DNS traffic is plaintext. MITM is all that's needed to be able to bypass custom DNS servers. An ISP, obviously, has to be in an MITM position to be able to prov

DNS traffic is plaintext. MITM is all that's needed to be able to bypass custom DNS servers. An ISP, obviously, has to be in an MITM position to be able to provide internet service. Here's an example: https://jeff.vtkellers.com/posts/technology/force-all-dns-queries-through-pihole-with-openwrt/ https://jeff.vtkellers.com/posts/technology/force-all-dns-qu...