... , ADSL) (optional) Support VPN client(PPTP, L2TP, OPENVPN, IPSEC and GRE)(only for VPN version) Support VPN server(PPTP, L2TP, OPENVPN, IPSEC ... and GRE)(only for VPN version) Support local and ... . Support link disconnection when timeout Support APN/VPDN Support DHCP server and client, firewall, NAT, DMZ host, URL block, ...