... supports static and dynamic route,PPP Client and PPP server,VPN client(PPTP,L2TP,IPSEC and GRE)(only for ... VPN version),DHCP server and client,DDNS (dynamic DNS),firewall,NAT and DMZ ... IP, specifying local and remote IPCan be used as PPP server. Support multi authentication method, such as PAP,CHAP,CHAP ... upgrade firmwareSupport multi OS, such as WINDOWS, LINUX, SCO UNIX etc