An IPv4 or IPv6 address range that the source IP address of an incoming packet must match.
The service accepts only classless inter-domain routing (CIDR) format (x.x.x.x/y or x:x::x/y) strings.
Specify 0.0.0.0/0 or ::/0 to match all incoming traffic.
A rule condition that checks client source IP against specified IP address or address range.