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2025-11-09 20:06:24 +01:00

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<h1>Quick fix</h1>
<h2>HomeAssistant not connecting over reverse proxy</h2>
<p>
Make sure you have enabled <em>Websockets Support</em> or similar
functionality in your reverse proxy client.
</p>
<p>
If you are getting a <code>400 Bad Request</code> error, find the
HomeAssistant log file and look for the following error message:
</p>
<p class="code">
A request from a reverse proxy was received from 12.34.56.78, but your
HTTP integration is not set-up for reverse proxies
</p>
<p>
In your <code>configuration.yaml</code> file, add the following lines:
</p>
<p class="code">
http:<br>
&emsp;use_x_forwarded_for: true<br>
&emsp;trusted_proxies:<br>
&emsp;&emsp;- 12.34.56.78 # The IP address from the error message
</p>
<h2>Explanation</h2>
<p>
HomeAssistant uses websockets to communicate with the browser.
</p>
<p>
If you are using a reverse proxy, the IP address of the incoming
connection is not trusted and gets rejected by HomeAssistant.
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