How to Restrict Access to Directories by IP Address
To secure your admin area from hackers, you should only allow access to your admin directory from selected IP addresses. You can create a dot htaccess file in the directory where you want to restrict access to specific IP addresses.
For example, if you have a WordPress blog installed on your main directory and you log in via example.com/wp-admin, you should create an htaccess file in /wp-admin/.htaccess and put the following code into it. Please, don’t forget to replace the allowed IP address with your IP address.
order deny, allow deny from all allow from YOUR-IP-ADDRESS-HERE
Replace the Your-IP-Address-Here text with your IP address.
You can test this by accessing the wp-admin directory from another IP address, not mentioned in your htaccess file.