Block Some Countries from visiting my website

Hi all, I used this method to block access to /wp-admin location from all countries except some preferred.

location /wp-admin {
    if ($allowed_country = no) {
        return 403;
    }
}

It works fine when trying to open this page in browser. But still I can see in access.log many POST requests and in worpdress logs failed login requests from rejected countries. Is possible to use geoip-database-contrib module also for POST requests?

I tried:

location /wp-admin {
    if ($allowed_country = no) {
        deny all;
    }
}

but after reload nginx doesnt start at all. Do you have any ideas?

Your site is exactly what I have looking for!! It certainly helps a frequent traveler like me to locate all the stamp shows when traveling. Keep up with the good work.