Put every entry on one line. Valid entries are either full IP address (such as <b>192.168.10.1</b>) which matches a single host; or partial address (such as <b>192.168</b>) which matches any address starting with those numbers; or CIDR notation (such as <b>231.54.211.0/20</b>); or a range of IP addresses (such as <b>231.3.56.10-20</b>) where the range applies to the last part of the address. Text domain names (like 'example.com') are not supported. Blank lines are ignored.