This is bad, bad, bad advice. You don't set the DNS on your local machine. That breaks things. The DNS needs to be set at the gateway. If you change your PC/mac's DNS to an external service, you won't be able to resolve any addresses on the local network.
Come on, CloudFlare. You guys know better than that. Please stop breaking the (local) internet.
Come on, CloudFlare. You guys know better than that. Please stop breaking the (local) internet.