Billion BIGUARD S10. Supported network protocols: NAT, DDNS, DMZ, DHCP, SNTP, SNMP. Security algorithms supported: SNMP. Dimensions (WxDxH): 250 x 176 x 35 mm. Operating temperature range (T-T): 0 - 40 °C, Storage temperature range (T-T): -20 - 70 °C. Compatible operating systems: Microsoft Windows, Linux, Macintosh