Problem getting Duckdns working with Asus router

I´m new to home assistant and want to get started with duckdns.
I have looked on a video how to configure it, and thought it should work, but still I get a error when I try to use my duckdns domain.

So I have set up DuckDNS addon with no errors:
“lets_encrypt”: {
“accept_terms”: true,
“certfile”: “fullchain.pem”,
“keyfile”: “privkey.pem”
“token”: “mytoken”,
“domains”: [
“seconds”: 300
The configuration.yaml file looks like:
api_password: myapi_password
ssl_certificate: /ssl/fullchain.pem
ssl_key: /ssl/privkey.pem

and restarts with no errors

On my Asus router I have added a port forwarding from 443 to 8123 for my internal IP for the home assistant:

Router is restarted!

When trying to enter the address in a webbrowser (also tried in Incgnito mode) I get the following error:
The webpage could not enable a safe connection:

What have I missed?

Can you translate the dialog box please?

When I run Edge (where I get English error messages) I get this error:

I.e. I assume there is a problem on the router or similar.
Are there any way to verify that the router settings is correct?

When I used telnet on my local machine, I got this error, might indicate that the router setup is not proper?

Connecting To not open connection to the host, on port [443]: Connect failed

Are you trying to connect from within your own lan?

I have tried both from within the network as well as from outside, but get the same error!

In your configuration.yaml under base url try taking off the “https://” so it matches what you have in the DuckDNS config.

Configure your TCP/IP Port number separately:

  server_port: 8123
  ssl_certificate: /ssl/certfile.pem
  ssl_key: /ssl/privkey.pem

Thanks both of you! I will try both tips when I get back home! Will inform if any of those tips solved my problem!

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Back home, and I have tried to get it up and running, but with no success! :frowning:

I suspect some settings on my router needs to be updated, but I have no clue what to change!
Any ideas what to do to make it work, or anything I can do to try to find the root cause?

You could try to forward port 8123 to port 8123.