Please rename wp-login.php

or use next code in .htaccess to allow wp-login.php access from your IP address(es)
<Files "wp-login.php">
RewriteEngine Off
Require ip <YOU IP THERE LIKE X.X.X.X or NETWORK LIKE X.X.X.>
</Files>
If you have any future questions, please contact support: www at knu.ua