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Secondary DNS server
I have the sac2v25 router. I cannot type in the same IP address for the primary and secondary DNS server.
I run a pi-hole ad blocker on my network so I point the router to the pi-hole as the primary DNS server. When the pi-hole blocks ads, the router thinks something is wrong so it falls back to the secondary DNS server which I have to leave blank, since it will not accept the same IP address for the primary and secondary DNS server. With the blank secondary DNS field, the router uses Spectrums default DNS server which of course does not block ads.
All routers I have ever used do not default to an unspecified DNS server when the primary DNS server fails. If the secondary DNS server is not specified, the router should not pick one on its own.
Is there a way to get the sac2v25 router to accept the same IP address for the primary and secondary DNS server entry fields?