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jimsynz/gist:262010

Created December 22, 2009 20:18
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gistfile1.rb
# Getting a list of reverse zones needed to fully
# delegate a prefix:
>> IPAddr.new("2001:db8::/33").reverses
=> ["0.8.b.d.0.1.0.0.2.ip6.arpa", "1.8.b.d.0.1.0.0.2.ip6.arpa", "2.8.b.d.0.1.0.0.2.ip6.arpa", "3.8.b.d.0.1.0.0.2.ip6.arpa", "4.8.b.d.0.1.0.0.2.ip6.arpa", "5.8.b.d.0.1.0.0.2.ip6.arpa", "6.8.b.d.0.1.0.0.2.ip6.arpa", "7.8.b.d.0.1.0.0.2.ip6.arpa"]
>> IPAddr.new("130.216.32.0/20").reverses
=> ["130.216.32.in-addr.arpa", "130.216.33.in-addr.arpa", "130.216.34.in-addr.arpa", "130.216.35.in-addr.arpa", "130.216.36.in-addr.arpa", "130.216.37.in-addr.arpa", "130.216.38.in-addr.arpa", "130.216.39.in-addr.arpa", "130.216.40.in-addr.arpa", "130.216.41.in-addr.arpa", "130.216.42.in-addr.arpa", "130.216.43.in-addr.arpa", "130.216.44.in-addr.arpa", "130.216.45.in-addr.arpa", "130.216.46.in-addr.arpa", "130.216.47.in-addr.arpa"]
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