The SonicWall TZ370 High Availability 02-SSC-6443 firewall is one of the best SMB firewalls that offers superior performance with a simple management interface. The SonicWall TZ370 High Availability is rated for 1-25 users, 3.0 Gbps firewall throughput, and 1.0 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.