# File lib/action_controller/request.rb, line 93
    def remote_ip
      return @env['HTTP_CLIENT_IP'] if @env.include? 'HTTP_CLIENT_IP'

      if @env.include? 'HTTP_X_FORWARDED_FOR' then
        remote_ips = @env['HTTP_X_FORWARDED_FOR'].split(',').reject do |ip|
            ip =~ /^unknown$|^(10|172\.(1[6-9]|2[0-9]|30|31)|192\.168)\./i
        end

        return remote_ips.first.strip unless remote_ips.empty?
      end

      @env['REMOTE_ADDR']
    end