8.4 NTP ........................................................................................................................................................... 82
8.5 VPN .......................................................................................................................................................... 83
8.5.1 OpenVPN .......................................................................................................................................... 83
8.5.2 IPSec ................................................................................................................................................. 86
8.5.3 GRE Tunnel ....................................................................................................................................... 89
8.5.4 PPTP ................................................................................................................................................. 91
8.5.5 L2TP .................................................................................................................................................. 92
8.6 Dynamic DNS............................................................................................................................................ 93
8.7 SNMP ....................................................................................................................................................... 94
8.7.1 SNMP Settings .................................................................................................................................. 94
8.7.2 TRAP Settings ................................................................................................................................... 95
8.8.1 SMS Utilities ..................................................................................................................................... 96
8.8.2 Call Utilities ...................................................................................................................................... 99
8.8.3 User Groups ..................................................................................................................................... 99
8.8.4 SMS Management .......................................................................................................................... 100
8.8.5 Remote Configuration.................................................................................................................... 101
8.8.6 Statistics ......................................................................................................................................... 105
8.9.1 Post/Get Configuration .................................................................................................................. 105
8.9.2 Email to SMS .................................................................................................................................. 107
8.9.3 Scheduled Messages ...................................................................................................................... 108
8.9.4 Auto Reply Configuration ............................................................................................................... 110
8.9.5 SMS Forwarding ............................................................................................................................. 111
8.9.6 SMPP .............................................................................................................................................. 114
5