HomeAssitant OS Not Listening on 8123? (Can't reach externally)

Installation
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1

Hi there,

I’m not great at things like this - but I’ve read every thread identifying similar issues and can’t find a solution that works for me!
Running HA-OS on a Raspberry Pi 5.
I’m able to access my home network remotely and port forwarding is set up correctly for several other services on other pis (eg. jellyfin) - so I’m confident that’s not the issue.
Assuming the request it making it to this machine, I checked which ports HA was listening on:

Screenshot 2025-06-23 223402
Screenshot 2025-06-23 223402690×211 5.85 KB

Based on another thread, I also grabbed all the netinfo (which I will post in a reply perhaps because I’ve just been alerted new users only get one media upload per post and the terminal add-on for HA:OS won’t let me copy from it…)

Other threads sometimes suggest simply reinstalling HomeAssistant OS solves it - but if there’s a config I can just edit I’d prefer that option!

Any help is appreciated. :slight_smile:

2

Can you reach your Pi internally ?

3

Yes, no problem reaching it internally.
Just in case it’s helpful, here’s the netinfo:

Screenshot 2025-06-23 223416
Screenshot 2025-06-23 223416253×902 8.89 KB

4

HA OS itself does not have a firewall, and if you can reach it internally on port 8123, it should do so externally too. Something in your network must be blocking it.

5

From the command prompt “core-ssh”, you’re inside an add-on which is running under Docker on the HA-OS machine. For your netstat to produce the results you want, you’d need to be on the actual machine, either directly or via SSH using port 22222 once configured. This addon can help with the configuration.