The SonicWall NSA 3700 – Appliance Only 02-SSC-4326 firewall is one of the best mid-range firewalls that offers superior performance with a simple management interface. The SonicWall NSA 3700 – Appliance Only is rated for 100-200 users, 5.5Gbps firewall throughput, and 2.2Gbps VPN throughput. Trust that your network security environment is protected with any of the SonicWall licenses that include Total Secure Essentials, Total Secure Advanced Secure Upgrade Plus Essentials, or Secure Upgrade Plus Advanced enhanced security features.