5.2.6 Link Backup ...........................................................................................................................................19
5.2.7 DHCP Service.........................................................................................................................................21
5.3 Application program configuration ................................................................................................................24
5.3.1 ICMP check...........................................................................................................................................24
5.3.2 DDNS configuration .............................................................................................................................27
5.3.3 SNMP configuration .............................................................................................................................28
5.3.4 M2M configuration...............................................................................................................................30
5.3.5 Timing configuration.............................................................................................................................32
5.3.6 Wake up configuration..........................................................................................................................34
5.3.7 DTU configuration (Optional) ..............................................................................................................37
5.3.8 GPS configuration (Optional) ...............................................................................................................40
5.4 Security ..........................................................................................................................................................42
5.4.1 Overview...............................................................................................................................................42
5.4.2 Configuration........................................................................................................................................42
5.5 Forward configuration....................................................................................................................................48
5.5.1 Overview...............................................................................................................................................48
5.5.2 NAT.......................................................................................................................................................48
5.5.3 Static Routing........................................................................................................................................52
5.5.4 QoS (Optional)......................................................................................................................................55
5.5.5 Dynamic Routing (Optional) ................................................................................................................57
5.6 VPN configuration .........................................................................................................................................62
5.6.1 Overview...............................................................................................................................................62
5.6.2 VPDN configuration .............................................................................................................................63
5.6.3 Tunnel configuration.............................................................................................................................65
5.6.4 IPSec configuration...............................................................................................................................66
5.7 System configuration......................................................................................................................................72
5.7.1 Overview...............................................................................................................................................72
5.7.2 Local Log..............................................................................................................................................72
5.7.3 Remote Log...........................................................................................................................................73
5.7.4 Clock.....................................................................................................................................................74
5.7.5 Account.................................................................................................................................................76
5.7.6 Network Test.........................................................................................................................................78
5.7.7 Files.......................................................................................................................................................79
5.8 Status..............................................................................................................................................................85
5.8.1 Overview...............................................................................................................................................85
5.8.2 Base Information...................................................................................................................................85
5.8.3 LAN......................................................................................................................................................86
5.8.4 WAN .....................................................................................................................................................87
5.8.5 Modem..................................................................................................................................................89
5.8.6 Routing Table........................................................................................................................................90
5.9 RESET button function..................................................................................................................................91
6Typical application..........................................................................................................................92
6.1 Overview ........................................................................................................................................................92