... PPP Client and PPP server,VPN client(PPTP,L2TP,IPSEC and GRE)(only for VPN version),DHCP server and client,DDNS ... SystemIndustrial ARM9 CPU,200MFLASH4MB (Extendable to 16MB)SDRAM16MB (Extendable to 64MB)E2PROM64KB Interface10/100M Ethernet PortRS232 ... VPN client(PPTP,L2TP,IPSEC and GRE)(only for VPN version)Support auto recovery mechanism, including online detect ,auto redial when offline to ...