class IPService class << self def ip_trusted?(ip) ip_address = parse_address(ip) trusted_networks.any? { |network| network.include?(ip_address) } end private def trusted_networks if ENV['TRUSTED_NETWORKS'].present? ENV['TRUSTED_NETWORKS'] .split .filter_map { |string| parse_address(string) } else [] end end def parse_address(address) begin IPAddr.new(address) rescue nil end end end end