ZyXEL VMG4381 User Guide - Page 18

Chapter 1 Introducing the Device • Back up the configuration (and make sure you know how to restore it). Restoring an earlier working configuration may be useful if the device becomes unstable or even crashes. If you forget your password, you will have to reset the Device to its factory default settings. If you backed up an earlier configuration file, you would not have to totally re-configure the Device. You could simply restore your last configuration. 1.4 Applications for the Device Here are some example uses for which the Device is well suited. 1.4.1 Internet Access Your Device provides shared Internet access by connecting the DSL port to the DSL or MODEM jack on a splitter or your telephone jack. You can have multiple WAN services over one ADSL or VDSL. The Device cannot work in ADSL and VDSL mode at the same time. Note: The ADSL and VDSL lines share the same WAN (layer-2) interfaces that you configure in the Device. Refer to Section 6.2 on page 79 for the Network Setting > Broadband screen. Computers can connect to the Device's LAN ports (or wirelessly). Figure 1 Device's Internet Access Application WLAN WAN LAN Bridging IPoE PPPoE ADSL / VDSL A WLAN LAN Bridging PPPoE IPoE PPPoA IPoA WAN ADSL A You can also configure IP filtering on the Device for secure Internet access. When the IP filter is on, all incoming traffic from the Internet to your network is blocked by default unless it is initiated from VMG4381-B10A User's Guide 18