5
7.6.7 Port Scan Prevention ....................................................................................................................... 77
7.7 Routing ..................................................................................................................................................... 78
7.7.1 Static Routes .................................................................................................................................... 78
7.7.2 Dynamic Routes ............................................................................................................................... 79
7.8 Load Balancing ......................................................................................................................................... 82
8 Services ........................................................................................................................................................ 83
8.1 VRRP ......................................................................................................................................................... 83
8.1.1 VRRP LAN Configuration Settings .................................................................................................... 83
8.1.2 Check Internet connection ............................................................................................................... 83
8.2 TR-069 ...................................................................................................................................................... 84
8.2.1 TR-069 Parameters Configuration ................................................................................................... 84
8.3 Web filter ................................................................................................................................................. 84
8.3.1 Site blocking ..................................................................................................................................... 84
8.3.2 Proxy Based Content Blocker ........................................................................................................... 85
8.4 NTP ........................................................................................................................................................... 86
8.5 RS232/RS485 ............................................................................................................................................ 87
8.5.1 RS232 ............................................................................................................................................... 87
8.5.2 RS485 ............................................................................................................................................... 89
8.5.3 Modes of different serial types in RS232 and RS485 ....................................................................... 92
8.6 VPN .......................................................................................................................................................... 96
8.6.1 OpenVPN .......................................................................................................................................... 96
8.6.2 IPSec ................................................................................................................................................. 98
8.6.3 GRE Tunnel ..................................................................................................................................... 101
8.6.4 PPTP ............................................................................................................................................... 103
8.6.5 L2TP ................................................................................................................................................ 104
8.7 Dynamic DNS .......................................................................................................................................... 105
8.8 SMS Utilities ........................................................................................................................................... 106
8.8.1 SMS Utilities ................................................................................................................................... 106
8.8.2 Call Utilities .................................................................................................................................... 113
8.8.3 User Groups ................................................................................................................................... 114
8.8.4 SMS Management .......................................................................................................................... 114
8.8.5 Remote Configuration .................................................................................................................... 116
8.8.6 Statistics ......................................................................................................................................... 119
8.9 SNMP ..................................................................................................................................................... 119
8.9.1 SNMP Settings ................................................................................................................................ 120