WordPress single IP allow wp-admin access

Solution:

If you want to allow access folder by ip, then please add the below code in .htaccess file.

<Directory /path/to/the/folder>
            Options +Indexes
            IndexOptions +FancyIndexing
            Order deny,allow
            Deny from all
            Allow from X.X.X.X
</Directory>

For specific File then add the below code

<Files file-name.php>
        Order deny,allow
        Deny from all
        Allow from X.X.X.X
 </Files>