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Blocked that hard-coded google dns garbage.
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this post was submitted on 08 Nov 2023
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I have a firewall rule to dst-nat any outgoing DNS requests not coming from piHole back to the piHole server. That way all devices on the LAN are forced to use piHole for DNS and can't bypass it. I don't have an OPNSense firewall but I would think it should be able to do that as well.
I suspect DoT and DoH still go through, though? I mean you can always block the port 853 for DoT, but DoH is another story.
That's correct. I block DoT in my firewall and block known DoH domains in piHole. I'm sure stuff slips through occasionally but the vast majority of my DNS requests are handled by piHole.
Traditional DNS over UDP/53 is insecure but I'm using ProtonVPN's DNS server over VPN externally so I'm not worried about that.
I see. I may try to do something similar but towards Unbound on my OPNSense router, if that's possible.