Reverse proxy through Synology

I tryed do it but I have an error…

400: Bad Request

what’s mean…and how I can fix it?

thanks

an integration…the log message is

Logger: homeassistant.components.http.forwarded
Source: components/http/forwarded.py:114
Integration: HTTP (documentation, issues)
First occurred: 26 ottobre 2023 alle ore 18:13:08 (15 occurrences)
Last logged: 03:31:29

A request from a reverse proxy was received from xx.xx.xx.xx, but your HTTP integration is not set-up for reverse proxies

NET::ERR_CERT_COMMON_NAME_INVALID

now this is the problem… anybody can help me please?

hello

im very new to this stuff and what you have noted down here has helped me learn some new terms but i still cant figure it out, are you able to email me for some help if you dont mind?

The thing about custom header and websocket was the solution to my “unable to connect” headache. Thanks man! How did you find out that it’s needed? Any reference?

To be honest I do not recall… But I’m 99% sure that it comes from some other post on this Forum…