METHOD, COMPUTER PROGRAMME, DEVICE AND SYSTEM FOR PROTECTING A SERVER AGAINST DENIAL-OF-SERVICE ATTACKS

摘要

The invention concerns in particular a method for protecting a server (10) against denial-of-service attacks using a protocol whereby a communication session setup between a client (26) and the server (10) is requested by the client for providing a service. An intermediate equipment (30) intercepts the service request emitted by the client (10) and verifies whether the client (26) is present in the table of clients considered as reliable. If the client (10) is not present in the table, the intermediate equipment (30) replies to the request and includes in the reply an identifier. If the client (10) sends an acknowledgement within a predetermined delay including the identifier, the client is included in the table of clients considered as reliable.