Can not Access by SSL

‘’’
Hi,
i have a problem trying to configure access via SSL.

I have installed duck dns add on
i have configured duck dns addon also using let’s encrypt configuratio (Setting true the acceptance of the terms. i see certificates under /ssl/ path)
i have inserted this two line in configurations.yaml trough home assistant studio code server.
http:
ssl_certificate: /ssl/fullchain.pem
ssl_key: /ssl/privkey.pem

I saved, Checked configuration and reloaded “position and customization”.
I have a Fastweb modem that give me some proble to portforwarding 443.
So i have decided to forward port 1000 (external) to port 8123 (internal).

Now the situation from the external of my network is this one:
if i go to http://myaddress.duckdns.org:1000 everythings works fine in protocol HTTP
If i go to httpS://myaddress.duckdns.org:1000 i receive ERR_SSL_PROTOCOL_ERROR.

Could you help my to do some troubleshooting?
Thanks a lot
‘’’