TRENDnet 4-Port VPN Router,  TW100-BRV214 Compatible with most popular cable/DSL Internet service providers using Dynamic/Static IP, PPPoE, PPTP and L2TP protocols. Firewall protection with Network Address Translation (NAT), Stateful Packet Inspection (SPI), and Denial of Service (DoS) prevention Supports up to 8 Generic Routing Encapsulation (GRE) tunnels