With the growing advances in the technology the uses of computer systems and the internet is also growing at a rapid rate, and with the increase in their usage vulnerabilities and threats are also increasing tremendously. A large number of approaches have been proposed till now for improving the security of a host system and a network. One of the proposed approach is an Intrusion Detection System (IDS). An IDS works for a system is referred as Host IDS and the one that works for a network is referred as Network IDS. But their functionality is specific to particular host and a network, one does not work as an alternative to another. Thus, an IDS is needed that overcomes the drawbacks of both the systems and combines their advantages to form a Hybrid Intrusion Detection System. An Hybrid IDS captures both host and network data and thereby apply an analysis approach. In order to make these systems robust and effective biologically inspired Artificial Immune System (AIS) approaches can be used that makes the system flexible enough to work in every scenario. This paper provides a review of various IDS and application of various AIS approaches to them.

Host Intrusion Detection System (HIDS) Network Intrusion Detection System (NIDS) Hybrid intrusion Detection System Artificial Immune System