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.
Forwarding ports can be a pain, I admit, here in France you get a routeur supplied when you sign up for fiber, and of course they are all different. I got WireGuard with Duckdns working, though impossible to get just duckdns to work on it’s own. And it was was far more difficult than just tailscale.