Contains one or more IP addresses or blocks of IP addresses specified in Classless Inter-Domain Routing (CIDR) notation. To specify an individual IP address, you specify the four-part IP address followed by a /32, for example, 192.0.2.0/31. To block a range of IP addresses, you can specify a /24, a /16, or a /8 CIDR. For more information about CIDR notation, perform an Internet search on cidr notation.
