1. A method ( 400, 500, 600, 700 ) for synchronizing state information in a security gateway cluster, said security gateway cluster comprising at least two nodes, said method comprising the step of: synchronizing ( 403 ) state information by sending state information from a first node of said at least two nodes, characterized in that it comprises the steps of: detecting ( 401 ) in said security gateway cluster a predetermined irregularly occurring action, and initiating ( 402 ) synchronization of state information as a response to said action, and in that in said step of synchronizing state information, state information is sent to at least a second node of said at least two nodes.