Draytek Vigor2860 User Manual page 188

Available settings are explained as follows:
Item
Private IP
Choose IP
DMZ Host for WAN2, WAN3, LTE or WAN4 is slightly different with WAN1. Active True IP
selection is available for WAN1 only.
See the following figure.
174
Description
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.
Vigor2860 Series User's Guide