Protect wp-login from Brute Force attacks that lack referrer

By North Street, A Creative Studio

This simple bit of code should be in every htaccess file. Basically it makes sure that the wp-login referrer matches the site it lives on, to protect against brute force attacks.

Make sure you update the “example.com” portion, or this won’t work!

<IfModule mod_rewrite.c>
RewriteEngine on
RewriteCond %{REQUEST_METHOD} =POST
RewriteCond %{HTTP_REFERER} !^http://(.*)?.example.com [NC]
RewriteCond %{REQUEST_URI} ^/wp-login\.php(.*)$ [OR]
RewriteCond %{REQUEST_URI} ^/wp-admin$
RewriteRule ^(.*)$ - [R=403,L]
</IfModule>

Further reading:

http://codex.wordpress.org/Brute_Force_Attacks#Deny_Access_to_No_Referrer_Requests

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