How exactly is your Matrix server running? Behind an nginx reverse proxy or are you using the cloudflare tunnel directly to it? Personally, I have mine behind a reverse proxy and just point the tunnel at my proxy.

Do it in stages. First get it running without any reverse proxies, just connecting directly to the exposed ports. Once that’s working, add in your proxy. Then finally add cloudflare tunnels.

Hey, I recently accomplished this.

You have to host the .well-known via a reverse proxy and then point CT to the reverse proxy, like @[email protected] said. Personally, followed this guide and here they talk about how to serve the .well-known. You don’t have to follow it exactly, if you already have a working Synapse server.

I hope I could help you and if you have any more questions feel free to ask.

Edit: formatting

I’ve recently done the same thing. I setup both dendrite and synapse.

For both I tried the srv record and could not get it to pass the federation testers. In the end as mines behind a nginx proxy I served the wellknows frommnginx rather than letting synapse/dendrite serve it. Federated correctly afterwards.

As such I would suggest serving the json well know using whatever reverse proxy you are using.