SonicWall Firewall, VPN & Network Security Solutions

The firewall is one of the most important control points in a business network. It connects the organization to the internet, protects inbound and outbound traffic, provides remote-access and site-to-site VPN, enforces security policies, and often manages multiple internet circuits. As bandwidth and encrypted traffic grow, the firewall also has to provide enough performance to inspect traffic without becoming the bottleneck.

Sarsfield Technology helps businesses design, install, configure, and support SonicWall firewalls. We size hardware, configure security services, build VPNs, manage rules and NAT, support NetExtender remote access, integrate failover internet, update firmware, troubleshoot connectivity, and plan replacements as models approach end-of-life.

Why SonicWall with Sarsfield Technology

A firewall should be sized for security-enabled throughput, not only the raw internet circuit. We consider users, applications, VPN, TLS inspection, security subscriptions, public services, segmentation, failover, and expected growth. That reduces the chance a firewall replacement becomes undersized as soon as advanced protection is enabled.

SonicWall Solutions We Implement & Support

SonicWall Gen 8 TZ Firewalls

SonicWall’s current Gen 8 TZ family includes models such as TZ280, TZ380, TZ480, TZ580, and TZ680 for small and midsize environments. Current Gen 8 capabilities include higher-speed interfaces, modern SonicOS 8 features, SD-WAN, VPN, threat prevention, application/web controls, and updated security subscriptions. Wireless variants are available on selected models.

Lifecycle Upgrades from Gen 7

SonicWall announced Last Time Buy for TZ270 and TZ470 hardware in June 2026, identifying TZ280 and TZ480 as the respective Gen 8 replacement models. We can review existing TZ deployments, support active devices, and plan upgrades before retirement milestones, support limits, or performance requirements force an emergency replacement.

Threat Prevention & Security Services

Depending on licensing, SonicWall can provide intrusion prevention, anti-malware, application control, content filtering, Geo-IP/botnet controls, threat intelligence, and other security services. We configure the firewall around the client’s requirements and avoid enabling features blindly without considering operational impact.

VPN & Remote Access

SonicWall supports site-to-site IPsec VPN and client remote access including NetExtender SSL VPN. We configure user access, routes, authentication, MFA-related integrations where supported, and troubleshooting for remote connectivity. For organizations with heavy remote-file or application use, we also evaluate the internet upload capacity that often limits VPN performance.

Multi-WAN, Failover & SD-WAN

Businesses with two internet connections can use SonicWall for failover and, depending on design, SD-WAN policies. We can integrate fiber, coax, fixed wireless, or 5G backup circuits, configure health checks and failover behavior, and test how critical services respond when the primary circuit is unavailable.

Network Security Manager

SonicWall Network Security Manager provides centralized cloud-based firewall visibility, deployment, policy management, analytics, and troubleshooting. Current NSM materials also highlight zero-touch deployment and AI-driven assistance. We can use centralized management to support multi-site and managed firewall environments more efficiently.

Current Capabilities & 2026 Product Direction

• SonicWall Gen 8 TZ firewalls are the current SMB/branch direction, including TZ280, TZ380, TZ480, TZ580, and TZ680 families.

• TZ270 and TZ470 entered Last Time Buy in June 2026; SonicWall recommends TZ280 and TZ480 as the corresponding Gen 8 replacements.

• Gen 8 supports updated SonicOS 8 security, VPN/SD-WAN, multi-gig interfaces on higher models, and modern deployment/management capabilities.

• Network Security Manager provides centralized cloud firewall management, policy orchestration, visibility, and zero-touch deployment.

• NetExtender remains an important SonicWall remote-access option for supported firewall environments.

How Sarsfield Technology Supports the Solution

• Firewall assessment and sizing

• SonicWall licensing and subscriptions

• New firewall installation

• Rules, NAT, and security-policy configuration

• Site-to-site VPN

• NetExtender/SSL VPN support

• Multi-WAN and ISP failover

• SD-WAN configuration where appropriate

• VLAN and segmentation support

• Network Security Manager administration

• Firmware updates and troubleshooting

• Gen 6/Gen 7 lifecycle and Gen 8 upgrade planning

A Better Fit for the Whole Technology Environment

Because a firewall touches every internet-based service, firewall support works best when the same team can troubleshoot the LAN, ISP, Wi-Fi, VPN, cloud services, and endpoints. Sarsfield Technology provides that broader context and can coordinate directly with internet providers and other vendors when the root cause is outside the firewall itself.

Serving Troy & Southeast Michigan Businesses

Sarsfield Technology is based in Troy, Michigan and supports small and midsize businesses throughout Southeast Michigan. We combine SonicWall expertise with managed IT services, cybersecurity, cloud, networking, backup, communications, field installation, and user support. That gives clients one local technology partner that can evaluate the entire environment and coordinate the vendors behind it.