I’m currently running pi-hole and unbound on my raspberry pi. Because this is the case, what should the DNS server IP address be for the physical raspberry pi? Right now, it’s the same IP address as pi-hole. Is this OK?
Most of the time it will work just fine pointing to itself, but if something goes wrong with the unbound or Pi-hole's DNS resolution then it could cause problems updating either your lists, or the unbound or Pi-hole software itself.
It's often best if you don't have the raspberry pi's DNS pointing to itself. A good option is to choose a DNS provider that you trust for this purpose from either your IP's DNS server, or any of the reliable public operators (google at 8.8.8.8, quad9 at 9.9.9.9 or cloudflare at 1.1.1.1).
It will only apply to the Raspberry Pi, everything else on the network will still be via your Pi-hole installation.
I personally use Cloudflare due to lowest latency from my location and unreliability of my ISP's DNS server. That's not an endorsement, just how I chose.
I appreciate the insight. I’ll set it to Cloudflare just to be safe.
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