SavaPage uses CIDR Notation for IP address restriction where needed.
Classless Inter-Domain Routing (CIDR) is developed in the 1990s as a standard scheme for routing network traffic across the Internet.
CIDR notation is a syntax for specifying IP addresses and their associated prefix size, the latter being equivalent to the number of leading 1 bits in the routing prefix mask. The notation starts with an IP address expressed according to the standards of IPv4 or IPv6[26]. It is followed by a separator character, the slash (/) character, and the prefix size expressed as a decimal number.
Some examples:
172.16.0.0/24 represents the given IPv4 address
and its associated routing prefix 172.16.0.0, or
equivalently, its subnet mask 255.255.255.0. This
represents the host address range 172.16.0.0 -
172.16.0.255.
CIDR
192.168.1.40/32 represents the single IPv4
address 192.168.1.40.
CIDR
2021:661:4cc6:1:5561:96ff:ca11:d4a/128 represents
the single IPv6 address
2021:661:4cc6:1:5561:96ff:ca11:d4a.
CIDR
2021:661:4cc6:1:5561:96ff:ca11:d00/120 represents
a block size of 256 with First IP
2021:661:4cc6:1:5561:96ff:ca11:d00 and a Last
IP 2021:661:4cc6:1:5561:96ff:ca11:dff .
For SavaPage use only we define a CIDR Set as a concatenation of single CIDR notations separated by any of the characters space, comma or semicolon.