Definition of IpRange
The IPv4 address range. You can either specify a CIDR block or a source security group, not both. To specify a single IPv4 address, use the /32 prefix length.
A description for the security group rule that references this IPv4 address range.
Constraints: Up to 255 characters in length. Allowed characters are a-z, A-Z, 0-9, spaces, and ._-:/()#,@[]+=&;{}!$*