I am running HA on HAOS 15.2 with Core 2025.6.1 on a RaspPI with HA OS installation.
The setup works fine on a local IP with my mobile devices running the HA app and using the url homeassistant.local:8123.
But when I try to send a web browser on MacOS 15.5 to this url it says
This site can’t be reached
http://homeassistant.local:8123/ is unreachable.
The same happens if I substitute the ip address as http:10.0.0.22:8123.
On the command line I can ping that IP address with no trouble. The routing table says there is a valid route to the interface on the RaspPI.
If I try telnet 10.0.0.22 8123
I get
telnet: connect to address 10.0.0.44: No route to host
telnet: Unable to connect to remote host
So I assume this is something on the RaspPI.
When I look at Settings->System on the HA app on my iPad, it shows ‘Network External Access Disabled’. Clicking on that tab shows under Local network that Automatic is disabled and the link is http://10.0.0.22:8123 .
Any suggestions on how to enable the web frontend access from other browsers?