Local HTTP does not work, HTTPS and DuckDNS works fine

Hello,

(running the latest hass.io on SSD via USB on RasPi 3b+)

I am confused. What could prevent the local http://homeassistant:8123 from functioning? (tried the ip address as well)

Getting

# This page isn’t working

**192.168.1.2**  didn’t send any data.

ERR_EMPTY_RESPONSE

Inside the HTTPS works.
From outside all works well https://home.duckdns.org

Nothing in the error logs (unless I am not looking at the right place for them)

I have the following add ons running:
DuckDns
AdGuard Home
Nginx Proxy Manager
Samba Share
and a few other unrelated add-ons (like GoogleBackup, FileEditor etc)

Any ideas would be much appreciated.

Are you running a reverse proxy with https configure there or do you have ssl enabled in HA and are port forwarding 8123 at your firewall? Post the http: section in your configuration.yaml file.

http:
  ssl_certificate: /ssl/fullchain.pem
  ssl_key: /ssl/privkey.pem

disabled AdGuard and Nginx Proxy Manager so that they are not in the picture at all…

So just standard HA and redirecting 443 to 8123 from the router

having this same issue when trying to configure duck dns according to the instructions, i suspect they updated home assistant in favor of the cloud platform so remote access only works if you have subscribed to ha cloud as they’ve removed the option to add a add an external url in advanced settings under general configuration.

HA can use https:// or http://, but it can’t do both. As soon as you configure certificates (https://), you can’t use http:// anymore.
Unless you use a reverse proxy for https:// (but then the last leg to HA is still http://, so the above is still true)