... used protocols from logical link layer to upper application layer,such as TCP/IP/UDP and so ... 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 ... specifying local and remote IPCan be used as PPP server. Support multi authentication method, such as PAP,CHAP, ...