nginx reverse proxy for unifi controller, so you can put a real cert in front of it.

nginx include unifi.conf

# listen on port 80, and redirect to port 443

server {
  listen 10.0.0.131:80;

  server_name   unifi01.int.unixathome.org;

  error_log  /var/log/nginx-unifi01.int.unixathome.org.error.log  info;
  access_log /var/log/nginx-unifi01.int.unixathome.org.access.log combined;

  return 301 https://$server_name$request_uri;
}



server {
  listen 10.55.0.131:443 ssl http2;

  server_name unifi01.int.unixathome.org;

  client_max_body_size 50m;

  root /usr/local/www/unifi01.int.unixathome.org;

  error_log  /var/log/nginx-unifi01.int.unixathome.org.error.log  info;
  access_log /var/log/nginx-unifi01.int.unixathome.org.access.log combined;

  ssl_certificate     /usr/local/etc/ssl/unifi01.int.unixathome.org.fullchain.cer;
  ssl_certificate_key /usr/local/etc/ssl/unifi01.int.unixathome.org.key;

  location  /  {
    proxy_pass      https://unifi01.int.unixathome.org:8443/;
    proxy_redirect  https://unifi01.int.unixathome.org:8443/ /;
    proxy_buffering off;

    proxy_read_timeout 60s;

    # May not need or want to set Host. Should default to the above hostname.
    proxy_set_header          Host            $host;
    proxy_set_header          X-Real-IP       $remote_addr;
    proxy_set_header          X-Forwarded-For $proxy_add_x_forwarded_for;

    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "Upgrade";
  }
}

Lines 43-45 avoid the 'Websocket connection error' messages. Those message coincide with Javascript console messages such as:

components.manage.js?v=5.6.24.0:215 WebSocket connection to 'wss://example.org/wss/s/super/events' failed: Error during WebSocket handshake: Unexpected response code: 400
n.open @ components.manage.js?v=5.6.24.0:215

The original revision of this file separately proxied /wss ; I found that to be unnecessary.

@dlangille any ideas how to use subfolder location for this?

location  /unifi {
    ....
}

returns 404 for me.

Thank you for this! All the other advice out there seemed to not fix the websocket error you mentioned.

@dlangille any ideas how to use subfolder location for this?

location  /unifi {
    ....
}

returns 404 for me.

Sorry, I only just saw this. Is it working yet for you?

Thank you for this! All the other advice out there seemed to not fix the websocket error you mentioned.

I'm happy it helps you. This solution is still in use at my place.