Recent advances in intrusion detection field brought new requirements to intrusion prevention and response. Traditionally, the response to an attack was manually triggered by an administrator. However, increased complexity and speed of the attack-spread during recent years showed acute necessity for complex dynamic response mechanisms. Although intrusion detection systems are being actively developed, research efforts in intrusion response are still isolated. In this work we present taxonomy of intrusion response systems, together with a review of current trends in intrusion response research. We also provide a set of essential fetures as a requirement for an ideal intrusion response system.