location /dns-query {
        if ( $request_method !~ ^(GET|POST|HEAD)$ ) {
                return 501;
        }
        proxy_set_header Host $http_host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_redirect off;
        proxy_buffering off;
        grpc_pass grpc://127.0.0.1:4443;
}