The host name, IP address or IP range.
IP addresses use the form
N.N.N.N for IPv4 and H:H:H:H:H:H:H:H for IPv6.
where N is a number from 0 to 255 and H is a hexidecimal number from 0000 to FFFF.
IP ranges use the form
N.N.N.N-N.N.N.N for IPv4 and H:H:H:H:H:H:H:H-H:H:H:H:H:H:H:H for IPv6
or
[N|*].[N|*].[N|*].[N|*] for IPv4 and [H|*]:[H|*]:[H|*]:[H|*]:[H|*]:[H|*]:[H|*]:[H|*] for IPv6.
where N is a number from 0 to 255, H is a hexidecimal number from 0000 to FFFF and * is for any value.
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