Changing DNS on Airport Extreme to 1.1.1.1
I am trying to use Cloudflare's new DNS service with my Airport Extreme in order to gain the speed and privacy that Cloudflare claims to provide. However, whenever I go into Airport Utility to change the DNS settings to 1.1.1.1 and 1.0.0.1 and 2606:4700:4700::1111 and 2606:4700:4700::1001 for IPv6, then choose Update, the Airport Extreme loses its connexion, and the internet dies. I have to force quit Airport Utility, then restart my router, and when I go back to Airport Utility, the old settings are back. Anyone know what the problem is and how to fix it? Thanks.
MacBook Pro TouchBar and Touch ID, macOS High Sierra (10.13.1)