# represented as 192.168.1.0/24). This means that abuse across an ISP #
# is detected and curtailed much easier. Here is a good chart that #
# shows how many IPs the different CIDRs correspond to: #
-# http://en.wikipedia.org/wiki/CIDR#Prefix_aggregation #
+# https://en.wikipedia.org/wiki/IPv4_subnetting_reference #
+# https://en.wikipedia.org/wiki/IPv6_subnetting_reference #
# #
<cidr