WatchGuard Firebox X5w to Firebox X50w Model Upgrade. Data transfer rate (max): 100 Mbit/s, Firewall throughput: 110 Mbit/s, VPN throughput: 35 Mbit/s. Management protocols: DHCP, Supported network protocols: SMTP, FTP, NNTP, PPPoE. Security algorithms supported: DES, 3DES. Processor clock speed: 266 MHz. Internal memory: 64 MB