'Set the zone Basic Security Level to I\'M UNDER ATTACK! / HIGH /
MEDIUM / LOW / ESSENTIALLY OFF.
:param level: Security level. Valid values are: help, high, med, low,
eoff.
:type level: ``str``'

def ex_set_zone_security_level(self, zone, level):

    params = {'z': zone.domain, 'v': level}
    self.connection.set_context({'zone_domain': zone.domain})
    resp = self.connection.request(action='sec_lvl', params=params)
    result = resp.object
    return (result.get('result', None) == 'success')
