> 3. Traditionally the dot is the zero-level or extra-top level domain, a bit like / for root in the Unix file system. Indeed if you use dig you may be familiar that it writes domains like “www.google.com.” My web browser only partly seems to accept this format.
The browser actually handles it just fine, but some webservers refuse to handle it, despite it being a spec. Most famously Traefik and Caddy as webservers refuse to support these, just because their devs don’t understand the spec and think they know better (what a surprise, both are written in go after all)
This actually causes quite a bit of trouble when you have internal systems resolving pretty much everything as local domain first, and some external webservers don’t support the spec. Most famously, caddyserver.com. itself is broken
The browser actually handles it just fine, but some webservers refuse to handle it, despite it being a spec. Most famously Traefik and Caddy as webservers refuse to support these, just because their devs don’t understand the spec and think they know better (what a surprise, both are written in go after all)
This actually causes quite a bit of trouble when you have internal systems resolving pretty much everything as local domain first, and some external webservers don’t support the spec. Most famously, caddyserver.com. itself is broken