4
6.3.2 How NAT Works ................................................................................. 43
6.3.3 NAT Application ................................................................................. 44
6.3.4 NAT Mapping Types ........................................................................... 45
6.3.5 DMZ ..................................................................................................... 45
6.3.6 Virtual Server...................................................................................... 46
6.3.7 IP Address Mapping........................................................................... 47
6.4 QoS ................................................................................................................ 48
6.5 VLAN .............................................................................................................. 49
6.6 ADSL .............................................................................................................. 51
7. Access Management .................................................................................. 52
7.1 ACL................................................................................................................. 52
7.2 Filter ............................................................................................................... 53
7.3 SNMP ............................................................................................................. 56
7.4 UPnP .............................................................................................................. 57
7.5 DDNS.............................................................................................................. 58
7.6 CWMP ............................................................................................................ 59
8. Maintenance................................................................................................ 61
8.1 Administration............................................................................................... 61
8.2 Time Zone ...................................................................................................... 61
8.3 Firmware ........................................................................................................ 63
8.4 System Restart.............................................................................................. 64
8.5 Diagnostic ..................................................................................................... 64
9. Status .......................................................................................................... 66
9.1 Device Info..................................................................................................... 66
9.2 System Log ................................................................................................... 68
9.3 Statistics ........................................................................................................ 69
10. Troubleshooting ....................................................................................... 71
10.1 Using LEDs to Diagnose Problems........................................................... 71
10.1.1 Power LED ........................................................................................ 71
10.1.2 LAN LED ........................................................................................... 71
10.1.3 ADSL LED ......................................................................................... 71
10.2 Problems with the Web Interface .............................................................. 72
10.3 Problems with the Login Username and Password ................................ 72
10.4 Problems with LAN Interface ..................................................................... 73
10.5 Problems with WAN Interface .................................................................... 73
10.6 Problems with the Internet Access ........................................................... 74
