htaccess access to file by ip range

Question

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

Answer 1

You cannot match an IP range with allow, but you can emulate it with a CIDR notation:

Order allow,deny

# 0.0.0.0 - 0.255.255.255.255
Allow from 0.0.0.0/8

# 1.0.0.0 - 1.1.255.255
Allow from 1.0.0.0/15

# 1.2.0.0 - 1.2.1.255
Allow from 1.2.0.0/23

# 1.2.2.0 - 1.2.2.255
Allow from 1.2.2.0/24

# 1.2.3.0 - 1.2.3.3
Allow from 1.2.3.0/30

# 1.2.3.4
Allow from 1.2.3.4