preventing requests with unknown host names

[Igal @ Lucee.org]

I want to disable processing of all requests that do not have a valid
hostname

I'm tried to follow the advice on:
http://nginx.org/en/docs/http/request_processing.html#how_to_prevent_undefined_server_names

so I have (inside http directive):

    server {

        listen      80;
        server_name "";
        return      444;
    }

I also tried

    server {

        listen      80;
        server_name _;
        return      444;
    }

but I am still able to access the website by its IP address?

what am I doing wrong?

-- 

Igal Sapir
Lucee Core Developer
Lucee.org <http://lucee.org/>

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