Draytek Vigor2830 Series User Manual page 147

The security properties of NAT are somewhat bypassed if you set up DMZ host. We suggest
you to add additional filter rules or a secondary firewall.
Click DMZ Host to open the following page:
Available settings are explained as follows:
Item
Private IP
Choose PC
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
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Vigor2830 Series User's Guide