htaccess access to file by ip range

How to allow access to file only to users with ip which are in a range of ip addresses?

For example file admin.php. and range from 0.0.0.0 to 1.2.3.4.

I need configure access to only ONE file not to directory.

Answer

Just add a FilesMatch or Files directive to limit it to a specific script.

The following would block acces to all scripts ending in “admin.php” :

<FilesMatch "admin.php$">
    Order deny,allow
    Deny from all
    Allow from 10.0.0.0/24
</FilesMatch>

The following would ONLY block admin.php :

<Files "admin.php">
    Order deny,allow
    Deny from all
    Allow from 10.0.0.0/24
</Files>

For more information refer to the apache docs on Configuration Sections.