SonicWall TZ370 High Availability Firewall

The SonicWall TZ370 High Availability Firewall represents the latest evolution in desktop form factor security appliances for small to mid-sized organizations and distributed enterprises. Engineered as a next-generation firewall (NGFW), the TZ370 merges enterprise-grade threat protection with compact, easy-to-deploy hardware. It is built to defend aggregated networks, protect critical applications, and enable secure remote access while keeping management simple for IT teams. With support for 5 or 10 Gigabit Ethernet interfaces, smart routing, and robust security services, this device is designed to future-proof your network against evolving cyber threats, all within a scalable, cost-effective footprint. Whether you’re securing a single office, multiple branches, or a blended environment with remote workers, the TZ370 delivers a comprehensive security stack, streamlined administration, and reliable high-availability options that minimize downtime and maximize productivity.

• The TZ370 is a compact, desktop NGFW that delivers enterprise-grade security in a small footprint. It integrates advanced threat prevention, IPS, application control, and SSL/TLS inspection to stop known and evolving threats at the network edge. This means faster threat detection, safer web and application usage, and reduced risk to critical business processes. The device is engineered to handle mixed workloads—from everyday web traffic to bandwidth-intensive line-of-business applications—without sacrificing security or performance.
• High Availability built in. The TZ370 supports high-availability (HA) configurations to ensure business continuity. In an HA deployment, a second unit runs in lockstep as a standby, ready to take over in the event of a failure. This seamless failover preserves active sessions, maintains VPN connections, and keeps security policies consistent, minimizing downtime and preserving user experience across the organization. HA is a strategic choice for distributed offices, retail locations, and remote sites where uninterrupted network security matters most.
• Flexible connectivity and SD-WAN capabilities. With 5 or 10 Gigabit Ethernet interfaces available, the TZ370 provides multiple WAN/LAN paths and supports secure site-to-site VPNs and remote access VPNs for mobile workers. Its SD-WAN features enable intelligent path selection, automatic failover, and dynamic routing that optimize performance for cloud applications, SaaS services, and branch workloads. This makes it easier to consolidate WAN services while preserving application performance and reliability.
• Centralized management and cloud integration. The TZ370 is designed to slot into modern security operations with streamlined management through SonicWall’s management ecosystem. It integrates with Capture Security Center for centralized visibility, policy management, and analytics, enabling administrators to monitor threats, performance, and compliance from a single pane of glass. This reduces administrative overhead, accelerates incident response, and simplifies firmware updates and policy changes across multiple devices.
• Deployment versatility and comprehensive security toolkit. This firewall is purpose-built for small businesses that demand robust protection without complexity. It supports intrusion prevention, anti-malware capabilities, application-level controls, and SSL decryption where appropriate, delivering consistent security policies across users, devices, and locations. The TZ370’s compact design, quiet operation, and easy mounting options make it ideal for desks, cabinets, or dedicated network closets, while its scalability supports growth as the organization expands to new offices or increases remote connectivity.

Technical Details of SonicWall TZ370 High Availability Firewall

• Model: TZ370 High Availability Firewall
• Form factor: Desktop/NV compact appliance designed for office environments
• Interfaces: 5 or 10 Gigabit Ethernet ports to support multiple WAN, LAN, and DMZ connections
• High Availability: Stateful failover with synchronized policies and sessions between HA pair
• Security features: Next-generation firewall capabilities including intrusion prevention, application control, malware protection, and SSL/TLS inspection
• VPN capabilities: IPsec site-to-site and SSL VPN for secure remote access
• SD-WAN: Intelligent path selection, load balancing, and automatic failover for optimized cloud and SaaS access
• Cloud integration: Compatibility with Capture Security Center for centralized monitoring, reporting, and policy management
• Management: Intuitive web-based interface and centralized management options for scalable administration
• Performance emphasis: Designed to deliver strong security without compromising user experience in small and distributed deployments

how to install SonicWall TZ370 High Availability Firewall

Begin with a clear plan for your network topology. Position the TZ370 in a secure, well-ventilated area and connect power and cooling as recommended by your facility guidelines. Identify your trusted WAN connections, LAN segments, and any DMZ or cloud integration points so you can map ports and security zones accurately during setup.

1. Power on and connect the firewall to the network. Plug the first unit into your primary WAN, and attach the LAN/DMZ interfaces to the appropriate network segments. If you are configuring a high-availability pair, prepare the second TZ370 unit for pairing and place it in an identical physical environment to ensure consistent performance and health checks.

2. Access the management interface. Use a computer on the trusted LAN to reach the device’s management portal. Log in with the default administrator credentials provided in the user guide and begin the initial setup wizard. If you are deploying HA, configure the primary unit first and then join the standby unit to the HA group according to the on-screen instructions.

3. Define your security policies. Create firewall rules, intrusion prevention settings, and application controls tailored to your organization’s needs. Configure SSL inspection where appropriate to balance security with performance and user privacy. Set up VPNs for site-to-site connectivity and remote access for employees working from remote locations or home offices.

4. Configure SD-WAN and routing. If you are combining multiple Internet connections, specify path selection rules, fallback behavior, and route prioritization to ensure critical applications receive preferred bandwidth while non-essential traffic remains manageable.

5. Enable monitoring and alerts. Integrate with Capture Security Center if you use it, and verify logs, alerts, and dashboards to watch for threats, utilization, and policy violations. Schedule firmware updates and backups to maintain security posture and business continuity. Finally, test the failover in your HA configuration to confirm seamless operation in case of a device failure.

6. Validate performance and security. Run a quick performance assessment to ensure your chosen policies provide the expected throughput and latency. Confirm VPN connectivity and remote access reliability, and adjust rules or inspection settings as needed to optimize user experience while preserving robust protection.

Frequently asked questions

• What is the SonicWall TZ370 High Availability Firewall best suited for? It is designed for small to mid-sized organizations, distributed offices, and remote sites that require enterprise-grade security with a compact footprint and reliable high-availability options to minimize downtime.
• What security features does the TZ370 include? The TZ370 combines next-generation firewall protection with intrusion prevention, application control, malware protection, SSL/TLS inspection, and VPN capabilities to secure users, devices, and data across networks and cloud services.
• Can the TZ370 support multiple WAN connections? Yes. With 5 or 10 Gigabit Ethernet interfaces, it supports multiple WAN paths and SD-WAN features for efficient traffic routing and reliable connectivity to cloud applications and remote sites.
• How does high availability work on the TZ370? In an HA deployment, a standby TZ370 unit mirrors the primary unit’s configuration and state. If the primary fails, the standby takes over seamlessly, preserving active sessions and security policy enforcement to minimize downtime.
• Is integration with cloud management possible? Yes. The TZ370 works with SonicWall Capture Security Center to centralize monitoring, policy management, and analytics across devices, helping simplify administration and improve threat visibility.