security Director Cloud
  • Python
  • Junos events, commit and OP scripts
  • Application and bandwidth usage reporting
  • Debug and troubleshooting tools


Hardware Specifications

Table 3. SRX4300 Hardware Specifications
Specifications SRX4300
Onboard ports 8 x 1 GbE/2.5 GbE/5 GbE/10 GbE BASE-T
Onboard small form-factor pluggable plus (SFP+) transceiver ports 8 x 1 GbE/10 GbE SFP+
4 x 1 GbE/10 GbE/25 GbE SFP28
6 x 40 GbE/100 GbE QSFP28
Out-of-Band (OOB) management ports 1 x 1 GbE G (RJ-45)
Dedicated high availability (HA) ports 2 x 1 GbE SFP
Console 1 (RJ-45)
USB 3.0 ports (Type A) 1
Storage (SSD) 1 x 120 GB (primary), 1 x 960 GB (secondary + logging disk)
Dimensions and Power
Form factor 1U
Size (W x H x D) 17.28 x 1.74 x 18.20 in
(43.89 x 4.42 x 46.23 cm)
Weight (device and PSU) Chassis with two AC PSU: 20.2 lb (9.2 kg)
Chassis with two DC PSU: 20.5 lb (9.3 kg)
Chassis with package: 36.6 lb (16.6 kg)
Redundant PSU 1+1
Power supply 2 x 850W AC PSU redundant
2 x 850 W DC PSU redundant
Average heat dissipation 1 x DC PSU (40V):  1221.5 BTU/h
2 x DC PSU (40V):  1224.9 BTU/h
1 x AC PSU (110V):  1206.2 BTU/h
1 x AC PSU (230V):  1175.5 BTU/h
2 x AC PSU (110V):  1228.4 BTU/h
2 x AC PSU (230V):  1206.2 BTU/h
Maximum current consumption 4.67 A (for 110 V AC PSM)
2.188 A (for 230 V AC PSM)
11.53 A (for -40 V DC Power)
Maximum inrush current 40 A for 1 cycle of AC (AC PSM)
40 A-pk (DC PSM)
Environment and Regulatory Compliance
Airflow/cooling Front to back
Operating temperature 32° to 104° F (0° to 40° C at 6000 ft altitude)
Operating humidity 5% to 90% non-condensing
Meantime between failures (MTBF) Over 100,000 hours (12 years)
FCC classification Class A
RoHS compliance RoHS 6
Performance and Scale
Firewall throughput3 (IMIX) 50 Gbps
Firewall throughput3 (1518B) 90 Gbps
IPsec VPN throughput3 (IMIX) 30 Gbps
IPsec VPN throughput3 (1400B) 75 Gbps
Application security performance (TPS#) 60 Gbps
Next-generation firewall (TPS)4 45 Gbps
Secure Web Access Firewall (CPS**) 45 Gbps
Advanced Threat (CPS**)6 15 Gbps
Connections per second (64B) 550,000
Maximum concurrent sessions (IPv4 or IPv6) 10 Million
Route table size (RIB/FIB) (IPv4) 2 Million/1 Million
IPsec VPN tunnels 8,000

3Throughput numbers based on UDP packets and RFC2544 test methodology
4Next-generation firewall performance is measured with firewall, application security, and IPS enabled
5Secure Web Access firewall performance is measured with firewall, application security, IPS, SecIntel, and URL filtering enabled
6Advanced Threat performance is measured with Firewall, Application Security, IPS, SecIntel, URL Filtering and Malware Protection enabled
#TPS Method: Throughput performance of average HTTP sessions
**CPS Method: Short-lived sessions

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1000779 - 003 - EN DECEMBER 2023