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

check the man page of the Allow Directive

Order Deny,Allow
Deny from all
Allow from 10.1.0.0/255.255.0.0

A partial IP address

Example:

Allow from 10.1
Allow from 10 172.20 192.168.2

The first 1 to 3 bytes of an IP address, for subnet restriction.

A network/netmask pair

Example:

Allow from 10.1.0.0/255.255.0.0

A network a.b.c.d, and a netmask w.x.y.z. For more fine-grained subnet restriction.

A network/nnn CIDR specification

Example:

Allow from 10.1.0.0/16

Similar to the previous case, except the netmask consists of nnn high-order 1 bits.