I’ve been trying for yonks (>two full days, plus crashing HA along the way) to get duckdns to work on my home assistant, so that I can remote access it from my telephone. Without success. There are pages and pages of people trying to get it to work, with multiple suggestions, mostly without success. I then came across Tailscale, it took me all of ten minutes to set it up, and WORKING. Whow, so hope this helps anybody trying to get remote access to their home assistant. This is not a publicity for Tailscale or Duckdns, just I’m so pleased to get it finally working.
Nice, that guide is quite detailed. Btw, duckdns cant provide remote connection on its own. Wireguard can if you know your home IP. Since most users dont have static IP, they can use dynamic dns service like duckdns that tracks your home IP and nothing else. Many home routers also support dynamic dns and/or VPN server.