register_options(
        [
          OptString.new('OUTINF',    [true, 'The external interface connected to the internet', 'eth1']),
          OptString.new('ININF',     [true, 'The internal interface connected to the network', 'eth2']),
          OptString.new('CLIENTIP',  [true, 'The ip of the client behind the BNAT router', '192.168.3.2']),