SonicWall Firewalls

RTDMI Threat Protection from Small Office to Enterprise

Island Electrical Supply stocks SonicWall firewalls across the TZ, NSa, and NSsp series. SonicWall's patented Real-Time Deep Memory Inspection (RTDMI) technology detects zero-day threats, ransomware, and encrypted attacks in real time.

SonicWall Firewall Applications

• Small office perimeter security — TZ series firewalls with full DPI protecting networks of 5-50 users at the internet edge
• Branch office VPN — Site-to-site IPSec tunnels connecting remote offices to headquarters with centralized management through NSM
• K-12 and higher education — Content filtering policies meeting CIPA compliance requirements across student and staff networks
• Retail PCI compliance — Network segmentation and deep packet inspection for businesses processing credit card transactions
• Remote workforce — SSL VPN and always-on VPN providing secure access for employees working from home or in the field

What Makes SonicWall Firewalls Different

SonicWall firewalls use RTDMI and Reassembly-Free Deep Packet Inspection (RFDPI) to scan every byte of every packet in real time without buffering. This means the firewall inspects encrypted TLS/SSL traffic, identifies zero-day malware, and blocks ransomware without the performance penalties that plague other DPI implementations.

The TZ series targets small offices and branch locations with throughput from 1 Gbps to 5 Gbps (firewall throughput with DPI enabled). The NSa series covers mid-size organizations with throughput from 3.5 Gbps to 15 Gbps. The NSsp series handles enterprise and data center environments where 40+ Gbps of inspected throughput is required.

SonicWall security services run on subscription bundles. The Total Security Suite includes gateway antimalware, intrusion prevention, content filtering, application control, cloud-based sandboxing (Capture ATP), and 24/7 support. Without an active subscription, the hardware still functions as a basic stateful firewall and router, but you lose the real-time threat intelligence feeds. Compare with firewall options from Ubiquiti and ZyXEL in our full network firewalls collection.

Key Specifications

• Series: TZ (small office/branch), NSa (mid-size), NSsp (enterprise/data center)
• Threat detection: RTDMI, RFDPI, Capture ATP cloud sandboxing
• VPN: Site-to-site IPSec, SSL VPN, and always-on VPN for remote workers
• Security services: Gateway antimalware, IPS, content filtering, application control (subscription)
• Management: SonicOS web interface, Network Security Manager (NSM) for multi-firewall management

In-stock SonicWall firewalls ship same day, and qualifying orders ship free. We offer installer discounts, wholesale pricing, and net terms for qualified B2B accounts. Browse all network firewalls or see our full SonicWall lineup. Need help sizing a firewall for your throughput? Reach us directly any time.