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4.4.8 PORT MODE (R2X4 ONLY) .......................................................................................................... 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 IPMAPPING ............................................................................................ 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 STAT US ........................................................................................................................................ 57
4.10.1 STAT US -> SYSTEM ................................................................................................................... 58
4.10.2 STAT US -> MODEM ................................................................................................................... 58
4.10.3 STAT US -> NETWORK CONNECTIONS ........................................................................................ 59
4.10.4 STAT US -> ROUTE TABLE .......................................................................................................... 59
4.10.5 STAT US -> DEVICE LIST ............................................................................................................ 59
4.10.6 STAT US -> LOG ......................................................................................................................... 60
5. HOW TO UPGRADE NEW FIRMWARE ..................................................................................... 61
6. HOW TO DIAGNOSE ..................................................................................................................... 62
7. CONFIGURE VIA TELNET ........................................................................................................... 63