400: Bad Request when trying to access HA from remote server (solved)

[filipiff]

I put this info just for reference because I already solved the problem.

On my setup I use on remote server a docker container with the "linuxserver/openssh-server:latest" image and Traefik as a reverse proxy server to serve the internal http service to a public URL like https://homeassistant.mydomain.com.

My local HA instance is on a Raspberry Pi 3 with hass. The IP was set by dynamic IP from the internal router DHCP.

After the first installation & configuration everything was working perfectly, but some days later I began to get those "400: Bad Request" errors when trying to access my public HA address.

I discovered then that my local HA has changed his IP address and that this change wasn't reflected in the configuration.yaml on the [http] section, variable "trusted_proxies".

Replacing the IP with the new one, did solved the problem.

Maybe on the documentation should be mentioned that there is also this "trusted proxy" configuration setting in configuration.yaml

[iosoft]

I am facing the same issue.
https://e3606f60fce574.lhrtunnel.link/

What should be the "trusted proxy" value?

[ThomDietrich]

Hey!
This trusted proxy thing was introduced a few months ago and I just couldn't find the 10min to document this... 😅 Any volunteers to propose a few words for README or DOCS?