US Robotics Firewall/VPN. Ethernet LAN data transfer rates: 10/100 Mbit/s. Number of users: 253 user(s). VPN support: - VPN Server – PPTP and IPSec - VPN Client – PPTP and IPSec - Supports 253 IPSec VPN Tunnels. Flash memory: 16 MB, Internal memory: 64 MB. Certification: FCC, IC, CE, UL/CUL