nginx-tunnel.conf

# copy to /etc/nginx/sites-available/tunnel.conf

proxy_http_version 1.1;

# http://nginx.org/en/docs/http/websocket.html
map $http_upgrade $connection_upgrade {
    default upgrade;
    ''      close;
}

server {

        server_name tunnel.intesso.io *.tunnel.intesso.io;

        location / {
                proxy_pass http://localhost:9876;
                proxy_http_version 1.1;
                # proxy_set_header Upgrade $http_upgrade;
                # proxy_set_header Connection 'upgrade';
                # proxy_set_header Host $host;
                # proxy_cache_bypass $http_upgrade;

                proxy_set_header X-Real-IP $remote_addr;
                proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
                proxy_set_header Host $http_host;
                proxy_set_header X-Forwarded-Proto http;
                proxy_set_header Upgrade $http_upgrade;
                proxy_set_header X-NginX-Proxy true;
                proxy_set_header Connection $connection_upgrade;
        }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/tunnel.intesso.io/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/tunnel.intesso.io/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot

}

# sudo ln -s /etc/nginx/sites-available/tunnel.conf /etc/nginx/sites-enabled/
# systemctl reload nginx

server {
    if ($host = *.tunnel.intesso.io) {
        return 301 https://$host$request_uri;
    } 
    # managed by Certbot


    if ($host = tunnel.intesso.io) {
        return 301 https://$host$request_uri;
    } # managed by Certbot



        listen 80;

        server_name tunnel.intesso.io *.tunnel.intesso.io;
    return 404; # managed by Certbot




}