7f63d91c_a_Whois_Server_version_0_4_1_3__description
[property] db.inetnum.match [value] \\A(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)(\\.(25[0-5]|2[0-4]\\d|[0-1]?\\d?\\d)){3}(/[0-9]{1,2})*\\z [description] 
the regex to match a query string (see sample.cfg for IPv6 regex)
jwhoisserver :: Java Whois Server version 0.4.1.3
description