':return:
A list of unicode strings of valid IP addresses for the certificate'

@property
def valid_ips(self):

    if (self._valid_ips is None):
        self._valid_ips = []
        if self.subject_alt_name_value:
            for general_name in self.subject_alt_name_value:
                if (general_name.name == u'ip_address'):
                    self._valid_ips.append(general_name.native)
    return self._valid_ips
