In order to secure your admin area from abusers it is recommended to restrict access to your admin directory to all IP's except your own. To do this, you need to create a .htaccess file in the directory you want to restrict access to.
For example, if you have a WordPress blog installed and your admin directory is example.com/wp-admin, you should create a .htaccess file in the public_html/wp-admin/ folder and then add this code into the file.
order deny,allow
deny from all
allow from YOUR-IP-ADDRESS-HERE
(Replace "Your-IP-Address-Here" text with your own IP address, for example 192.168.0.1).
You can test this by accessing your /wp-admin from another IP address which is not allowed by your .htaccess file.
Please note, it is assumed that you know what IP address is and you know that it can be dynamic or static.
