ZyXEL Communications CellPipe 7130 RG User Manual page 46

Chapter 2 Tutorials
Select the first option. Remove the existing interfaces in the Selected DNS
6
Server Interfaces list. Select and move a WAN interface (ppp0 in this example)
to the Selected DNS Server Interfaces list to use that interface as the system
DNS server. Click Next.
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CellPipe 7130 RG User's Guide