'Initialize with a numeric port to listen on.'

def __init__(self, port, factory, backlog=50, interface='', reactor=None):

    base.BasePort.__init__(self, reactor=reactor)
    self.port = port
    self.factory = factory
    self.backlog = backlog
    if abstract.isIPv6Address(interface):
        self.addressFamily = socket.AF_INET6
        self._addressType = address.IPv6Address
    self.interface = interface
