Solving weird DNS resolv.conf issues on Ubuntu using the resolvconf service
Background Ubuntu has this fancy system where by /etc/resolv.conf isn’t actually a proper resolver but refers to a local server called 127.0.0.53. In some circumstances
8.8.4.4
How to purge Google and Cloudflare’s DNS Caches
With the best of luck your client might be using Google or Cloudflare’s DNS servers, and after a recent (a few hours or minutes) DNS