A simple solution using nginx to heal from attacks with rudy

This is a simple solution to help your website, lets say its being flooded, well a good way to heal this is first if its a rudy/any attack using fake refers, lets limit the refers.

So, here is example code:
server {
server_name website.tld www.website.tld;
root /var/www/website.tld/public_html;
include php;
access_log /var/www/website.tld-access.log;
error_log /var/www/website.tld-error.log;

    valid_referers none server_names ~(gmail.|google.|bing.|yahoo.);

    if ($invalid_referer) {
        return 403;
    }

}

So this code just denies anyone who does not have a valid referral.