bmc

module RFC1918
  def is_rfc1918_address(ip)
    unless ip =~ /^(\d{1,3}).(\d{1,3}).(\d{1,3}).(\d{1,3})$/
      raise "#{ip} is not an IP address"
    end

    octets = [$1, $2, $3, $4].map &:to_i
    raise "#{ip} is a bad IP address" unless octets.all? {|o| o < 256}

    # The Internet Assigned Numbers Authority (IANA) has reserved the