Thank you Florian.
I’m trying to access from the same network of the fritzbox… from a windows 10 laptop.
I have installed a fresh hassio now to make sure it was nothing else I had configured previously. In the configuration.yaml I have:
http:
server_host: ::0
and I have also reset my complete router to factory settings. Then in the fritz “DNS Rebind Protection” I have added my duckdns page (xxxxxx.duckdns.org), as well as added the Permit Access to hassio on port 8123 ipv6.
I have removed the IPV4 IP address in the duckdns page. Only the IPV6 address is there now (2a02:xxxx…) pointing to the home assistant IPV6 address.
Unfortunatelly I’m only able to access the home assistant using the local ipv6 address fe80::4706:xxx…
Sometimes I can see two 2a02:xxx addresses in the Network in fritz box, but none of them works by accessing directly with the browser http://[]:8123 or by adding them on duckdns.
I will try the cloudflare then…