... it supports static and dynamic route,PPP Client and PPP server,VPN (including PPTP and L2TP+ IPSEC), DHCP server and client,DDNS (dynamic DNS ... IP, specifying local and remote IP16. Can be used as PPP server. Support multi authentication method, such as PAP,CHAP,CHAP-MS ... . Support TFTP upgrade firmware20. Support multi OS, such as WINDOWS, LINUX, SCO UNIX etc.