Nginx doesn't seem to route traffic to turn

Hi All,

first of all thanks for the great work of running a project like this.

I currently try to set up a jitsi-meet instance and I realized, that Nginx should route SSL traffic which is not websites to coturn on port 4445 in the default setup.

From /etc/nginx/modules-enabled/60-jitsi-meet.conf:

map $ssl_preread_alpn_protocols $upstream {
        "h2"            web;
        "http/1.1"      web;
        "h2,http/1.1"   web;
        default         turn;
    }

Unfortunately, that part doesn’t seem to work as intended.
The coturn server is running and occupies port 4445 for SSL. I tested with nmap and curl.

Yet if a third party connects to the conference, I get " Bridge Channel send: no opened channel." in the Browser. There are no error messages in the nginx logs. I also don’t see any traffic going to port 4445 either using tcpdump.

Do you have any idea what’s going on?

Many thanks,
Mat