Hi!
I have Raspberry (OS: Raspbian - 4 GB RAM) with the last version of Home Assistant. No problems about installation of Home Assistant 
If I want to access to Home Assistan with IP LAN (es: 192.168.1.25), I haven’t errors: it is OK!
But I want to access to Home Assistan from Internet (es: with my smartphone with 3G/4G, without using my WiFi), I can’t access: I see an error, from Chrome I have ERR_CONNECTION_REFUSED (I know always my public IP)
Port-forwading is OK:
Internal Port: 8123; External Port: 8123; IP address: 192.168.1.25 (always, this IP doesn’t change).
I check my public IP + port 8123: it is ok (I check with this online tool: https://www.yougetsignal.com/tools/open-ports/). The port is opened!
From my Raspberry (Raspbian):
sudo netstat -pant | grep 8123
tcp 0 0 0.0.0.0:8123 0.0.0.0:* LISTEN 4510/python3
tcp 0 0 172.30.32.1:8123 172.30.32.2:54068 ESTABLISHED 4510/python3
So:
- IP of my Raspberry is always 192.168.1.25
- I know always my public IP
- no problem if I use my WiFi, ERR_CONNECTION_REFUSED if I want to access HA from outside
Where is my error(s)?