code: def check_client_ip(self, rule):
          
  
          if not rule.get('from'):
              self.logdebug('no "from" requirement.\n')
              return True
  
          allow_from = rule.get('from')
          if not isinstance(allow_from, list):
              allow_from = [allow_from]
          client_ip = self.get_client_ip()
  
          if client_ip in allow_from:
              self.logdebug('client_ip %s in %s\n' % (client_ip, allow_from))
              return True
          else:
              self.logdebug('client_ip %s not in %s' % (client_ip, allow_from))
              return False
docs: If a client IP is specified, verify it is permitted.