Billion BIGUARD 2. Supported network protocols: PPPoE, PPTP, DHCP, NTP, SMTP, SNMP, IGMP, NAT, DMZ. Security algorithms supported: Web. Data transfer rate: 0.01 Gbit/s. Dimensions (WxDxH): 265 x 176 x 44 mm. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 70 °C