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.
Lol no, Tailscale is incredibly simple, even if you don’t have any idea how any of this works. Just install a client on your device, sign in, and you’re on the same network as your other devices. The fact that you have an opnsense router means that you’re comfortable with a level of networking complexity that most people simply cannot handle.