Draytek VIGOR2925 SERIES User Manual page 277

Private IP
Choose PC
DMZ Host for WAN2~ WAN4 is slightly different with WAN1. Active True IP selection is
available for WAN1 only.
See the following figure.
If you previously have set up WAN Alias for PPPoE or Static or Dynamic IP mode in
WAN2 interface, you will find them in Aux. WAN IP for your selection.
Choose Private IP or Active True IP first.
Active True IP selection is available for WAN1 only.
Enter the private IP address of the DMZ host, or click Choose
PC to select one.
Click this button and then a window will automatically pop
up, as depicted below. The window consists of a list of private
IP addresses of all hosts in your LAN network. Select one
private IP address in the list to be the DMZ host.
When you have selected one private IP from the above dialog,
the IP address will be shown on the following screen. Click
OK to save the setting.
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Vigor2925 Series User's Guide