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4.4.8 PORT MODE (R2X4ONLY) .......................................................................................................... 37
4.5 SERVICE ........................................................................................................................................ 38
4.5.1 SERVICES -> DHCP SERVICE ......................................................................................................38
4.5.2 SERVICES -> DNS RELAY ...........................................................................................................39
4.5.3 SERVICES -> VRRP .................................................................................................................... 40
4.5.4 SERVICES -> DEVICE MANAGER .................................................................................................40
4.5.5 SERVICES -> DTU ......................................................................................................................41
4.6 FIREWALL......................................................................................................................................42
4.6.1 FIREWALL -> BASIC ....................................................................................................................42
4.6.2 FIREWALL -> FILTERING .............................................................................................................43
4.6.3 FIREWALL -> PORT MAPPING...................................................................................................... 44
4.6.4 FIREWALL -> VIRTUAL IP MAPPING............................................................................................44
4.6.5 FIREWALL -> DMZ..................................................................................................................... 45
4.6.6 FIREWALL -> MAC-IP BUNDLING ..............................................................................................45
4.7 QOS.............................................................................................................................................. 46
4.8 VPN ..............................................................................................................................................46
4.8.1 VPN -> IPSEC BASIC SETTING .................................................................................................. 47
4.8.2 VPN -> IPSEC TUNNELS ...........................................................................................................48
4.8.3 VPN -> GRE TUNNELS ..............................................................................................................51
4.8.4 VPN -> L2TP CLIENTS...............................................................................................................51
4.8.6 VPN -> L2TP SERVER ................................................................................................................ 52
4.8.7 VPN -> PPTP CLIENTS...............................................................................................................52
4.8.8 VPN -> PPTP SERVER................................................................................................................53
4.8.9 VPN -> OPENVPN TUNNELS .....................................................................................................54
4.8.10 VPN -> OPENVPN ADVANCED................................................................................................. 55
4.8.10 VPN -> CERTIFICATE MANAGEMENT .......................................................................................55
4.9 TOOLS ...........................................................................................................................................56
4.9.1 TOOLS -> PING..........................................................................................................................56
4.9.2 TOOLS -> TRACEROUTE..............................................................................................................56
4.9.3 TOOLS -> LINK SPEED TEST ....................................................................................................... 57
4.10 STATUS ........................................................................................................................................57
4.10.1 STATUS -> SYSTEM ...................................................................................................................58
4.10.2 STATUS -> MODEM ...................................................................................................................58
4.10.3 STATUS -> NETWORK CONNECTIONS........................................................................................59
4.10.4 STATUS -> ROUTE TABLE..........................................................................................................59
4.10.5 STATUS -> DEVICE LIST............................................................................................................59
4.10.6 STATUS -> LOG .........................................................................................................................60
5. HOW TO UPGRADE NEW FIRMWARE ..................................................................................... 61
6. HOW TO DIAGNOSE..................................................................................................................... 62
7. CONFIGURE VIA TELNET ........................................................................................................... 63
