'Create an IP tables firewall driver instance
:param execute: unused, pass None
:param kwargs: extra arguments
The @kwargs parameter must contain a key \'host\' that
maps to an instance of the nova.virt.libvirt.host.Host
class.'

def __init__(self, execute=None, **kwargs):

    super(IptablesFirewallDriver, self).__init__(**kwargs)
    self.nwfilter = NWFilterFirewall(kwargs['host'])
