The inherent 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:
If you previously have set up WAN Alias in Internet Access>>PPPoE/PPPoA or Internet
Access>>MPoA, you will find them in Aux. WAN IP list for your selection.
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Vigor2930 Series User's Guide