The SonicWall NSa 5700 – Appliance Only 02-SSC-4330 firewall is one of the best enterprise firewalls that offers superior performance with a simple management interface. The SonicWall NSa 5700 – Appliance Only is rated for 2500+ users, 28 Gbps firewall throughput, and 15 Gbps 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.