Embodiments of the present disclosure provide a method in a network element for access controlling. The method comprises receiving an access request message from a terminal device and checking a data structure for maintaining state information of terminal devices from which the network element has received access request messages, in response to the reception of the access request message. The method also comprises determining whether the requesting terminal device is abnormal based on said checking of the data structure and rejecting the access request of the requesting terminal device in response to determining that the requesting terminal device is abnormal.