Linksys EtherFast Cable/DSL Firewall Router w/ 4-Port Switch/VPN endpoint. Networking standards: IEEE 802.3, IEEE 802.3u. Management protocols: SNMP, Web Browser. VPN support: IPSec VPN. Certification: FCC class B, CE mark. Operating temperature range (T-T): 0 - 40 °C, Operating relative humidity range: 10 - 85 %